JP2016075039A5 - - Google Patents

Description

Control method of discharge flow from discharge means to river in water storage facility

  The present invention relates to a method for adjusting the discharge flow rate from a discharge means to a river in a water storage facility comprising a water intake means for taking a part of water of a river and a discharge means for always discharging a part of the water directly into a river. .

  The method for adjusting the discharge flow from the discharge means to the river in the above water storage facility is to set the water level of the water storage facility in advance by controlling the water intake of the water intake means with respect to the increase or decrease in the amount of water flowing into the water storage facility. Some are realized by being located near the central water level. As this type of technology, for example, a technology disclosed in Patent Document 1 below is known. In this technology, an openable intake gate (corresponding to the above intake means) and water overflowing from the dike are discharged into a dike that is a water storage facility in the river as water that can maintain the maintenance flow rate in the river. Both discharge means are provided that make it possible. According to this technique, even when the amount of water flowing into the water storage facility increases or decreases, it is possible to ensure the maintenance flow rate in the river by controlling the opening and closing of the intake gate.

  In the present specification, the “maintenance flow rate” is at least necessary to maintain various functions of the river, such as securing the water depth necessary for river shipping or maintaining the habitat of aquatic organisms. It refers to the water flow rate. In other words, when taking water from a river, it is necessary to carry out water intake so that the water flow rate of the river does not always fall below the maintenance flow rate.

JP2013-151891A

  In the technique disclosed in Patent Literature 1, the opening / closing control of the intake gate is executed so as to realize a state where a predetermined flow rate of water flows in the river. For this reason, in the said technique, when the inflow amount of the water to the said water storage facility reduces, the water flow rate of the said river may reduce during performing control corresponding to this reduction. That is, in the above technique, it is necessary to set the predetermined flow rate so that the water flow rate does not fall below the maintenance flow rate of the river even when the water flow rate decreases. And in the said technique, the problem that the water flow rate which can be taken in from the said river by the setting of the said predetermined flow volume decreased occurred.

  The present invention has been devised to solve the above problems. That is, the present invention can take in water from this river by narrowing down the minimum water flow rate of the river, which can cope with a decrease in the amount of water flowing into the water storage facility while ensuring the maintenance flow rate of the river. It is an object of the present invention to provide a method for adjusting the discharge flow rate from the discharge means to the river in the water storage facility, which makes it possible to increase the water flow rate.

  In order to solve the above problems, the method for adjusting the discharge flow from the discharge means to the river in the water storage facility of the present invention takes the following means.

First, the first invention is a method for adjusting the discharge flow rate from the discharge means to the river in the water storage facility. Here, the water storage facility is provided with a damming means for damaging a part of the river so as to realize that the water of the river is stored. Further, water storage facility, at least a portion of the state, which is water by damming means water, this discharge amount determined by the level of the water, one to discharge always directly downstream of river damming means or A plurality of discharge means are provided. In addition, the water storage facility is a water intake formed as a gate that realizes that a part of the water stored by the damming means is taken to a different route from the direct discharge of the water from the discharge means. Means. Further, the water storage facility includes a control unit that realizes control of the amount of water taken by the water intake unit by adjusting the opening of the water intake unit.
In addition, there is an ideal water level that is the water level of the river where the sum of the water discharge from each discharge means is equal to the maintenance flow that is the minimum water flow required to maintain the various functions of the river. . In addition, when the river water flow becomes the lowest possible water flow, the amount of water that is always used is the maximum water flow that can be flowed from the river through the above route while ensuring the maintenance flow of the river. Exists.

The first aspect, the control means relative to the increase or decrease in the inflow of water into the water storage facility the water level of reservoir water water intake to control to reservoir property intake means, discharge amount of the sum of river there is no risk below maintain flow, and that the closer to the preset water level as water level may be greater than constantly using water the water intake of water by intake means, predetermined the discharge amount of water by discharge means It is the method of adjusting so that it may be settled in the flow-rate range. This method has a water level recognition step for causing the control means to recognize the water level stored in the water storage facility as the stored water level. In the above method, the water level lowering control step is executed when the stored water level is higher than the upper threshold water level set in advance as a higher water level than the ideal water level. In this water level lowering control step, the level of water stored in the water storage facility is lowered by adjusting the opening of the water intake means to increase the water intake of the water intake means, and this water level is higher than the ideal water level. As described above, the control unit is caused to execute control so that the target water level decreases in advance. Further, in the above method, when the stored water level is lower than the lower threshold water level set in advance as a water level higher than the ideal water level and lower than the upper threshold water level, the water level elevation control step is executed. This water level rise control step raises the water level stored in the water storage facility by adjusting the water intake means to reduce the amount of water taken by the water intake means, and this water level is higher than the ideal water level. As described above, the control means is made to execute control to achieve the preset target water level.

In the above method, a plurality of steps including a water level recognition step, a water level lowering control step, and a water level raising control step are repeatedly executed. Moreover, the rising target water level is set as a lower water level than the upper threshold water level. Moreover, lowering the target level is higher than the lower threshold level, and is set as a low have water as compared with the increase in the target level.

According to the first invention, when the inflow amount of water in the river is reduced and the water level of the water storage facility is lowered, the opening of the water intake means is adjusted so that the water level of the water storage facility becomes the rising target water level. , ensure the water flow rate of the river is Ru been achieved.

Further, according to the first invention, when the inflow amount of water in the river is increased and the water level of the water storage facility rises, the opening of the water intake means is adjusted so that the water level of the water storage facility becomes the target water level that decreases. Te, Ru increases in water intake from the water introducing section is achieved.

  Next, the second invention is the first invention described above, wherein the control means sets the stored water level corresponding to the water level actually stored in the water storage facility in the water level lowering control step and the water level raising control step. The stored water level is calibrated using a stored water level correction amount that is calibrated to the water level used in the control of the control means. Further, when it is determined that the condition described later is satisfied, the control means executes a correction step having a process of correcting the stored water level correction amount. The above condition is that one of the water level lowering control step or the water level raising control step executed one time before is repeated this time, and the repetition of this one step is repeated in one step that will be repeated this time. It is a condition that the number of repetitions since the start is a predetermined number or more. The correction step is executed before executing one of the steps that will be repeated this time.

  In the control for maintaining the fluctuation amount within the predetermined range, the fact that the fluctuation amount continues to deviate from the predetermined range only to one side means that the control cannot cope with the fluctuation of the fluctuation amount. To do. Here, according to the second aspect, when only one of the water level lowering control step or the water level raising control step is repeated, the water level that determines the adjustment amount of the opening of the water intake means is calibrated. Thus, it is possible to make the repeated control correspond to the fluctuation of the water level. From this, it is possible to avoid a state where it is not possible to keep up with fluctuations in the amount of water flowing into the water storage facility for a long period of time, and from the discharge means in the water storage facility that can increase the amount of water that can be taken from the river. It is possible to provide a method for adjusting the discharge flow into the river.

  Further, the third invention is the above-described second invention, further comprising a time-series data preparation step and an extraction step. Here, the time series data preparation step prepares the stored water level recognized by the control means in the repeatedly executed water level recognition step as time series data corresponding to the time at which the recognition was performed. In addition, the extraction step is based on the above time series data, the maximum water level when the reservoir water level is switched from rising to decreasing, and the minimum water level when the reservoir water level is switching from decreasing to rising, Is extracted.

  In the third invention, the correction step includes a first selection process executed when the first condition setting is satisfied and a second selection process executed when the second condition setting is satisfied. have. Here, the first condition setting includes a condition that it is known that only the water level lowering control step is to be repeated. Further, the second condition setting includes a condition that it has been found that only the water level elevation control step is to be repeated.

  The first selection process includes a process of correcting the stored water level correction amount based on a water level difference between the previous water level minimum value and the lowering target water level. Further, the second selection process includes a process of correcting the stored water level correction amount based on the water level difference between the previous water level maximum value and the rising target water level.

According to the third aspect of the present invention, when the inflow amount of water into the water storage facility fluctuates, the water level stored in the water storage facility by offsetting the effect of this fluctuation is set to the upper threshold water level as the maximum water level, It is possible to set a control amount that can be positioned in the water level area with the side threshold water level as the lowest water level . This provides a method for adjusting the discharge flow from the discharge means to the river in the storage facility that can increase the flow rate of water that can be taken from the river, more accurately responding to fluctuations in the amount of water flowing into the storage facility. can do.

  Furthermore, the fourth invention is the above-described second or third invention, wherein the following processing is performed at each control step start timing at which one of the water level lowering control step and the water level raising control step is started. It is. This process is a process of preparing as a data corresponding to each control step start timing which one of the water level lowering control step and the water level raising control step is started at each control step start timing.

  In the fourth invention, when the third condition setting is satisfied, a plurality of steps including a first time interval acquisition step, a second time interval estimation step, and a setting step are used as the correction step. Executed. Here, in the third condition setting, when the correction step is executed, one of the steps that will be repeated this time is executed one or more times after the repetition of this one step starts. It includes the condition that it has been found to be a step. In addition, the first time interval acquisition step includes a control step start timing corresponding to one step executed twice before, and a control step start timing corresponding to one step executed once before Is obtained as the first time interval. The second time interval estimation step includes a control step start timing corresponding to one step executed one time before and a time at which one step to be repeated this time is scheduled to be executed. The time interval between them is estimated as the second time interval. In the setting step, the stored water level correction amount is corrected and set based on a ratio between the second time interval and the first time interval.

In the second invention described above, when one of the water level lowering control step and the water level raising control step is repeated three times or more, the amount of water flowing into the water storage facility continues to increase or decrease relatively stably. It can be said that this is a gradually changing state. Further, at each control step start timing at which the one step is repeated, the amount of water stored in the water storage facility is substantially the same. For this reason, it can be said that the total inflow amount and the total outflow amount of water to the water storage facility are substantially equal in a time range from the execution of the one step to the execution of the one step. Further, in the present invention, control is performed so that the water level stored in the water storage facility is positioned in a water level area in which the upper threshold water level is the highest water level and the lower threshold water level is the lowest water level . Furthermore, in the second aspect, when the amount of water flowing into the water storage facility is in the gradually changing state, control for changing the amount of water taken by the water intake means during the time range is not executed. For this reason, the flow rate of water flowing out of the water storage facility is substantially constant in the above time range.

  Here, according to the fourth aspect, when the amount of water flowing into the water storage facility is in the gradually changing state, the following processing can be performed. This process includes the average amount of water flowing into the water storage facility and the flow rate of water flowing out of the water storage facility between the time when the one step is executed and the time when the one step is executed next. Is a process for matching. This provides a method for adjusting the discharge flow from the discharge means to the river in the storage facility that can increase the flow rate of water that can be taken from the river, more accurately responding to fluctuations in the amount of water flowing into the storage facility. can do.

  Further, the fifth invention is any one of the first to fourth inventions described above, and is a total differential which is a variation amount of the flowing water flow rate with respect to a derivation formula of the flowing water flow rate from the damming means. This invention is based on the premise that a total differential expression for deriving a quantity is defined. Here, the derivation formula of the flowing water flow rate is an equation including at least the opening degree of the water intake means and the water intake level described later as parameters. The total differential equation is defined in a form including at least a first minute change term corresponding to a change in intake water level and a second minute change term corresponding to a change in opening of the intake means. Is.

  In the fifth aspect of the invention, when the water level of the water stored in the water storage facility is adjusted to the target water level that is the control target value of the water level by adjusting the opening of the water intake means, the intake water level change amount derivation step And a plurality of steps including an opening degree adjusting step. Here, the intake water level change amount deriving step derives, as the water level change amount, a change amount of the intake water level, which will be described later, when the water level stored in the water storage facility changes from the stored water level to the target water level. It is a step. Here, the water intake level is a water level at which water is taken in the water intake means. The opening adjustment step adjusts the opening of the water intake means in accordance with the magnitude of the second minute change amount. Here, the magnitude of the second minute change amount is substituted into the total differential equation when the intake water level change amount derived by the intake water level change amount deriving step is substituted into the first minute change amount in the total differential equation. It is determined that it should be given in order to make the total differential amount 0 with respect to the obtained value.

For a predetermined amount derivation formula including a plurality of parameters, the total differential amount of the predetermined amount being 0 means that the influence of the minute change amount of each parameter on the predetermined amount cancels each other and becomes 0. Means. Here, according to the fifth aspect of the present invention, the minute change amount excluding the second minute change amount (that is, the adjustment amount of the opening degree of the water intake means) in the total differential expression of the flow-through water flow rate from the damming means. Is assigned. Then, the opening degree of the water intake means is adjusted based on the second minute change amount to be given in order to set the total differential amount that is the fluctuation amount of the water intake amount to 0 with respect to the substituted value. For this reason, it is theoretically possible to obtain the amount of adjustment of the opening degree of the water intake means required for obtaining steady water intake (that is, water intake whose water intake level and water level do not vary) from the substituted value of the minute change amount. it can. In addition, it is necessary to monitor and judge the monitoring worker by obtaining the intake water level change amount substituted as the first minute change amount based on the water storage level recognized by the control means and the target water level which is the control target value of the water level. The water level is set to a water level that has been set in advance as a water level that does not cause the sum of the discharge flow to fall below the maintenance flow rate of the river and that allows the water intake by the water intake means to be larger than the amount of water used at all times. It is possible to adjust the amount of water intake so that it approaches.
Furthermore, 6th invention is the adjustment method of the discharge flow from the discharge means in a water storage facility to a river. Here, the water storage facility is provided with a damming means for damaging a part of the river so as to realize that the water of the river is stored. In addition, the water storage facility has a discharge means that always discharges at least a part of the water stored by the damming means directly to a river downstream of the damming means at a discharge flow rate determined by the water level. I have. In addition, the water storage facility is a water intake formed as a gate that realizes that a part of the water stored by the damming means is taken to a different route from the direct discharge of the water from the discharge means. Means. Further, the water storage facility includes a control unit that realizes control of the amount of water taken by the water intake unit by adjusting the opening of the water intake unit.
In the sixth aspect of the invention, the control means controls the water intake amount of the water intake means to increase or decrease the amount of water flowing into the water storage facility, thereby bringing the water level stored in the water storage facility closer to the central water level set in advance. Thus, this is a method of adjusting the water discharge flow rate by the discharge means so as to be within a predetermined flow rate range. This method has a water level recognition step for causing the control means to recognize the water level stored in the water storage facility as the stored water level. In the above method, the water level lowering control step is executed when the stored water level is higher than the upper threshold water level set in advance as a water level higher than the central water level. In this water level lowering control step, the level of water stored in the water storage facility is reduced by adjusting the opening of the water intake means to increase the amount of water taken by the water intake means, and this water level is set in advance as a reduction target. Control for causing the water level to occur is executed by the control means. Further, in the above method, the water level raising control step is executed when the stored water level is lower than the lower threshold water level set in advance as a water level lower than the central water level. This water level rise control step raises the water level stored in the water storage facility by adjusting the water intake means to reduce the amount of water taken by the water intake means, and raises the water level in advance. Control for causing the water level to occur is executed by the control means.
In the above method, a plurality of steps including a water level recognition step, a water level lowering control step, and a water level raising control step are repeatedly executed. Further, the rising target water level is set as a water level that is lower than the upper threshold water level and higher by a first predetermined value that is 0 or more than the central water level. Further, the target water level for reduction is set as a water level that is higher than the lower threshold water level and lower by a second predetermined value that is higher than the first predetermined value compared to the central water level.
According to the sixth aspect, when the inflow amount of water in the river is reduced and the water level of the water storage facility is lowered, the opening degree of the water intake means is adjusted so that the water level of the water storage facility becomes the rising target water level. Securing the water flow of the river. At this time, the rising target water level is set as a water level located at a position higher than the central water level, so that the intake level is adjusted compared to the case where the opening level of the intake means is adjusted with the control target of the water level of the water storage facility as the central water level. It becomes possible to raise the water level of the water storage facility more rapidly by making the opening of the means smaller. As a result, it is possible to cope with a decrease in the inflow of water into the water storage facility while ensuring the maintenance flow rate of the river. It is possible to provide a method for adjusting the discharge flow from the discharge means to the river in a water storage facility capable of increasing the flow of water that can be taken from the river.
According to the sixth aspect of the invention, when the inflow amount of water in the river is increased and the water level of the water storage facility is increased, the opening of the water intake means is adjusted so that the water level of the water storage facility becomes the lower target water level. Thus, the amount of water taken from this water intake means can be increased. At this time, the lowering target water level is set as a water level lower than the central water level, so that the opening of the water intake means is increased, and the water level of the water storage facility is lowered more rapidly. As a result, the water storage facility that reduces the amount of water that flows down beyond the maintenance flow rate in the river while dealing with an increase in the amount of water flowing into the water storage facility, and realizes intake of a larger amount of water. It is possible to provide a method for adjusting the discharge flow rate from the discharge means to the river.
In addition, by setting the water level difference between the target water level to be lowered and the central water level larger than the water level difference between the target water level to be raised and the central water level, it will be possible to secure this maintenance flow while ensuring the maintenance flow of the river. It becomes possible to take in a larger amount of water in a state where it is not necessary (specifically, for example, a rich water state). In the present specification, the “high water state” means a state in which the amount of water flowing into the river is increased.

It is explanatory drawing showing schematic structure of the water storage facility to which the adjustment method of the discharge flow from the discharge means to the river in the water storage facility concerning one Embodiment of this invention is applied. It is explanatory drawing showing the structure of the principal part in the water storage facility of FIG. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is explanatory drawing explaining each water level set in this invention. It is a control block diagram for demonstrating the 1st Embodiment in this invention. It is explanatory drawing explaining each water level set in this invention. It is a flowchart showing the adjustment method of the discharge flow from the discharge means to the river in the water storage facility concerning the 2nd Embodiment in this invention. 10 is a flowchart showing a processing procedure for pattern 1 reduction branched from the flowchart of FIG. 9. It is a flowchart showing the processing procedure of the pattern 1 rise branched from the flowchart of FIG. 10 is a flowchart showing a processing procedure for pattern 2 reduction branched from the flowchart of FIG. 9. FIG. 10 is a flowchart showing a processing procedure for increasing pattern 2 branched from the flowchart of FIG. 9. FIG. 10 is a flowchart showing a processing procedure for pattern 3 reduction branched from the flowchart of FIG. 9. FIG. 10 is a flowchart showing a processing procedure for increasing pattern 3 branched from the flowchart of FIG. 9. FIG. 10 is a flowchart showing a processing procedure for pattern 4 reduction branched from the flowchart of FIG. 9. FIG. 10 is a flowchart showing a processing procedure for increasing pattern 4 branched from the flowchart of FIG. 9. FIG. FIG. 10 is a flowchart showing a processing procedure for reducing pattern 5 branched from the flowchart of FIG. 9. FIG. FIG. 10 is a flowchart showing a processing procedure for increasing pattern 5 branched from the flowchart of FIG. 9. FIG. FIG. 10 is a flowchart showing a processing procedure of pattern 6 reduction branched from the flowchart of FIG. 9. FIG. FIG. 10 is a flowchart illustrating a processing procedure for increasing pattern 6 branched from the flowchart of FIG. 9. FIG. FIG. 10 is a flowchart illustrating a processing procedure of a pattern 7 branched from the flowchart of FIG. 9. FIG. FIG. 23 is a flowchart showing adjustment control processing set in subroutine 1 of FIGS. 9 to 22. FIG. It is the graph showing how the amount of inflow of water to a water storage facility was changed in time in the 1st simulation experiment which verifies the effect of the present invention. It is a graph showing how the discharge flow rate of the water from the water storage facility was changed over time in the first simulation experiment. It is the graph showing how the smooth | stored water level was smoothly changed in the said 1st simulation experiment. It is the graph showing how the amount of inflow of water to a water storage facility was changed with time in the 2nd simulation experiment which verifies the effect of the present invention. It is the graph showing how the discharge flow rate of the water from the water storage facility was temporally changed in the second simulation experiment. In the second simulation experiment, it is a graph showing how the smoothed stored water level was changed over time. It is a graph similar to FIG. 29, and represents the simulation result when not implementing the 4th invention of this invention. It is explanatory drawing for demonstrating each time interval handled by the process of the pattern 4 reduction | decrease of FIG. It is explanatory drawing for demonstrating each time interval handled by the process of the pattern 4 raise of FIG.

  Below, the adjustment method of the discharge flow from the discharge means to the river in the water storage facility concerning one Embodiment of this invention is demonstrated using drawing. As shown in FIG. 2, the method for adjusting the discharge flow rate from the discharge means to the river in this water storage facility allows a computer installed with a discharge flow rate adjustment program to be described later to function as the control means 20. This is a method of adjusting the discharge flow rate of water 90A.

  That is, a storage (a storage device, not shown) that can be freely accessed by the computer is connected to the computer. In this storage, a discharge flow adjustment program for realizing a method for adjusting the discharge flow from the discharge means to the river in the water storage facility is recorded in a computer-readable manner. This discharge flow rate adjustment program causes the above computer to function as the control means 20, thereby realizing the automatic adjustment of the discharge flow rate of the water 90A from the water storage facility 10 without any operation by the monitoring worker. .

  Here, the configuration of the water storage facility 10 will be described. As shown in FIGS. 1 and 2, the water storage facility 10 is a concrete water intake dam 11 that realizes that the water 90 A of the river 90 is stored by blocking a part of the river 90. It has. This intake dam 11 corresponds to the “damping means” in the present invention. In addition, the water storage facility 10 includes water intake means 14 formed as a slide gate that realizes that a part of the water 90A stored by the intake water dike 11 is led to the water intake path 14A to be taken in. ing. Here, the intake channel 14 </ b> A corresponds to a “route” in the present invention.

Intake means 14, as shown in FIGS. 2 and 3, by adjusting the opening a ₁ water intake means 14 at a constant speed in accordance with the control signal 20B to the control unit 20 outputs, intake passage 14A from the water introducing section 14 Opening and closing device 14D that can increase or decrease the amount of water intake is provided. In other words, the control unit 20, by adjusting the opening a ₁ water intake means 14, so as to realize the control of the water intake of the water 90A by water intake means 14. In addition, the control means 20 is installed in the building 20A provided in the water storage facility 10, as shown in FIG.

As shown in FIGS. 2 and 3, the intake channel ₁₄ </ b> A is a rectangular cross-section open channel formed such that the channel width B ₁ (see FIG. 2, for example, B ₁ = 7 [m] in the present embodiment) is constant. It is. Here, the water channel width B ₁ is set to the opening width of the water intake means 14. In addition, the intake channel 14A is configured so as to allow the water 90A to flow down in a uniform flow state by extending in a substantially straight line with a constant channel bed gradient. With this configuration, the intake of water 90A by the intake means 14 is realized by the outflow of water 90A from the intake means 14 to the intake passage 14A (see FIG. 3). Further, water intake to _{Q 1} water 90A by water introducing section 14 is determined by the following Equation (1).

Here, C ₁ is the correction factor of water flow due to the viscosity of water (i.e., the flow rate coefficient). Moreover, g is a gravitational acceleration. Further, a _1, as shown in FIGS. 2 and 3, an opening degree of the intake means 14 described above. Further, B _1, as shown in FIG. 2, a water channel width of the intake passage 14A as described above. Further, H _1, as shown in FIGS. 2 and 3, the level of the water 90A in a state of being water upstream of the water introducing section 14 is a representation based on the bottom of Tosuiro 14A. In addition, as shown in FIG. 3, h represents the water level of water 90 </ b> A flowing downstream from the intake means 14 by a distance L in the intake path 14 </ b> A with reference to the bottom of the intake path 14 </ b> A. is there. Here, the distance L is a distance that is long enough to ignore the ripples on the water surface caused by the outflow of the water 90A described above in the measurement of the water level h (for example, L = 30 × B ₁ = 210 [m] in this embodiment). ) Is set.

  As shown in FIG. 1, the intake channel 14 </ b> A allows water 90 </ b> A to flow down toward the hydroelectric power generation facility 10 </ b> A (see FIG. 1). The hydroelectric power generation facility 10 </ b> A performs hydroelectric power generation using the water 90 </ b> A flowing down from the intake channel 14 </ b> A, and discharges the water 90 </ b> A after being used for the hydroelectric power generation to the river 90 on the downstream side of the water storage facility 10. ing.

In addition, as shown in FIGS. 2 and 4, a part of the water 90 </ b> A stored in the intake dam 11 is partly taken downstream of the intake dam 11 (see FIG. 4). The right side of the river 90 is provided with a dam discharge sand gate 12 which is a slide gate that is opened so as to be always discharged directly. As shown in FIG. 2, the dike drainage gate 12 is formed so that the opening width is B _2, and the opening degree is set to be a ₂ that is a predetermined opening degree. . Further, En Tsutsumi Haisunamon 12, reservoir its opening during flooding water inflow 90A becomes excessive to the facility 10 to be larger than a _2, river water 90A that is excessively flows 90 It is designed to function as a spillway to escape. In addition, as shown in FIG. 4, the dam discharge sand gate 12 implement | achieves the said direct discharge | release by the free outflow of water 90A. Thus, discharge amount _{Q 2} of water 90A by en Tsutsumi Haisunamon 12 is determined by the following Equation (2).

Here, C ₂ is the correction factor of water flow due to the viscosity of water (i.e., the flow rate coefficient). Moreover, g is a gravitational acceleration. Also, a _2, as shown in FIGS. 2 and 4, a degree of opening of the ene bank Haisunamon 12 described above. Further, B _2, as shown in FIG. 2, an opening width of the end described above bank Haisunamon 12. Further, as shown in FIGS. 2 and 4, H ₂ is based on the water level of the water 90 </ _b > A stored on the upstream side of the embankment drainage gate 12 and the lower edge of the opening of the embankment drainage gate 12. It is expressed as

Above (Equation 2) is discharged quantity Q ₂ of water 90A by en Tsutsumi Haisunamon 12, which means that it is determined by the level of the reservoir water 90A by bank 11 ¥ intake. Moreover, the river 90 from which the dam discharge sand gate 12 directly discharges the water 90A is different from the intake channel 14A through which the water intake means 14 guides the water 90A, as shown in FIG. That is, the embankment drainage gate 12 corresponds to the “release means” in the present invention.

  In the direct discharge, the water 90A is discharged as a jet from the dam discharge sand gate 12, as shown in FIGS. This jet has such a high flow velocity that it may cause a scouring phenomenon in which the riverbed of the river 90 is scraped away. For this reason, on the riverbed of the river 90 on the downstream side of the dam discharge sand gate 12, a floor protection 12A, which is a concrete panel that reinforces this riverbed and suppresses the occurrence of the scouring phenomenon, is installed. As shown in FIG. 4, the floor protection work 12 </ b> A is integrated with the dam discharge sand gate 12 in the water storage facility 10 of the present embodiment.

  Further, the above-mentioned jet stream has such a high flow velocity that it makes it impossible for the aquatic organism 90B (see FIG. 5) inhabiting the river 90 to go upstream from the downstream side to the upstream side of the river 90. Therefore, as shown in FIGS. 1 and 5, the intake dam 11 is provided with a fishway 13 that allows the aquatic organism 90 </ b> B (see FIG. 5) to realize the run-up over the intake dam 11. . This fishway 13 allows a part of the water 90A stored by the intake dam 11 to be discharged directly to the river 90 on the downstream side of the intake dam 11 (see FIG. 1) more gradually and directly than the above jet. The state in which the aquatic organism 90B can be run up is always maintained.

As shown in FIGS. 2 and 5, the fishway 13 is formed to have a predetermined width B ₃ (see FIG. 2), and is in the length direction of the fishway 13 (left and right as viewed in FIG. 5). It is a staircase type fishway provided with parallel partition walls 13A. As shown in FIGS. 1 and 5, the partition walls 13 </ b> A are arranged at a predetermined interval from the upstream side (right side as viewed in FIG. 5) to the downstream side (left side as viewed in FIG. 5). Thus, a plurality of flooded areas 13B in which the flow rate of the water 90A is suppressed are set in the fishway 13. As shown in FIG. 5, the inundation area 13 </ b> B is set so as to line up from the upstream side to the downstream side in the fishway 13, thereby attempting to run up the river 90 (see FIG. 1) through the fishway 13. The aquatic organism 90 </ b> B can go up while resting in the fishway 13.

As shown in FIG. 5, the fishway 13 realizes the discharge of the water 90 </ b> A stored by the intake dam 11 as a free overflow of the water 90 </ b> A stored by the intake dam 11. Further, the partition wall 13A located on the most upstream side (right side as viewed in FIG. 5) of the partition walls 13A of the fishway 13 is formed as a horizontal flat surface. Thus, discharge amount _{Q 3} of water 90A by fish ladder 13 is determined by the following Equation (3).

Here, C ₃ is the correction factor of water flow due to the viscosity of water (i.e., the flow rate coefficient). Also, B _3, as shown in FIG. 2, the width of the fishway 13 described above. Further, as shown in FIGS. 2 and 5, H ₃ is a partition wall 13A located at the most upstream side (right side in FIG. 5) in the fishway 13 with respect to the water level of the water 90A stored by the intake dam 11. It is expressed on the basis of the upper surface of.

Above (Equation 3) is discharged quantity Q ₃ of water 90A by fishway 13, which means that it is determined by the level of the reservoir water 90A by bank 11 ¥ intake. Further, the river 90 through which the fishway 13 directly discharges the water 90A is different from the intake channel 14A through which the water intake means 14 guides the water 90A, as shown in FIG. That is, the fishway 13 corresponds to the “release means” in the present invention.

According to each configuration described above, the sum Q ₂ + Q ₃ of the discharge amount of the water 90A from the dam discharge sand gate 12 and the fishway 13 is determined by the water level of the water 90A stored in the water storage facility 10. By utilizing this property, the control means 20, the adjustment of the discharge amount of water 90A from reservoir facility 10 described above, are water storage facility 10 controls the water intake to Q ₁ water 90A by water introducing section 14 This is achieved by setting the water level of the water 90A to a target water level that is close to the central water level (see FIG. 6). Thereby, the control means 20 adjusts the discharge flow rate of the water 90A from the water storage facility 10 so as to be within a predetermined flow rate range corresponding to the inflow amount of the water 90A flowing into the water storage facility 10. The central water level is set as a water level higher than the ideal water level (see FIG. 6), which is the water level at which the sum Q ₂ + Q _{3 of the} discharge flow rate becomes equal to the maintenance flow rate of the river 90. In other words, the central water level is such that the sum Q ₂ + Q _{3 of the} discharge flow rate does not fall below the maintenance flow rate of the river 90, and the water intake amount Q ₁ of the water 90 A by the water intake means 14 is always constant in the hydroelectric power generation facility 10 A. This is a water level set in advance as a water level that can be made larger than the amount of water used. In the present specification, the “normally used water amount of the hydroelectric power generation facility 10 </ b> A” refers to the river 90 while ensuring the maintenance flow rate of the river 90 when the water flow rate of the river 90 is the lowest possible water flow rate. The maximum water flow rate that can flow from 90 to the hydroelectric power generation facility 10A.

<Processing according to the first embodiment by the control means 20 (FIGS. 7 and 8)>
Next, the processing according to the first embodiment, which is executed when the control means 20 performs feedback control to implement the present invention, will be described mainly using the control block diagram of FIG.

  In the control block diagram shown in FIG. 7, five control blocks 21, 22, 23, 24, and 25 are set. In the control block 21, the central water level and the ideal water level are input in advance as data. Further, in the control block 21, there are four water levels: an upper threshold water level and a rising target water level that are higher than the central water level, and a lower threshold water level and a lower target water level that are located between the central water level and the ideal water level. Is set in advance. Then, in the control block 21, one of the four water levels is selected as the target water level based on the state of control from the past to the present and the smoothed stored water level, and is output as an addition term to the node N10. The smoothed stored water level is a water level obtained by smoothing the stored water level of the water storage facility 10 detected by the water level measuring device 11 </ b> A by the control block 22. The target water level is a water level that is a control target value in controlling the water level of the water 90 </ b> A stored in the water storage facility 10.

  The target water level from the control block 21 is input to the node N10 as an addition term, and the smoothed stored water level from the control block 22 is input as a subtraction term. On the other hand, the node N10 calculates the deviation between the input target water level and the smoothed water storage water level, and outputs it to the first part 23A of the control block 23.

  In the first part 23A of the control block 23, the target water level from the control block 21, the smoothed reservoir water level from the control block 22, the intake downstream water level smoothed in the control block 25, and the past to the present And the state of control to be input. Here, the intake downstream water level is the water level of the intake channel 14A detected by the water level measuring device 14B. Further, the first part 23A of the control block 23 is based on the input target water level, the smoothed reservoir water level, the smoothed intake downstream water level, and the state of control from the past to the present, The process for the stored water level correction amount is executed. And 1st part 23A of control block 23 outputs the stored water level correction amount after a process to node N20 as an addition term.

  In the node N20, the stored water level correction amount from the first part 23A of the control block 23 and the smoothed water level from the control block 22 are respectively input as addition terms, and a predetermined water depth difference is used as a subtraction term. Entered. On the other hand, the node N20 outputs the addition / subtraction calculation results of the above terms as a water level to the second part 23B of the control block 23. The predetermined water depth difference is the water depth difference between the water depth at the water storage facility 10 where the water level measuring device 11A is provided and the water depth at the water storage facility 10 where the water intake means 14 is provided. That is, the predetermined water depth difference is equal to the height difference α shown in FIG. The intake water level is a water level at which 90 A of water is taken in the intake means 14.

  The target water level from the control block 21, the intake water level from the node N20, and the intake downstream water level smoothed in the control block 25 are input to the second part 23B of the control block 23. In response to these inputs, the second part 23B of the control block 23 obtains the control amount of the water intake means 14 by searching the table and outputs it to the control block 24.

  The control block 24 outputs a control signal 20B to the switching device 14D according to the input control amount.

  The opening / closing device 14D changes the opening degree of the water intake means 14 based on the input control signal 20B. Thereby, the water level of the water storage facility 10 on the upstream side of the water intake means 14 and the water level of the intake path 14A on the downstream side of the water intake means 14 are respectively changed. The water storage facility 10 receives external water (for example, refer to water 90A flowing into the water storage facility 10 from the river 90 shown in FIG. 1). In addition, the amount of water flowing into the water storage facility 10 is fluctuated with time, resulting in disturbance to the water level of the water storage facility 10.

  The control block 25 receives the intake downstream water level detected by the water level measuring device 14B provided in the intake channel 14A, and smoothes and outputs the input intake downstream water level.

  The control block 22 receives the input of the stored water level detected by the water level measuring device 11A provided in the water storage facility 10, and smoothes and outputs the input stored water level.

  Subsequently, in the conventionally known dead zone type constant water level control, a water level that is a control target value (hereinafter also referred to as “target center water level”) and the four water levels (upper threshold water level, rise) selected as the target water level described above. Differences from the target water level, the lower threshold water level, and the lower target water level will be described. In addition, how to select the target water level from the above four water levels will also be described. Note that the above-mentioned “conventional dead zone type constant water level control” is a technique disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-122726, and the water level (hereinafter referred to as “dam”) of a dam or waterway by opening / closing a dam gate or intake gate. It is also a technique for performing control to maintain the water level constant.

  As shown in FIG. 8, in the conventionally known dead zone type constant water level control, the input target dam water level is the only target central water level. In addition, an upper dead zone water level was set above the target central water level, and a lower dead zone water level was set below the target central water level. Here, the water level difference LZ3 between the upper dead zone water level and the target central water level is set to be equal to the water level difference LZ2 between the target central water level and the lower dead zone water level. When the current dam water level is lower than the lower dead zone water level or higher than the upper dead zone water level, the dam gate and intake gate are opened and closed to control the dam water level to the target central water level. Is called. At this time, the control amount of opening and closing of the dam gate and intake gate is determined only at the start of the control, and the actual dam water level is at which position during the predetermined time when the water level should be changed according to this control. Regardless of whether or not there is no additional control. In addition, as the water level difference (absolute value) between the current dam water level and the target central water level is larger, the control amount for opening and closing the dam gate and the intake gate is increased.

  In the conventionally known dead zone type constant water level control as described above, in order to prevent the dam water level from falling below the ideal water level in order to ensure the maintenance flow rate, the lower dead zone water level is made higher than the ideal water level by the water level difference LZ1. There is a need. Here, in the conventionally known dead-zone type constant water level control, the accuracy of the water level such as the dam water level is about 1 [cm], for example, so that the water level difference LZ3 and the water level difference LZ2 are, for example, 25 [mm], and the water level difference LZ1. Is set as, for example, 20 [mm]. For this reason, in the conventionally known dead zone type constant water level control, it is necessary to set the target dam water level, which is the target central water level, by LZ1 + LZ2 (for example, 45 [mm]) higher than the ideal water level. It should be noted that in the conventionally known dead-zone type constant water level control, the influence of various parameters that are changed with the opening / closing control on the control result is not taken into account, so the water level data increments are further increased. Even when it is reduced, the accuracy of water level control is about 1 [cm].

  On the other hand, in the present invention, the upper threshold water level and the rising target water level that are higher than the central water level, and the lower threshold water level and the lower target water level located between the central water level and the ideal water level, Four water levels are set. Here, the rising target water level is a water level lower than the upper threshold water level, and the lowering target water level is a water level higher than the lower threshold water level.

  When the recognized water level is higher than the upper threshold water level, the opening degree of the water intake means 14 is controlled so that the lower target water level is the target water level and the recognized water level matches the target water level. . Here, the control of the opening degree of the water intake means 14 is performed only when the control amount is set at the start of the control. During the predetermined time when the water level should be changed in accordance with this control, the actual stored water level is determined. The additional control is not executed regardless of the position. Moreover, the control amount of the opening degree of the water intake means 14 is enlarged, so that the water level difference of the recognized water storage water level and a target water level is large. For this reason, when the lower target water level is set as the target water level, the control amount of the opening of the water intake means 14 is made larger than when the central water level is set as the target water level, and the stored water level is higher than the upper threshold water level. The condition is cleared sooner.

  Further, when the recognized reservoir water level is lower than the lower threshold water level, the opening degree of the water intake means 14 is controlled so that the ascending target water level is the target water level and the recognized reservoir water level is matched with the target water level. Is called. Here, when the rising target water level is set as the target water level, the control amount of the opening degree of the water intake means 14 is made larger than when the central water level is set as the target water level, and the stored water level is lower than the lower threshold water level. The low state is resolved sooner. Further, in the present invention, the accuracy of the recognized reservoir water level is determined by making the stored reservoir water level data to be controlled not the current reservoir reservoir level itself but the reservoir reservoir level that is recognized by smoothing the reservoir reservoir level. For example, about 1 [mm]. Accordingly, in the present invention, the water level difference L1 between the lower threshold water level and the ideal water level, which is necessary to prevent the stored water level from falling below the ideal water level, can be reduced to, for example, 2 [mm]. It has become.

  At this time, when the above-described fifth invention of the present invention is applied, the control amount of the opening degree of the water intake means 14 can be varied according to the control of the opening degree of the water intake means 14. Can be determined taking into account the effects that will later have on the control results. Here, the above-mentioned “various parameters” are, for example, flow coefficients that vary depending on the overflow state of the water 90A from the water storage facility 14 to the fishway 13. Thereby, for example, the accuracy of the recognized reservoir water level is increased to, for example, about 1 [mm], and the water level difference L3 between the upper threshold water level and the central water level and the water level difference L2 between the central water level and the lower threshold water level are set. For example, it can be reduced to 10 [mm]. For this reason, when the fifth invention described above is applied in the present invention, even when the central water level is lowered to a position higher than the ideal water level by L1 + L2 (for example, 12 [mm]), the stored water level falls below the ideal water level. It is possible to avoid it.

  Note that, at the initial time when one of the above-described controls is first started, the upper threshold water level is used instead of the rising target water level, and the lower threshold water level is used instead of the lowering target water level. Even in this case, since the same effect as the effect obtained by each control described above can be obtained, detailed description thereof is omitted here.

  When the recognized reservoir water level is continuously located in the area M1 between the upper threshold water level and the rising target water level for a predetermined time or more, the lower threshold water level is set as the target water level, and the recognized stored water level is set as the target. The opening degree of the water intake means 14 is controlled so as to match the water level. Thereby, when the recognized water storage water level is located at a relatively high position (for example, area M1) within the range of the dead zone, the amount of water taken by the water intake means 14 can be increased. Here, the fact that the stored water level is located in a specific area with upper and lower limits (for example, area M1) for a long period of time means that the stored water level is hardly changed. For this reason, by setting the target water level, which is the control target value in the water level control, to the lower threshold water level, the water intake by the water intake means 14 is possible while the stored water level is positioned within the dead zone. It can be increased as much as possible.

<Processing according to the second embodiment by the control means 20 (FIGS. 9 to 23)>
Subsequently, a series of steps in the processing according to the second embodiment, which is executed when the above-described computer functions as the control unit 20 by the above-described discharge flow rate adjustment program, is mainly illustrated in FIGS. 9 to 23. It demonstrates using each flowchart shown. In the following, when an error occurs including the case where data exceeding the number of elements in the prepared time series is input in this time series, various settings are stored in the above-described storage and the computer is restarted. The illustration and detailed description of ancillary steps such as steps are omitted.

  The execution of the series of steps is first executed by the computer (that is, the control means 20) in which the discharge flow rate adjusting program is started, and the control means 20 proceeds to step B10 shown in FIG.

  In step B10, the control means 20 accesses the storage (not shown), acquires data recorded in advance in the storage, performs initial settings necessary for executing the following steps, and performs step B20. Proceed to

  In step B20, the control means 20 acquires a detection signal 14C emitted at a predetermined sampling period from the water level measurement device 14B connected in advance to the control means 20, and from the detection signal 14C, at the installation location of the water level measurement device 14B. Get the current water level. Here, as shown in FIG. 3, the water level measuring device 14B is installed at the bottom downstream of the intake means 14 by the distance L described above in the intake channel 14A, and the intake water is based on the height of the bottom. The water level of the path 14A is detected at a predetermined sampling period and a detection signal 14C is output. That is, the water level acquired in step B20 is the water level h shown in FIG. 3, and is also referred to as “intake downstream water level” in this specification. In step B20, the control means 20 is in an input waiting state (not shown) until a new detection signal 14C is issued from the water level measuring device 14B, so that when the water level measuring device 14B measures the water level. The water level is obtained as the downstream water level.

  By the way, the water level output from the water level measuring device 14B as the detection signal 14C is an instantaneous water level and a signal level with a poor signal-to-noise ratio. For this reason, the control means 20 performs step B22 (refer FIG. 9) which preserve | saves this intake downstream water level as time series in the storage (illustration omitted) mentioned above after acquisition of the intake downstream water level by step B20. And the control means 20 calculates the moving average of the intake downstream water level by averaging each intake downstream water level stored in the storage in the latest predetermined time range, and smoothes the intake downstream water level obtained by smoothing the calculation result. Step B24 (see FIG. 9) recognized as h is executed, and the process proceeds to step B30. According to step B22 and step B24, the water level having a poor signal-to-noise ratio obtained from the detection signal 14C is smoothed by a moving average, so that the noise component included in the detection signal 14C has an adverse effect on the control by the control means 20. Can be reduced.

  In step B30, the control means 20 obtains a detection signal 11B issued at a predetermined sampling period from the water level measurement device 11A connected in advance to the control means 20, and from the detection signal 11B at the installation location of the water level measurement device 11A. Acquire the current water level as the reservoir water level. Here, as shown in FIGS. 2 and 3, the water level measurement device 11 </ b> A determines the water level of the water 90 </ b> A that is stored upstream of the water intake means 14 in the water storage facility 10 as the sampling period of the water level measurement device 14 </ b> B. The detection signal 11B is output by detecting at the synchronized sampling period. The water level measuring device 11A is installed in contact with the bottom of the water storage facility 10, detects the water level of the water storage facility 10 based on the height of the bottom, and outputs a detection signal 11B. . Moreover, in step B30, the control means 20 acquires the detection signal 11B emitted from the water level measurement device 11A without waiting for input, so that the water level when the water level measurement device 14B measures the water level is the stored water level. Get as.

  By the way, the water level output from the water level measuring device 11A as the detection signal 11B is an instantaneous water level and a signal level with a poor signal-to-noise ratio. For this reason, the control means 20 progresses to step B32 after acquisition of the stored water level by step B30.

  In step B32, the control means 20 saves this stored water level in the storage (not shown) as time series data (see FIG. 9), and proceeds to step B34.

  In step B34, the control means 20 calculates the moving average of the water level by averaging the water levels stored in the storage in the most recent predetermined time range, and recognizes this calculation result as a smoothed water level. Then, the process proceeds to Step B36. According to step B32 and step B34, the noise component contained in the detection signal 11B affects the control by the control means 20 by smoothing the reservoir level obtained from the detection signal 11B with a poor signal-to-noise ratio by moving average. It is possible to reduce adverse effects. In addition, the step which combined each step from step B30 to step B34 is also called the "water level recognition step" below.

  In step B36, the control means 20 prepares the stored water level that has been smoothed and recognized by the control means 20 in the repeatedly executed water level recognition step, as time series data corresponding to the time at which the recognition was performed, Proceed to step B40. That is, step B36 corresponds to the “time-series data preparation step” in the present invention.

  In step B40, the control means 20 extracts a water level minimum value and a water level maximum value, which will be described later, from the smoothed time series data of the stored water level in a form corresponding to the time, and proceeds to step B50. Here, the minimum water level is the smoothed water level when the fluctuation of the smoothed water level is switched from lowering to rising. The maximum water level is the smoothed water level when the fluctuation of the smoothed water level switches from rising to lowering. That is, Step B40 corresponds to the “extraction step” in the present invention.

In step B50, the control means 20 refers to the data stored in the storage and determines whether or not it can be said that a predetermined time has not elapsed since the opening of the water intake means 14 was last adjusted. Here, the predetermined time is opened or closed time intake means 14 is required to adjust the degree of opening a ₁ and (for example, several seconds to tens of seconds), the water level of water 90A is changed by adjusting the opening a ₁ Thus, it is a time that is combined with a rest time (for example, about several minutes) required until the water intake is adjusted. When the control means 20 determines “No” (that is, when data indicating that the opening degree of the water intake means 14 has been adjusted after a predetermined time has not been found in the storage), as shown in FIG. Proceed to step B52. Here, the specific process of step B52 will be described later. Further, when the control means 20 determines “Yes” (that is, when the opening of the water intake means 14 is adjusted after the predetermined time is stored in the storage), as shown in FIG. Proceed to step B70.

  In step B <b> 70, the control unit 20 determines whether or not a stop command for stopping the control unit 20 is input to the control unit 20. When it is determined as “Yes” (that is, when the stop instruction is input), the control unit 20 executes the shutdown process after terminating all the processes currently being executed. The stop command is appropriately input from the outside of the control means 20 by a human hand. The stop command is input, for example, when the water intake unit 14 takes water 90A and stops the operation of the hydroelectric power generation facility 10A and performs maintenance of the hydroelectric power generation facility 10A (not shown).

  When the control means 20 determines in step B70 that the stop command has not been issued (that is, “No”), the control means 20 returns to step B20. As a result, the control unit 20 repeatedly executes a plurality of steps except for the above-described step B10 as long as the stop command is not input to the control unit 20. The plurality of steps includes a water level recognition step, a water level lowering control step, and a water level raising control step in the present invention.

  In each of step B52, step B54, and step B56, the control means 20 determines the smoothed reservoir water level recognized in step B34 executed this time (that is, the latest data of the smoothed reservoir water level). To do. This determination is to determine which of the water level area 1, the water level area 2, the water level area 3, and the water level area 4, which will be described later, is the latest data of the smoothed stored water level. In the present embodiment, as shown in FIG. 6, each water level area has the above-described central water level, an upper threshold water level set in advance as a water level higher than the central water level, and a water level lower than the central water level. The lower threshold water level set in advance is set as a threshold value.

Here, the upper threshold water level is a dead zone water level area that is set above and below the central water level in order to prevent the hunting phenomenon in the adjustment of the opening degree a ₁ of the water intake means 14 (in the present specification, “near the central water level”). It is also the highest water level. The lower threshold water level is the lowest water level in the dead zone water level area. Moreover, the said lower side threshold water level is set as a water level higher than the ideal water level mentioned above.

  The water level area 1 is set in advance as a water level area whose water level is higher than the upper threshold water level. The water level area 4 is set in advance as a water level area whose water level is lower than the lower threshold water level. The water level area 2 is set in advance as a water level area whose water level is lower than the upper threshold water level and higher than the central water level. The water level area 3 is set in advance as a water level area where the water level is not less than the lower threshold water level and not more than the central water level.

  That is, in step B <b> 52, the control means 20 determines whether or not the latest data of the smoothed stored water level is located in the water level area 1. When it is determined “Yes”, the control unit 20 proceeds to Step B80, and when it is determined “No”, the control unit 20 proceeds to Step B54.

  In step B54, the control means 20 determines whether or not the latest data of the smoothed reservoir water level is located in the water level area 4. If it is determined as "Yes", the control unit 20 proceeds to step B80, and determines "No". When it determines, it progresses to step B56.

  In step B56, the control means 20 determines whether or not the latest data of the smoothed reservoir water level is located in the water level area 3. If it is determined "Yes", the control unit 20 proceeds to step B70 described above, "", The process proceeds to step B58. As is clear from the description of each water level area, the processing by the control means 20 proceeds to step B58 when the latest data of the smoothed water storage water level is located in the water level area 2. .

<When the latest data of the smoothed reservoir water level is located in the water level area 1 or the water level area 4>
In each step from step B52 to step B56, when it is determined that the latest data of the smoothed stored water level is in the water level area 1 or the water level area 4 (see FIG. 6), as described above, the control means 20 Advances to step B80.

  In step B80, the control means 20 makes a condition determination (hereinafter also referred to as "condition determination Z") set according to Table 1 shown below, and the subsequent processing pattern is branched according to the determination result of the condition determination Z. Let This condition determination Z is for determining whether the control state of the stored water level from the past to the present is changed, and whether or not each of the following priority condition 1, priority condition 2, and priority condition 3 is satisfied. .

  Here, Table 1 will be described. In the discharge flow rate adjustment program of the present embodiment, the control unit 20 reads the conditions for some of the conditions described in Table 1 above. Specifically, the “current control state” described in Table 1 is “the determination result as to how the control means 20 will control the water level in the condition determination Z currently being executed”. Is read as In addition, “the control for increasing the water level” described in Table 1 above is “the control means 20 indicates that the control for increasing the water level should be performed because the smoothed stored water level is in the water level area 4”. The information indicating that the judgment has been made has been found. In addition, “the control that lowers the water level” described in Table 1 above is “the control means 20 indicates that the control should be performed to lower the water level because the smoothed stored water level is in the water level area 1”. The information indicating that the judgment has been made has been found. In addition, “the control is not executed” described in Table 1 above is “the control of the water level should be performed because the smoothed stored water level is in either the water level area 1 or the water level area 4”. "The information indicating that the control means 20 has determined is not found." That is, the control means 20 performs the control for the water level executed when the smoothed stored water level is in the water level area 2 (see the adjustment control in Step B66 described later) in Table 1 “from the past to the present. Is excluded from the “control state leading to”.

  Next, how to read Table 1 by taking as an example the case where all the control states from the previous three times to this time are “execution of control for lowering the water level” (in the case of Table 1, the row number is 15) Will be explained. In the above row, pattern 4 decreases in the column when priority condition 1 is satisfied, pattern 7 decreases in the column when priority condition 3 is satisfied, and pattern 3 decreases in the column when priority condition 2 is satisfied or in the column where priority order is not specified. Are described to apply. In this case, the control unit 20 determines the priority conditions 1, the priority conditions 2, and the priority conditions 3 after determining each control state from three times before this time.

  When the priority condition 1 is satisfied, the control unit 20 executes a process corresponding to the pattern 4 decrease (see FIG. 16). Moreover, when the priority condition 2 is satisfied, the control unit 20 executes a process corresponding to the pattern 3 decrease (see FIG. 14). When the priority condition 3 is satisfied, the control unit 20 executes a process corresponding to the pattern 7 (see FIG. 22). Further, when none of the priority condition 1, the priority condition 2, and the priority condition 3 is satisfied, the control unit 20 executes a process corresponding to the pattern 3 decrease (see FIG. 14). The specific processing of each pattern that is branched and processed by the condition determination Z will be described later.

  Specific contents of each of the priority condition 1, the priority condition 2, and the priority condition 3 are shown in Table 2 below. Here, the fifth water level difference is a water level difference between the latest minimum water level value and the target water level to be lowered. The sixth water level difference is a water level difference between the latest water level maximum value and the rising target water level. The seventh water level difference is a water level difference between the latest data of the smoothed water storage water level and the target water level to be lowered. Further, the eighth water level difference is a water level difference between the latest data of the smoothed stored water level and the target water level for increase. In the process according to the first embodiment of the present invention described with reference to the control block diagram of FIG. 7, the seventh water level difference and the eighth water level difference are changed from the node N10 to the first of the control block 23. This is applied in place of the deviation output to the unit 23A. In the present specification, the first water level difference is a water level difference obtained by subtracting the target water level from the latest minimum water level, and the second water level difference is the current condition determination Z (step B80 in FIG. 9). ) Is the level difference obtained by subtracting the lower target water level from the smoothed reservoir water level used in). The third water level difference is the water level difference obtained by subtracting the latest water level maximum from the target level for the rise. The fourth water level difference is a water level difference obtained by subtracting the smoothed water storage water level used in the current condition determination Z (step B80 in FIG. 9) from the rising target water level.

  In Table 2, the water level minimum value and the water level maximum value are extracted in the above-described step B40, and it can be seen whether or not they are the latest by the corresponding time. Further, as shown in FIG. 6, the target water level to be lowered is a water level that is higher than the lower threshold water level in the above-described dead zone water level area and lower by a second predetermined value that is a positive value than the above-described central water level. Is set. This second predetermined value is a value of about 7 [mm], for example. Further, the rising target water level is set as a water level that is lower than the upper threshold water level and higher than the central water level by a first predetermined value in the dead zone water level area shown in FIG. The first predetermined value is smaller than the second predetermined value (for example, 2 [mm]).

  Further, the third predetermined value shown in Table 2 causes the control means 20 to determine whether or not it is necessary to change the stored water level correction amount described later, depending on the magnitude of the absolute value of the fifth water level difference or the sixth water level difference. It is a threshold for. That is, the control means 20 determines that there is no need to change the stored water level correction amount described later when the absolute value of the fifth water level difference or the sixth water level difference is smaller than the third predetermined value. Here, the “reserved water level correction amount” is a parameter for calibrating the actually recognized smoothed stored water level to a smoothed stored water level that allows more appropriate control. This stored water level correction amount is initially set in step B10 so that its value becomes 0 (that is, a value at which the smoothed stored water level is not calibrated at all). In this specification, the term “calibration” refers to a deviation between an ideal output that gives an ideal control amount in this control and an actual output of the measurement device when performing control based on the output of the measurement device. And the output of the actual measuring device is corrected to the ideal output.

  The coefficient R is the minimum value of the absolute values of the seventh water level difference and the eighth water level difference (that is, the water level difference between the upper threshold water level and the lowering target water level and the water level difference between the lower threshold water level and the rising target water level, FIG. Based on the reference), the seventh water level difference and the eighth water level difference are always set to be larger than the third predetermined value. For this reason, any one of the priority condition 1, the priority condition 2, and the priority condition 3 can be satisfied (in the case of Table 1, the row number is any one of 7, 14, 15, 22, 23, and 30). In this case, none of the above conditions can be satisfied. Note that, in the discharge flow rate adjustment program of the present embodiment, the value of the coefficient R is set to, for example, 0.1 in step B1 (see FIG. 9).

  Subsequently, the control state before 3 times and 2 times before are both “control is not executed”, and the control state before 1 time and this time are both “control that raises the water level was executed” (Table In the case of 1, the case where the minute number is 6) will be described as an example, and a supplementary explanation about how to read Table 1 will be given. The above row only describes that pattern 2 ascending is applied to a column for which no priority order is specified. In this case, since it is clear that none of the priority conditions 1, priority conditions 2, and priority conditions 3 shown in Table 2 is satisfied, the control means 20 has the control state of each control state from three times before this time. After making the determination, the processing corresponding to the pattern 2 rise (see FIG. 13) is executed as it is.

  As shown in FIG. 9, when the branch processing for each pattern following the condition determination Z is completed, the control means 20 advances the processing to step B70 described above. In the present specification, all processes executed by the control unit 20 in a state where the process of the control unit 20 has not progressed to any of the branch processes of the respective patterns are collectively referred to as “initial process”. Is also referred to.

<When the latest data of the smoothed reservoir water level is in the water level area 2>
In each step from step B52 to step B56, when it is determined that the latest data of the smoothed stored water level is in the water level area 2 (see FIG. 6), the processing by the control means 20 is performed as described above. Proceed to B58. In this step B58, the control means 20 refers to the time series data of the smoothed reservoir water level stored in the above-mentioned step B36, and whether the smoothed reservoir water level remains in the water level area 2 for a predetermined time or more. Determine whether or not.

  As shown in FIG. 9, in step B58, the control means 20 proceeds to step B60 if it determines “Yes”, and proceeds to step B70 described above if it determines “No”.

  In step B60 shown in FIG. 9, the control means 20 outputs the current value of the stored water level correction amount to the storage (not shown) as a saved value O and backs it up. And the control means 20 progresses to step B62.

  In Step B62, the control means 20 resets the current value of the above-mentioned stored water level correction amount so that the stored water level correction amount does not exhibit the function of calibrating the smoothed stored water level. And the control means 20 progresses to step B64.

In step B64, the control means 20 sets a target water level, which will be described later, to the above-described lower threshold water level, and advances the process to step B66. This step B66 calls the subroutine 1 shown in FIG. 23, and is a step that proceeds to step B68 after performing adjustment control to increase the intake amount of the water 90A from the intake means 14 to the intake passage 14A. It said modulation control, in the discharge amount adjusting program of the present embodiment, the opening for adjusting the opening a ₁ water intake means 14 outputs a control signal 20B shown in FIGS. 2 and 3 from the control means 20 to the closing device 14D The degree adjustment step (step S60 in FIG. 23) is executed. However, specific processing in the adjustment control will be described later, and detailed description thereof will be omitted here. In the present specification, the “target water level” refers to a water level that is a control target value in the control of the water level of the water 90 </ b> A stored in the water storage facility 10.

  According to each step described above, it can be determined in step B58 whether or not the state where the water level of the water storage facility 10 is located in the relatively high water level area 2 within the range of the dead zone described above continues for a long period of time. . And according to each step mentioned above, when the water level of the water storage facility 10 is located in the water level area 2 for a long period of time, the water intake amount of the water 90A by the water intake means 14 can be increased. Here, the fact that the water level of the water storage facility 10 has been located in the water level area 2 for a long period of time means that the water level of the water storage facility 10 is hardly changed. For this reason, by setting the target water level, which is the control target value in the control of the water level, to the lower threshold water level, water intake of the water 90A by the water intake means 14 is performed while the water level of the water storage facility 10 is positioned within the dead zone. The amount can be increased as much as possible. Further, according to the above-described step B62, the control of the water level executed when the smoothed stored water level is in the water level area 2, the “control state from the past to the present” in Table 1 described above is included in this control. The influence can be avoided.

  As shown in FIG. 9, in step B68, the control means 20 acquires a stored value O that is the value of the stored water level correction amount backed up in the storage (not shown) in step B60. Subsequently, the control means 20 restores the stored water level correction amount reset at step B62 to the stored value O, and proceeds to step B70 described above. According to step B60 and step B68, it is possible to avoid the influence of the reset of the stored water level correction amount performed in step B62 described above extending to the processing of each step executed after step B68.

<When it is determined in the condition determination Z that the pattern 1 decreases (FIG. 10)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the process proceeds to decrease in pattern 1, the control means 20 proceeds to step S1D30 as shown in FIGS.

  In step S1D30, the control means 20 sets the target water level to the above-described lower threshold water level, and proceeds to step S1D32.

In step S1D32, the control means 20 calls subroutine 1 shown in FIG. 23, adjusts and controls the intake amount of water 90A from the intake means 14 to the intake path 14A, and proceeds to step S1D34. This adjustment control of the decrease in pattern 1 is executed when the smoothed reservoir water level is in the water level area 1 (see FIG. 6) higher than the upper threshold water level set in advance as a water level higher than the central water level. It is. In addition, the adjustment control for reducing the pattern 1 reduces the water level of the water 90 </ b> A stored in the water storage facility 10 by adjusting the opening degree a ₁ of the water intake means 14 to increase the water intake amount of the water intake means 14. In this control, the water level becomes the lower threshold water level. That is, the step obtained by combining step S1D30 and step S1D32 corresponds to the “water level lowering control step” in the present invention except for the difference between the “lower threshold water level” and the “lower target water level”. Note that specific processing in the adjustment control will be described later, and detailed description thereof will be omitted here.

  In step S1D34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S1D32 (ie, step S60 in FIG. 23) and the attempt to lower the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

According to the above steps, when the inflow amount of water 90A in the river 90 is increased and the water level of the water storage facility 10 rises, the intake means 14 is opened so that the water level of the water storage facility 10 is lowered to the target water level. The degree a ₁ is adjusted, and the amount of water taken from the water intake means 14 is increased. In this case, the target water level, by being set as a level lower than the center level, and the opening a ₁ water intake means 14 is larger, thereby realizing the lowering of the water level in the water storage facility 10 more rapidly . This reduces the amount of water 90A that flows over the maintenance flow rate in the river 90 while dealing with an increase in the inflow amount of water 90A into the water storage facility 10, and takes a larger amount of water 90A from the water intake means 14. Water can be taken. In addition, by setting the target water level to the lower threshold water level, it is possible to avoid overlooking the possibility that the target water level can be lowered while the target water level is positioned in the vicinity of the central water level. It becomes.

<When it is determined in the condition determination Z that the pattern 1 is going to rise (FIG. 11)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the process proceeds to increase in pattern 1, the control means 20 proceeds to step S1U30 as shown in FIGS.

  In step S1U30, the control means 20 sets the above-described target water level to the above-described upper threshold water level, and proceeds to step S1U32.

In step S1U32, the control means 20 calls subroutine 1 shown in FIG. 23, adjusts and controls the intake amount of water 90A from the intake means 14 to the intake path 14A, and proceeds to step S1U34. The adjustment control of the pattern 1 rise is executed when the smoothed water storage water level is in the water level area 4 (see FIG. 6) lower than the lower threshold water level set in advance as a water level lower than the central water level. Is. Further, the adjustment control for increasing the pattern 1 increases the water level of the water 90 </ b> A stored in the water storage facility 10 by adjusting the opening degree a <b> ₁ of the water intake means 14 to reduce the water intake amount of the water intake means 14. In this control, the water level becomes the upper threshold water level. That is, the step combining step S1U30 and step S1U32 corresponds to the “water level raising control step” in the present invention, except for the difference between the “upper threshold water level” and the “rising target water level”. Note that specific processing in the adjustment control will be described later, and detailed description thereof will be omitted here.

  In step S1U34, the control means 20 associates the start time of the current adjustment control in step S1U32 (ie, step S60 in FIG. 23) with the attempt to raise the water level at this time (not shown). ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

According to the above steps, when the inflow of water 90A in the river 90 is reduced and the water level of the water storage facility 10 is lowered, the intake means 14 is opened so that the water level of the water storage facility 10 is raised to the target water level. The degree a ₁ is adjusted to secure the water flow rate of the river 90. In this case, the target water level, by being set as a higher level than the central level, by the opening a ₁ water intake means 14 is smaller, to achieve raising the water level in the water storage facility 10 more rapidly. Accordingly, it is possible to cope with a decrease in the inflow of water 90A into the water storage facility 10 while ensuring the maintenance flow rate of the river 90, and the water level setting of the river 90 is lowered to reduce the minimum water flow rate of the river 90. It is possible to narrow down and increase the flow rate of water that can be taken from the river 90. Further, by setting the target water level to the upper threshold water level, it is possible to avoid overlooking the possibility that the target water level can be made higher while the target water level is positioned in the vicinity of the central water level.

<When it is determined in the condition determination Z that the pattern 2 will be lowered (FIG. 12)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the process proceeds to decrease in pattern 2, the control unit 20 proceeds to step S2D10 shown in FIG.

  In step S2D10, the control means 20 calculates | requires the 1st water level difference which is a water level difference which pulled the fall target water level from the newest water level minimum value extracted in step B40 shown in FIG. And the control means 20 progresses to step S2D12. In the discharge flow rate adjustment program of the present embodiment, the water level minimum value is extracted from the time series data of the stored water level that is smoothed and recognized in the above-described water level recognition step (see FIG. 9). For this reason, the latest minimum water level value used for obtaining the first water level difference in the discharge flow rate adjustment program of the present embodiment is the smoothed stored water level after the adjustment control executed once before. It can be regarded as the lowest water level.

  In step S2D12, the control means 20 changes the value of the stored water level correction amount to the value of the first water level difference obtained in the immediately preceding step S2D10, and proceeds to step S2D14.

In step S2D14, the control means 20, the product obtained by multiplying the coefficients _{U 1} to the first level difference determined in this step S2D10 determined as a correction amount Y of water level correction amount, the process proceeds to step S2D16. Here, the coefficient U ₁ is the second water level difference obtained by subtracting the target water level from the smoothed water storage level used in the current condition determination Z (step B80 in FIG. 9), and the current step S2D10. This is a coefficient set by the control means 20 in step S2D14 based on the obtained first water level difference. Specifically, when the first water level difference is a relatively large positive value (for example, 0.2 or more times the second water level difference), the control unit 20 sets the coefficient U ₁ to 1. Set. When the first water level difference is a relatively small positive value (for example, less than 0.2 times the second water level difference), the control means 20 sets the coefficient U ₁ to a positive value smaller than _1. By setting the value to (for example, 0.5), a fine calibration of the smoothed reservoir water level by the reservoir water level correction amount is realized. When the first water level difference is a negative value (in other words, when the smoothed stored water level overshoots the lower target water level), the control means 20 sets the coefficient U ₁ to −1. A smaller value (for example, -1.5) is set. Thereby, the control means 20 implement | achieves calibrating the said smoothed water storage water level to the water level which makes it possible to remove | deviate from the said overshoot rapidly.

  In step S2D16, the control means 20 stores the correction amount Y of the stored water level correction amount obtained in step S2D14 in the storage (not shown) as the storage correction amount X, and proceeds to step S2D18.

  In step S2D18, the control means 20 corrects the stored water level correction amount by adding the correction amount Y of the stored water level correction amount obtained in step S2D14 to the stored water level correction amount changed in step S2D12. Proceed to S2D30.

  In step S2D30, the control unit 20 sets the above-described target water level to the above-described reduced target water level, and proceeds to step S2D32.

In step S2D32, the control means 20 calls the subroutine 1 shown in FIG. 23, and adjusts and controls the intake amount of the water 90A from the intake means 14 to the intake path 14A. This adjustment control of the decrease in pattern 2 is executed when the smoothed reservoir water level is in the water level area 1 (see FIG. 6) higher than the upper threshold water level set in advance as a water level higher than the central water level. It is. In addition, the adjustment control for decreasing the pattern 2 reduces the water level of the water 90 </ b> A stored in the water storage facility 10 by adjusting the opening degree a ₁ of the water intake means 14 to increase the water intake amount of the water intake means 14. This control is performed so that the water level becomes the target water level to be lowered. That is, the step combining step S2D30 and step S2D32 corresponds to the “water level lowering control step” in the present invention. Note that specific processing in the adjustment control will be described later, and detailed description thereof will be omitted here. Further, the control means 20 proceeds to step S2D34 after the adjustment control.

  By the way, as shown in Table 1, the condition determined to proceed to decrease of pattern 2 in the condition determination Z is that the control for decreasing the water level executed once before is repeated this time, and the number of repetitions is one or more times. Including the condition that it is known that For this reason, the conditions under which a series of steps from step S2D10 to step S2D18 are executed correspond to “first condition setting” in the present invention. Further, according to a series of steps from step S2D10 to step S2D18, the stored water level correction amount is corrected based on the water level difference between the latest minimum water level value and the target water level to be lowered before the water level lowering control step. . For this reason, a series of steps from step S2D10 to step S2D18 corresponds to the “correction step” and the “first selection process” in the present invention.

  In step S2D34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S2D32 (that is, step S60 in FIG. 23) and the attempt to lower the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

<When it is determined in the condition determination Z that the pattern 2 increases (FIG. 13)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the pattern 2 increases, the control unit 20 proceeds to step S2U10 shown in FIG.

  In step S2U10, the control means 20 obtains a third water level difference, which is a water level difference obtained by subtracting the latest water level maximum value extracted in step B40 shown in FIG. 9 from the rising target water level, and proceeds to step S2U12. In the discharge flow rate adjustment program of the present embodiment, the water level maximum value is extracted from the time series data of the stored water level that has been smoothed and recognized in the above-described water level recognition step (see FIG. 9). For this reason, the latest water level maximum value used for obtaining the third water level difference in the discharge flow rate adjustment program of the present embodiment is the smoothed stored water level after the adjustment control executed once before. It can be regarded as the highest water level.

  In step S2U12, the control means 20 changes the value of the stored water level correction amount to the value of the third water level difference obtained in the immediately preceding step S2U10, and proceeds to step S2U14.

In step S2U14, the control means 20, the product obtained by multiplying the coefficients _{U 2} to the third level difference determined in this step S2U10 determined as a correction amount Y of water level correction amount, the process proceeds to step S2U16.

Incidentally, the coefficient U ₂ is obtained in this condition judgment Z fourth level difference and the immediately preceding step S2U10 minus the water level smoothed used from the raised target level (Step B80 in FIG. 9) Based on the third water level difference, this is a coefficient set by the control means 20 in step S2U14. Specifically, when the third water level difference is a relatively large positive value (for example, 0.2 or more times the fourth water level difference), the control means 20 sets the coefficient U ₂ to 1. Set. Moreover, (the example 0.2 times less than the fourth water level difference) the third water level difference is relatively small if a positive value, the control means 20, a small positive than 1 the coefficients U ₂ By setting the value to (for example, 0.5), a fine calibration of the smoothed reservoir water level by the reservoir water level correction amount is realized. Further, when the third water level difference is a negative value (in other words, when the smoothed reservoir water level overshoots the rising target water level), the control means 20 sets the coefficient U ₂ to −1. A smaller value (for example, -1.5) is set. Thereby, the control means 20 implement | achieves calibrating the said smoothed water storage water level to the water level which makes it possible to remove | deviate from the said overshoot rapidly.

  In step S2U16, the control means 20 stores the correction amount Y of the stored water level correction amount obtained in step S2U14 in the storage (not shown) as the storage correction amount X, and proceeds to step S2U18.

  In step S2U18, the control means 20 corrects the stored water level correction amount by adding the corrected amount Y of the stored water level correction amount obtained in step S2U14 to the stored water level correction amount changed in step S2U12. Proceed to S2U30.

  In step S2U30, the control means 20 sets the above-described target water level to the above-described rising target water level, and proceeds to step S2U32.

In step S2U32, the control means 20 calls the subroutine 1 shown in FIG. 23, and adjusts and controls the intake amount of the water 90A from the intake means 14 to the intake path 14A. The adjustment control of the pattern 2 rise is executed when the smoothed water storage water level is in the water level area 4 (see FIG. 6) lower than the lower threshold water level set in advance as a water level lower than the central water level. Is. Further, the adjustment control for increasing the pattern 2 increases the water level of the water 90 </ b> A stored in the water storage facility 10 by adjusting the opening degree a ₁ of the water intake means 14 to reduce the water intake amount of the water intake means 14. In this control, the water level is set to the rising target water level. That is, the step combining step S2U30 and step S2U32 corresponds to the “water level elevation control step” in the present invention. Note that specific processing in the adjustment control will be described later, and detailed description thereof will be omitted here. Moreover, the control means 20 progresses to step S2U34 after the said adjustment control.

  By the way, as shown in Table 1, the condition determined to advance to the pattern 2 increase in the condition determination Z is that the control for increasing the water level executed one time before is repeated this time, and the number of repetitions is one or more times. Including the condition that it is known that For this reason, the conditions under which the series of steps from step S2U10 to step S2U18 described above are executed correspond to “second condition setting” in the present invention. Further, according to the series of steps from step S2U10 to step S2U18, the correction of the stored water level correction amount is performed based on the water level difference between the latest water level maximum value and the rising target water level before the above-described water level increase control step. Done. Therefore, a series of steps from step S2U10 to step S2U18 corresponds to the “correction step” and the “second selection process” in the present invention.

  In step S2U34, the control means 20 associates the start time of the current adjustment control in step S2U32 (that is, step S60 in FIG. 23) with the attempt to raise the water level at this time (not shown). ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

<When it is determined in the condition determination Z that the process proceeds to decrease in pattern 3 (FIG. 14)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the process proceeds to decrease in pattern 3, the control unit 20 proceeds to step S3D10 shown in FIG.

  In step S3D10, the control means 20 calculates | requires the 1st water level difference which pulled the fall target water level from the newest water level minimum value extracted in step B40 shown in FIG. 9, and progresses to step S3D14.

In step S3D14, the control means 20, the product obtained by multiplying the coefficients _{U 1} to the first level difference determined in step S3D10 immediately preceding calculated as the correction amount Y of water level correction amount, the process proceeds to step S3D16. Here, the coefficient U ₁ is the second water level difference obtained by subtracting the target water level from the smoothed water storage level used in the current condition determination Z (step B80 in FIG. 9), and the immediately preceding step S3D10. This is a coefficient set by the control means 20 in step S3D14 based on the obtained first water level difference. Note that the method for setting the specific value of the coefficient U ₁ is the same as the method described in step S2D14 in FIG.

  In step S3D16, the control means 20 stores the stored water level correction amount correction amount Y obtained in step S3D14 in the storage (not shown) as the storage correction amount X, and proceeds to step S3D18.

  In step S3D18, the control means 20 corrects the stored water level correction amount by adding the correction amount Y of the stored water level correction amount obtained in step S3D14 to the current stored water level correction amount, and proceeds to step S3D30.

  In step S3D30, the control means 20 sets the above-described target water level to the above-described reduced target water level, and proceeds to step S3D32.

  The processing in step S3D32 is the same as the adjustment control in step S2D32 in FIG. Here, the step combining step S3D30 and step S3D32 corresponds to the “water level lowering control step” in the present invention. The control means 20 proceeds to step S3D34 after the adjustment control.

  By the way, as shown in Table 1, the condition determined to proceed to decrease in pattern 3 in the condition determination Z is that the control for lowering the water level executed once before is repeated this time, and the number of repetitions is one or more times. Including the condition that it is known that Further, according to a series of steps from step S3D10 to step S3D18, the stored water level correction amount is corrected based on the water level difference between the latest minimum water level value and the target water level to be lowered before the water level lowering control step. . That is, a series of steps from step S3D10 to step S3D18 corresponds to the “correction step” and the “first selection process” in the present invention. The conditions under which a series of steps from step S3D10 to S3D18 are executed correspond to “first condition setting” in the present invention.

  In step S3D34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S3D32 (ie, step S60 in FIG. 23) and the attempt to lower the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

<When it is determined in the condition determination Z that the pattern 3 increases (FIG. 15)>
If it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the pattern 3 is to be increased, the control means 20 proceeds to step S3U10 shown in FIG.

  In step S3U10, the control means 20 obtains a third water level difference, which is a water level difference obtained by subtracting the latest water level maximum value extracted in step B40 shown in FIG. 9 from the rising target water level, and proceeds to step S3U14.

In step S3U14, the control means 20, the third product obtained by multiplying the coefficients _{U 2} to level differences determined in step S3U10 immediately preceding calculated as the correction amount Y of water level correction amount, the process proceeds to step S3U16. Here, the coefficient U ₂ is determined in this condition judgment Z fourth level difference and the immediately preceding step S3U10 minus the water level smoothed used from the raised target level (Step B80 in FIG. 9) The coefficient set by the control means 20 in step S3U14 based on the third water level difference. Note that the method for setting the specific value of the coefficient U ₂ is the same as the method described in the process of step S2U14 in FIG.

  As shown in FIG. 15, in step S3U16, the control means 20 stores the stored water level correction amount correction amount Y obtained in step S3U14 as a storage correction amount X in a storage (not shown), and proceeds to step S3U18. .

  In step S3U18, the control means 20 corrects the stored water level correction amount by adding the correction amount Y of the stored water level correction amount obtained in step S3U14 to the stored water level correction amount changed in step S3U12. Proceed to step S3U30.

  In step S3U30, the control means 20 sets the above-described target water level to the above-described rising target water level, and proceeds to step S3U32.

  The processing in step S3U32 is the same as the adjustment control in step S2U32 in FIG. Here, the step combining step S3U30 and step S3U32 corresponds to the “water level rise control step” in the present invention. In addition, the control means 20 progresses to step S3U34 after the said adjustment control.

  By the way, as shown in Table 1, the condition determined to proceed to the pattern 3 increase in the condition determination Z is that the control for increasing the water level executed one time before is repeated this time, and the number of repetitions is one or more times. Including the condition that it is known that For this reason, the conditions under which the series of steps from step S3U10 to step S3U18 described above are executed correspond to the “second condition setting” in the present invention. Further, according to the series of steps from step S3U10 to step S3U18, the correction of the stored water level correction amount is performed based on the water level difference between the latest water level maximum value and the rising target water level before the above-described water level increase control step. Done. Therefore, a series of steps from step S3U10 to step S3U18 corresponds to the “correction step” and the “second selection process” in the present invention.

  In step S3U34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S3U32 (that is, step S60 in FIG. 23) and the attempt to raise the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

<When it is determined in the condition determination Z that the pattern 4 will be lowered (FIG. 16)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the process proceeds to decrease in pattern 4, the control unit 20 proceeds to step S4D10 shown in FIG.

  In step S4D10, the control means 20 calculates | requires the 1st water level difference which subtracted the fall target water level from the newest water level minimum value extracted in step B40 shown in FIG. 9, and progresses to step S4D12. In step S4D12, the control means 20 backs up the current value of the stored water level correction amount to the storage (not shown), and proceeds to step S4D14.

In step S4D14, the control means 20, the product obtained by multiplying the coefficients _{U 1} to the first level difference determined in this step S4D10 determined as a correction amount Y of water level correction amount, the process proceeds to step S4D18. The coefficient U ₁ is obtained in this condition judgment Z second level difference and this step S4D10 minus the reduction target water level from the water level smoothed used in (step B80 in FIG. 9) Based on the first water level difference, this is a coefficient set by the control means 20 in step S4D14. Note that the method for setting the specific value of the coefficient U ₁ is the same as the method described in step S2D14 in FIG.

  In step S4D18, the control means 20 corrects the stored water level correction amount by adding the correction amount Y of the stored water level correction amount obtained in step S4D14 to the current stored water level correction amount, and proceeds to step S4D20. .

In step S4D20, the control means 20, the storage with reference to the stored in the (not shown) data, execution start time t ₁ of the drawdown control steps executed twice before and the water level performed before once get the time interval between the execution start time t ₂ of the reduction control step as the interval T ₁ first time, the process proceeds to step S4D22. That is, step S4D20 corresponds to the “first time interval acquisition step” in the present invention. The relationship between the first time interval T ₁ acquired in the first time interval acquisition step and the above t ₁ and t ₂ is as shown in FIG.

In step S4D22, the control means 20, the storage with reference to the data stored in the (not shown), the water level once the execution start time t ₂ of the drawdown control steps executed before will be repeated this the time interval between times t ₃ is expected to decrease the control step is started performed to estimate the second time interval T _2, the process proceeds to step S4D24. That is, step S4D22 corresponds to the “second time interval estimation step” in the present invention. The relationship between the second time interval T ₂ acquired in the second time interval acquisition step and the above t ₂ and t ₃ is as shown in FIG. However, in FIG. 31, "start time of the process of the pattern 4 reduction" is for clarity that it is a time before the t _3, by exaggerating the time interval between the t ₃ depicts ing. Further, in step S4D22, the control means 20, the t _3, estimated calculated from the storage and (not shown) the processing time of each step that has been previously stored in the data with the current time.

In step S4D24, the control means 20, the value of the above-mentioned water level correction amount, in the current second of the second time interval T ₂ and the first time interval acquisition step of this estimated in the time interval estimation step modified based on the first time interval T ₁ obtained. This modification, as described above t ₃ and time interval T ₃ between the time t ₄ when it is estimated that drawdown control step is started executed _next time _(see FIG. 31) is matched to the interval T ₁ first time In addition, the stored water level correction amount used in the water level lowering control step to be repeated this time is set. However, in the above modification, the time variation of the disturbance between the drawdown control step and the t ₂ to the t ₃ has a premise that the repeated similarly in each t ₃ or later. In other words, the control unit 20 sets to modify based a water level correction amount to the ratio of the second time interval T ₂ and the interval T ₁ first time. That is, step S4D24 corresponds to a “setting step” in the present invention. And the control means 20 progresses to step S4D26.

In the discharge amount adjusting program of the present embodiment, in step S4D24, reservoir water level correction amount, this first of the first time interval T ₁ and the second time interval the current obtained at the time interval obtaining step Based on the _second time interval T2 estimated in the estimation step, the following correction is made and set. That is, the value of the stored water level correction amount is [(first time interval T ₁ ) ÷ (second time interval T ₂ ) −1] × [(upper threshold water level) − (the latest extracted in step B40). Water level minimum value)] = (product E) is corrected and set. In this setting, when the inflow amount of the water 90A to the water storage facility 10 is in a gradual change state in which the change is relatively steady, the control for realizing the sixth invention described above (see FIGS. 7 and 8). ) Is performed based on the knowledge that the smoothed reservoir water level changes with time in a constant pattern. That is, for example, in a gradually changing state (see FIGS. 24 and 27) in which the amount of water 90A flowing into the water storage facility 10 continues to increase relatively constantly (see FIGS. 24 and 27), a graph of the smoothed water storage level 91 (FIG. 26). 29, and FIG. 30) have a shape in which a plurality of downwardly convex curves are continuous. Here, the above-mentioned curves have similar shapes so that they can be regarded as being similar to each other. For this reason, when a value equal to the product E is used as the stored water level correction amount in the water level lowering control step executed one time before, the second time interval T ₂ (which is approximately equal to the time interval T ₃₎ is used. .) a first time and interval T ₁ is is matched. According to this process, it is possible to reduce the calculation amount of the control means 20 in step S4D24. In addition, the knowledge mentioned above is knowledge which this inventor newly discovered by analyzing the experimental data (illustration omitted) of the verification experiment which this inventor verified the effect of the said 6th invention .

  In step S4D26, the control means 20 compares the stored water level correction amount corrected and set in step S4D24 with the stored water level correction amount backed up in step S4D12. Subsequently, the control means 20 calculates | requires the total correction amount W of the stored water level correction amount by a series of steps from step S4D14 to step S4D24, and proceeds to step S4D28.

  In step S4D28, the control means 20 stores the total correction amount W obtained in the immediately preceding step S4D26 in the storage (not shown) as the stored correction amount X, and proceeds to step S4D30.

  In step S4D30, the control means 20 sets the above-described target water level to the above-described reduced target water level, and proceeds to step S4D32.

  The processing in step S4D32 is the same as the adjustment control in step S2D32 in FIG. Here, the step combining step S4D30 and step S4D32 corresponds to the “water level lowering control step” in the present invention. The control means 20 proceeds to step S4D34 after the adjustment control.

  By the way, as shown in Table 1, the condition determined to proceed to decrease in pattern 4 in the condition determination Z is that the control for lowering the water level executed once before is repeated this time, and the number of repetitions is one or more times. Including the condition that it is known that For this reason, the conditions under which a series of steps from step S4D10 to step S4D28 are executed correspond to the “first condition setting” in the present invention. Further, according to the series of steps from step S4D10 to step S4D28, the stored water level correction amount is corrected based on the water level difference between the latest minimum water level value and the target water level to be lowered before the water level lowering control step. . Therefore, a series of steps from step S4D10 to step S4D28 corresponds to the “correction step” and the “first selection process” in the present invention.

  In step S4D34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S4D32 (ie, step S60 in FIG. 23) and the attempt to lower the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

  By the way, a series of steps from step S4D10 to step S4D28 is executed when the following condition setting is satisfied as shown in Table 1. This condition setting is determined to be the water level lowering control step executed after the third time since the repetition of the water level lowering control step, the water level lowering control step to be repeated this time. This is a condition setting that the priority condition 1 is satisfied. This condition setting corresponds to “third condition setting” in the present invention. When the above condition setting is satisfied, the inflow amount of the water 90A to the water storage facility 10 is in a gradually changing state that is relatively steadily increasing (to some extent that the water level lowering control step needs to be repeated three times or more), and Therefore, it is necessary to correct the stored water level correction amount.

  That is, according to the series of steps described above, the following processing is possible when the condition setting is satisfied. In this process, the average inflow amount of water 90A to the water storage facility 10 and the water 90A discharged from the water storage facility 10 from the execution of the water level lowering control step to the next execution of the water level lowering control step are performed. This is a process of matching the flow rate of Accordingly, the discharge flow rate from the discharge means in the water storage facility to the river can be increased more appropriately in response to the fluctuation of the inflow amount of the water 90A to the water storage facility 10 and the water flow rate that can be taken from the river 90 can be increased. An adjustment method can be provided.

<When it is determined in the condition determination Z that the pattern 4 is advanced (FIG. 17)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the pattern 4 increases, the control unit 20 proceeds to step S4U10 shown in FIG.

  In step S4U10, the control means 20 obtains a third water level difference, which is a water level difference obtained by subtracting the latest water level maximum value extracted in step B40 shown in FIG. 9 from the rising target water level, and proceeds to step S4U12.

  In step S4U12, the control means 20 backs up the current value of the stored water level correction amount in the storage (not shown), and proceeds to step S4U14.

In step S4U14, the control means 20, the product obtained by multiplying the coefficients _{U 2} to the third level difference determined in this step S4U10 determined as a correction amount Y of water level correction amount, the process proceeds to step S4U18. Here, the coefficient U ₂ is determined in this condition judgment Z fourth level difference and this step S4U10 minus water level from rising target water level is smoothed used in (step B80 in FIG. 9) The coefficient set by the control means 20 in step S4U14 based on the third water level difference. Note that the method for setting the specific value of the coefficient U ₂ is the same as the method described in the process of step S2U14 in FIG.

  In step S4U18, the control means 20 corrects the stored water level correction amount by adding the correction amount Y of the stored water level correction amount obtained in step S4U14 to the current stored water level correction amount, and proceeds to step S4U20. .

In step S4U20, the control means 20, the storage with reference to the stored in the (not shown) data, twice the execution start time t ₅ and the water level performed before one level rise control step is performed before get the time interval between the execution start time t ₆ of the rise control step as the interval T ₁ first time, the process proceeds to step S4U22. That is, step S4U20 corresponds to the “first time interval acquisition step” in the present invention. Note that the relationship between the first time interval T ₁ acquired in the first time interval acquisition step and the above-mentioned t ₅ and t ₆ is as shown in FIG.

In step S4U22, the control means 20, the storage with reference to the data stored in the (not shown), the water level once execution start time t ₆ of the level rise control step is performed before, will be repeated this the time interval between time t ₇ is expected to increase control step is started performed to estimate the second time interval T _2, the process proceeds to step S4U24. That is, step S4U22 corresponds to the “second time interval estimation step” in the present invention. Note that the relationship between the second time interval T ₂ acquired in the second time interval acquisition step and the above t ₆ and t ₇ is as shown in FIG. However, in FIG. 32, "start time of the process of the pattern 4 rising" is for clarity that it is a time before the t _7, by exaggerating the time interval between the t ₇ depicts ing. Further, in step S4U22, the control means 20, the t _7, estimated and calculated from the storage (not shown) is previously stored processing time of the data and the current time of each step was.

In step S4U24, the control means 20, the value of the above-mentioned water level correction amount, in the current second of the second time interval T ₂ and the first time interval acquisition step of this estimated in the time interval estimation step modified based on the first time interval T ₁ obtained. This modification, as the time interval T ₃ between the time t _8, which is estimated to water level rise control step next with the t ₇ is started _{executed (see} FIG. 31) is matched to the interval T ₁ first time In addition, the value of the stored water level correction amount used in the water level elevation control step to be repeated this time is set. However, in the above modification, the time variation of the disturbance between the level rise control step, and the t ₆ to the t ₇ has a premise that the repeated similarly in each t ₇ or later. In other words, the control unit 20 sets to modify based a water level correction amount to the ratio of the second time interval T ₂ and the interval T ₁ first time. That is, step S4U24 corresponds to the “setting step” in the present invention. And the control means 20 progresses to step S4U26.

In the discharge amount adjusting program of the present embodiment, in step S4U24, reservoir water level correction amount, this first of the first time interval T ₁ and the second time interval the current obtained at the time interval obtaining step Based on the _second time interval T2 estimated in the estimation step, the following correction is made and set. That is, the value of the stored water level correction amount is [(first time interval T ₁ ) ÷ (second time interval T ₂ ) −1] × [(upper threshold water level) − (the latest extracted in step B40). Water level maximum value)] = (product e) is corrected and set. In this setting, when the inflow amount of the water 90A to the water storage facility 10 is in a gradual change state in which the change is relatively steady, the control for realizing the sixth invention described above (see FIGS. 7 and 8). ) Is performed based on the knowledge that the smoothed reservoir water level changes with time in a constant pattern. Since this knowledge has been described above, a detailed description thereof is omitted here.

  In step S4U26, the control means 20 compares the stored water level correction amount corrected and set in step S4U24 with the stored water level correction amount backed up in step S4U12. Subsequently, the control means 20 calculates | requires the total correction amount W of the stored water level correction amount by a series of steps from step S4U14 to step S4U24, and proceeds to step S4D28.

  In step S4U28, the control means 20 stores the total correction amount W obtained in the immediately preceding step S4U26 in the storage (not shown) as the stored correction amount X, and proceeds to step S4U30.

  In step S4U30, the control means 20 sets the above-described target water level to the above-described rising target water level, and proceeds to step S4U32.

  The processing in step S4U32 is the same as the adjustment control in step S2U32 in FIG. Here, the step combining step S4U30 and step S4U32 corresponds to the “water level rise control step” in the present invention. In addition, the control means 20 progresses to step S4U34 after the said adjustment control.

  In step S4U34, the control means 20 stores the current adjustment control (ie, step S60 in FIG. 23) in storage (not shown) in association with the start of the water level at this time. Then, the process proceeds to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

  By the way, as shown in Table 1, the condition determined to advance to the pattern 4 increase in the condition determination Z is that the control for increasing the water level executed one time before is repeated this time, and the number of repetitions is one or more times. Including the condition that it is known that For this reason, the conditions under which a series of steps from step S4U10 to step S4U28 are continuously executed correspond to “second condition setting” in the present invention. Further, according to the series of steps from step S4U10 to step S4U28, the stored water level correction amount is corrected based on the water level difference between the latest water level maximum value and the target water level to be raised before the water level increase control step. . Therefore, a series of steps from step S4U10 to step S4U28 corresponds to the “correction step” and the “second selection process” in the present invention.

  Further, a series of steps from step S4U10 to step S4U28 is executed when the following condition settings are satisfied as shown in Table 1. This condition setting is found to be the water level elevation control step executed after the third time since the repetition of the water level elevation control step, the water level elevation control step to be repeated this time. This is a condition setting that the priority condition 1 is satisfied. This condition setting corresponds to “third condition setting” in the present invention. When the above condition setting is satisfied, the inflow amount of water 90A to the water storage facility 10 is in a gradually changing state that is relatively steadily decreasing (to some extent that the water level raising control step needs to be repeated three times or more), and Therefore, it is necessary to correct the stored water level correction amount. That is, according to the series of steps described above, the following processing is possible when the condition setting is satisfied. In this process, the average inflow amount of water 90A to the water storage facility 10 and the water 90A discharged from the water storage facility 10 from the execution of the water level increase control step to the next execution of the water level increase control step are performed. This is a process of matching the flow rate of Thereby, it is possible to increase the flow rate of water that can be taken from the river 90 more accurately in response to the fluctuation of the inflow amount of the water 90A to the water storage facility 10, and the discharge flow rate from the discharge means in the water storage facility to the river. Can be provided.

<When it is determined in the condition determination Z that the process proceeds to decrease of the pattern 6 (FIG. 20)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the process proceeds to decrease in pattern 6, the control unit 20 proceeds to step S6D10 shown in FIG.

  In step S6D10, the control means 20 calculates | requires the 1st water level difference which is the water level difference which subtracted the fall target water level from the newest water level minimum value extracted in step B40 shown in FIG. 9, and progresses to step S6D12.

  In step S6D12, the control means 20 outputs the current value of the stored water level correction amount to the above-described storage as a stored value K for backup, and proceeds to step S6D14. Here, since the stored value K is obtained and used only in step S5D10 shown in FIG. 18 or step S5U10 shown in FIG. 19, detailed description thereof is omitted here.

  In step S6D14, the control means 20 changes the value of the stored water level correction amount to the value of the first water level difference obtained in the current step S6D10, and proceeds to step S6D30.

  In step S6D30, the control means 20 sets the target water level described above to the lower target water level described above, and proceeds to step S6D32.

  The processing in step S6D32 is the same as the adjustment control in step S2D32 in FIG. Here, the step combining step S6D30 and step S6D32 corresponds to the “water level lowering control step” in the present invention. The control means 20 proceeds to step S6D34 after the adjustment control.

  In step S6D34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S6D32 (that is, step S60 in FIG. 23) and the attempt to lower the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

<When it is determined in the condition determination Z that the pattern 6 is going to rise (FIG. 21)>
If it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the pattern 6 is to be increased, the control unit 20 proceeds to step S6U10 shown in FIG.

  In step S6U10, the control means 20 obtains a third water level difference, which is a water level difference obtained by subtracting the latest water level maximum value extracted in step B40 shown in FIG. 9 from the rising target water level, and proceeds to step S6U12.

  In step S6U12, the control means 20 outputs the current value of the stored water level correction amount to the above-mentioned storage as a saved value K for backup, and proceeds to step S6U14. Here, since the stored value K is obtained and used only in step S5D10 (see FIG. 18) or step S5U10 (see FIG. 19), detailed description thereof is omitted here.

  In step S6U14, the control means 20 changes the value of the stored water level correction amount to the value of the third water level difference obtained in step S6U10 this time, and proceeds to step S6U30.

  In step S6U30, the control means 20 sets the above-described target water level to the above-described rising target water level, and proceeds to step S6U32.

  The process of step S6U32 is the same as the adjustment control of step S2U32 in FIG. Here, the step combining step S6U30 and step S6U32 corresponds to the “water level rise control step” in the present invention. In addition, the control means 20 progresses to step S6U34 after the said adjustment control.

  In step S6U34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S6U32 (ie, step S60 in FIG. 23) and the attempt to raise the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

<When it is determined in the condition determination Z that the pattern 5 will decrease (FIG. 18)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the process proceeds to decrease in pattern 5, the control unit 20 proceeds to step S5D10 shown in FIG.

  In step S5D10, the control means 20 acquires the saved value K last backed up in the storage (not shown), and proceeds to step S5D12. Here, when the process proceeds from the condition determination Z to the decrease in the pattern 5, as shown in Table 1, the control step start timing before the first time, the water level increase control step (see FIG. 21) for increasing the pattern 6 occurs two times before and The water level lowering control step is started at the control step start timing three times before. That is, the stored value K acquired in step S5D10 is the stored water level correction amount backed up in the previous step S6U12, and the stored water level correction used in the water level increase control step at the control step start timing two times before. It can be said that it is equal to the quantity. In other words, the stored value K acquired in step S5D10 is equal to the value of the stored water level correction amount at the time when the water level raising control step is executed after the water level lowering control step is continuously executed. be able to.

  In step S5D12, the control means 20 changes the value of the stored water level correction amount to the value of the stored value K, and proceeds to step S5D14. As a result, the control unit 20 cancels the correction of the stored water level correction amount (specifically, the change of the stored water level correction amount in step S6U14) executed in the previous branch of the pattern 6 ascent (see FIG. 21).

  In step S5D14, the control means 20 calculates | requires the 1st water level difference which is the water level difference which subtracted the fall target water level from the newest water level minimum value extracted in step B40 shown in FIG. 9, and progresses to step S5D16. In the discharge flow rate adjustment program of the present embodiment, the water level minimum value is extracted from the time series data of the smoothed stored water level recognized in the above-described water level recognition step (see FIG. 9). For this reason, the latest water level minimum value used for obtaining the first water level difference in step S5D14 is the smoothed water storage water level that is below the lower threshold water level at the previous control step start timing. Can be considered.

In step S5D16, the control means 20, the product obtained by multiplying the coefficients _{U 1} to the first level difference determined in step S5D14 immediately preceding calculated as the correction amount Y of water level correction amount, the process proceeds to step S5D18. The coefficient U ₁ is the current condition determination Z second level difference and the immediately preceding step is water difference obtained by subtracting the decreased target water level from the water level smoothed used in (step B80 in FIG. 9) S5D14 This is a coefficient set by the control means 20 in step S5D16 based on the first water level difference obtained in step S5. Note that the method for setting the specific value of the coefficient U ₁ is the same as the method described in step S2D14 in FIG.

  In step S5D18, the control means 20 corrects the stored water level correction amount by adding the correction amount Y of the stored water level correction amount obtained in step S5D16 to the current stored water level correction amount, and proceeds to step S5D30.

  In step S5D30, the control unit 20 sets the above-described target water level to the above-described reduced target water level, and proceeds to step S5D32.

  The processing in step S5D32 is the same as the adjustment control in step S2D32 in FIG. Here, the step combining step S5D30 and step S5D32 corresponds to the “water level lowering control step” in the present invention. The control means 20 proceeds to step S5D34 after the adjustment control.

  In step S5D34, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S5D32 (ie, step S60 in FIG. 23) and the attempt to lower the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

  According to each step described above, when the water level lowering control step is executed only once while the water level lowering control step is repeated (as shown in Table 1, the control state three times before and the two times before When the control state and the current control state are “execution of control for lowering the water level” and the previous control state is “execution of control for raising the water level”), the above-described water level elevation control step is performed. The stored water level correction amount changed accordingly can be prevented from affecting the subsequent stored water level correction amount. As a result, when the stored water level falls below the lower threshold water level while repeating the water level lowering control step so that the water level difference between the minimum water level and the target water level for reduction becomes zero, the water level lowering is performed next. By avoiding reaching the control step, the water level can be controlled more stably.

<When it is determined in the condition determination Z that the pattern 5 is going to rise (FIG. 19)>
When it is determined in the above-described condition determination Z (step B80 in FIG. 9) that the pattern 5 is to be increased, the control unit 20 proceeds to step S5U10 shown in FIG.

  In step S5U10, the control means 20 acquires the saved value K last backed up in the above-described storage (not shown), and proceeds to step S5D12. Here, when the process proceeds from the condition determination Z to the pattern 5 increase, as shown in Table 1, the control step start timing one time before the pattern level decrease control step (see FIG. 20) is two times before and The water level raising control step is started at the control step start timing three times before. That is, the stored value K acquired in step S5U10 is the stored water level correction amount backed up in the previous step S6D12, and the stored water level correction used in the water level lowering control step at the previous control step start timing. It can be said that it is equal to the quantity. In other words, the stored value K acquired in step S5U10 is equal to the value of the stored water level correction amount at the time when the water level lowering control step is executed after the water level increasing control step is continuously executed. be able to.

  In step S5U12, the control means 20 changes the value of the stored water level correction amount to the value of the stored value K, and proceeds to step S5U14. As a result, the control means 20 cancels the correction of the stored water level correction amount (specifically, the change of the stored water level correction amount in step S6D14) executed in the previous branch of the pattern 6 decrease (see FIG. 20).

  In step S5U14, the control means 20 obtains a third water level difference, which is a water level difference obtained by subtracting the latest water level maximum value extracted in step B40 shown in FIG. 9 from the rising target water level, and proceeds to step S5U16. In the discharge flow rate adjustment program of the present embodiment, the water level maximum value is extracted from the time series data of the smoothed stored water level recognized in the water level recognition step (see FIG. 9). For this reason, the latest water level maximum value used for obtaining the third water level difference in step S5U14 is a smoothed reservoir water level that is above the upper threshold water level at the previous control step start timing. Can be considered.

In step S5U16, the control means 20, the third product obtained by multiplying the coefficients _{U 2} to level differences determined in step S5U14 immediately preceding calculated as the correction amount Y of water level correction amount, the process proceeds to step S5U18. Here, the coefficient U ₂ is the fourth level difference and the immediately preceding step a water level difference of water level smoothed used drawn from elevated target water level in the current condition determination Z (step B80 in FIG. 9) Based on the third water level difference obtained in S5D14, the coefficient is set by the control means 20 in step S5U16. Note that the method for setting the specific value of the coefficient U ₂ is the same as the method described in the process of step S2U14 in FIG.

  In step S5U18, the control means 20 corrects the stored water level correction amount by adding the correction amount Y of the stored water level correction amount obtained in step S5U16 to the current stored water level correction amount, and proceeds to step S5U30.

  In step S5U30, the control means 20 sets the above-described target water level to the above-described rising target water level, and proceeds to step S5U32.

  The processing in step S5U32 is the same as the adjustment control in step S2U32 in FIG. Here, the combined step of step S5U30 and step S5U32 corresponds to the “water level rise control step” in the present invention. In addition, the control means 20 progresses to step S5U34 after the said adjustment control.

  In step S5U34, the control means 20 stores the start time of the current adjustment control (that is, step S60 in FIG. 23) in association with the attempt to raise the water level at this time in a storage (not shown). Then, the process proceeds to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

  According to each step described above, when the water level lowering control step is executed only once while the water level raising control step is repeated (as shown in Table 1, the control state three times before and the two times before When the control state and the current control state are “execution of control for raising the water level” and the previous control state is “execution of control for lowering the water level”), the water level lowering control step is performed. The stored water level correction amount changed accordingly can be prevented from affecting the subsequent stored water level correction amount. Thus, when the stored water level exceeds the upper threshold water level while repeating the water level increase control step so that the water level difference between the maximum water level and the target water level becomes 0, the water level increase control is performed next when the stored water level exceeds the upper threshold water level. By avoiding stepping, the water level can be controlled more stably.

<When it is determined in the condition determination Z that the process proceeds to the pattern 7 (FIG. 22)>
When it is determined in the condition determination Z (step B80 in FIG. 9) that the process proceeds to the pattern 7, the control unit 20 proceeds to step S710 illustrated in FIG.

  In step S710, the control means 20 determines whether or not the process proceeds from the condition determination Z to the pattern 7 continuously. The control means 20 proceeds to step S714 if it is determined “No”, and proceeds to step S712 if it is determined “Yes”.

  Here, as described above with reference to Table 2, the control means 20 changes the stored water level correction amount when the absolute value of the fifth water level difference or the sixth water level difference is smaller than the third predetermined value. Judge that it is not necessary. For this reason, it is found that the process of the control means 20 proceeds to step S710 that only one of the water level lowering control step and the water level raising control step is repeated three times or more, and the stored water level correction amount is set. This is the case when there is no need to correct. In step S710, the control unit 20 outputs a “No” determination result when it is no longer necessary to correct the stored water level correction amount for the first time in the repetition of the one step. Moreover, the control means 20 gives the determination result of “Yes” in step S710 when the state where it is not necessary to correct the stored water level correction amount in the repetition of the one step is continued.

  In step S714, the control means 20 acquires the stored correction amount X stored last in the storage (not shown), and proceeds to step S716.

  In step 716, the control means 20 sets the fine adjustment amount V of the stored water level correction amount based on the stored correction amount X acquired in step S714, and proceeds to step S718. In the discharge flow rate adjustment program of this embodiment, the control unit 20 obtains a product obtained by multiplying the stored correction amount X acquired in step S714 by a positive number less than 1 (for example, 0.5) in step S716. This product is set as the fine adjustment amount V of the stored water level correction amount.

  In step S718, the control means 20 performs fine adjustment of the stored water level correction amount by adding the fine adjustment amount V of the stored water level correction amount to the current stored water level correction amount, and proceeds to step S720.

  In addition, when the process of the control means 20 progresses from step S710 to step S712, the control means 20 sets the fine adjustment amount V of the stored water level correction amount to 0, and proceeds to step S718.

  According to each of the above steps, it has been found that only one of the water level lowering control step and the water level raising control step is repeated three times or more (all the control states from the previous two times to the current time shown in Table 1 are all “ If the control to increase the water level has been executed "or all" control to reduce the water level has been executed "), and it is no longer necessary to correct the stored water level correction amount for the first time in this iteration, Finely adjust the stored water level correction amount. As a result, the accuracy of the optimum value of the stored water level correction amount can be increased. Further, according to the steps from step S710 to step S718, the fine adjustment is repeated this time among the water level lowering control step and the water level raising control step (steps S730, S732, S740 described later). , See S742). For this reason, the step which combined each step from step S710 to step S718 is equivalent to the "correction step" in this invention.

  In step S720, the control means 20 determines whether or not the latest data of the smoothed reservoir water level is located in the water level area 1. If it is determined as “Yes”, the control unit 20 proceeds to step S730, and “No” is determined. If so, the process proceeds to step 740. Here, as shown in FIG. 9 and FIG. 22, step S720 is performed only when the latest data of the smoothed stored water level is located in either the water level area 1 or the water level area 4 (see FIG. 6). The step to be executed. That is, the determination result of step S720 is “No” when the latest data of the smoothed stored water level is located in the water level area 4.

  In step S730, the control means 20 sets the target water level described above to the lower target water level described above, and proceeds to step S732.

  The process in step S732 is the same as the adjustment control in step S2D32 in FIG. Here, the step combining step S730 and step S732 corresponds to the “water level lowering control step” in the present invention. Note that the control means 20 proceeds to step S734 after the adjustment control.

  In step S734, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S732 (that is, step S60 in FIG. 23) and the attempt to lower the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

  In step S740, the control means 20 sets the above-described target water level to the above-described rising target water level, and proceeds to step S742.

  The process of step S742 is the same as the adjustment control of step S2U32 in FIG. Here, the step combining step S740 and step S742 corresponds to the “water level elevation control step” in the present invention. Note that the control means 20 proceeds to step S744 after the adjustment control.

  In step S744, the control means 20 stores the storage (not shown) in association with the start time of the current adjustment control in step S742 (ie, step S60 in FIG. 23) and the attempt to raise the water level at this time. ) And proceed to Step B70 shown in FIG. The adjustment control start time is also referred to as “control step start timing” below.

According to each step described above, when only one of the water level lowering control step or the water level raising control step is to be repeated (all the control states from the previous time to the current time shown in Table 1 are all “increase the water level”). The following processing can be performed when “the control to be performed is executed” or all “the control for lowering the water level is executed”. This process is to calibrate the water level to determine the amount of adjustment of the opening a ₁ water intake means 14, is a process for the control is repeated so as to correspond to variations in water level. Thus, in the water storage facility capable of increasing the flow rate of water that can be taken from the river 90 while avoiding a state in which the fluctuation of the inflow amount of the water 90 </ b> A to the water storage facility 10 cannot be fully maintained for a long time. A method for adjusting the discharge flow rate from the discharge means to the river can be provided.

<Effect of each water level lowering control step>
The “pattern 2 reduction” process described with reference to FIG. 12, the “pattern 3 reduction” process described with reference to FIG. 14, the “pattern 4 reduction” process described with reference to FIG. 16, and the “pattern 6” described with reference to FIG. According to the steps of the “decrease” process, the “pattern 5 decrease” process described with reference to FIG. 18, and the water level decrease control step in step S730 and “732” in “pattern 7” described with reference to FIG. The water level of the water storage facility 10 is reduced when the level of the stored water that has been smoothed by increasing the amount of inflow of the water rises above the upper threshold water level described above. That is, the control unit 20, by performing the adjustment reservoir water level to increase the degree of opening a ₁ water intake means 14 to be reduced to meet the target level, promote increased water intake from the water intake unit 14. In this case, the drop target water level, by being set as a level lower than the center level, and the opening a ₁ water intake means 14 is larger, thereby decreasing the water level in the water storage facility 10 more rapidly This is realized by the control means 20. This reduces the amount of water 90A that flows over the maintenance flow rate in the river 90 while dealing with an increase in the inflow amount of water 90A into the water storage facility 10, and takes a larger amount of water 90A from the water intake means 14. Water can be taken.

As described above, according to the steps of the “pattern 2 decrease” process described in FIG. 12, the “pattern 3 decrease” process described in FIG. 14, and the “pattern 4 decrease” process described in FIG. When only the water level lowering control step is to be repeated (when all the control states from the previous time to the current time shown in Table 1 are “execution of control for lowering the water level”), the intake means 14 is opened. The water level that determines the adjustment amount of degree a ₁ can be calibrated so that repeated control corresponds to fluctuations in the water level. And the discharge | release in the water storage facility which can avoid that the state which cannot respond to the fluctuation | variation of the inflow of water 90A with respect to the water storage facility 10 continues for a long period of time, and can increase the water flow rate which can be taken in from the river 90 It is possible to provide a method for adjusting the discharge flow from the means to the river.

  As described above, according to the steps of the “pattern 2 decrease” process described in FIG. 12, the “pattern 3 decrease” process described in FIG. 14, and the “pattern 4 decrease” process described in FIG. When the inflow amount of the water 90A to the water storage facility 10 shown in FIG. 5 fluctuates, the water level of the water 90A stored in the water storage facility 10 is offset near the central water level (see FIG. 6) by offsetting the influence of the fluctuation. The water level correction amount can be set. Thereby, it becomes possible to increase the flow rate of water that can be taken from the river 90 more accurately in response to the fluctuation of the inflow amount of the water 90A to the water storage facility 10.

<Effect of each water level rise control step>
The “pattern 2 rise” process described in FIG. 13, the “pattern 3 rise” process described in FIG. 15, the “pattern 4 rise” process described in FIG. 17, and the “pattern 6” described in FIG. According to the steps of the “rising” process, the “pattern 5 rising” process described in FIG. 19, and the water level increasing control step in step S740 in “pattern 7” described in FIG. 22, the water 90A in the river 90 The water level of the water storage facility 10 is increased when the level of the stored water that has been smoothed by decreasing the inflow amount of the water decreases to a level below the lower threshold level. That is, the control unit 20 performs adjustment reservoir water level to reduce the degree of opening a ₁ water intake means 14 to be raised to increase the target level, Assurance of water flow of the river 90. At this time, since the rising target water level is set as a water level located at a position equal to or higher than the central water level, the control means 20 sets the water level control target of the water storage facility 10 as the central water level (see FIG. 6). compared with the case of adjusting the opening a _1, by the opening a ₁ water intake means 14 is smaller, it becomes possible to increase the water level in the water storage facility 10 more rapidly. Accordingly, it is possible to cope with a decrease in the inflow of water 90A into the water storage facility 10 while ensuring the maintenance flow rate of the river 90, and the water level setting of the river 90 is lowered to reduce the minimum water flow rate of the river 90. It is possible to narrow down and increase the flow rate of water that can be taken from the river 90. In other words, the lower threshold water level shown in FIG. 6 can be set lower to approach the ideal water level, and the water flow rate that can be taken from the river 90 can be increased.

  Here, when each of the above steps is executed, as shown in FIG. 6, the second predetermined value that is the difference in water level between the target water level for reduction and the central water level is the difference in water level between the target water level for increase and the central water level. 1 is set larger than a predetermined value. According to this setting, it is possible to take in a larger amount of water 90A in a state where it is not necessary to consider ensuring the maintenance flow rate (specifically, for example, in a high water state) while ensuring the maintenance flow rate of the river 90. It becomes.

As described above, according to the steps of the “pattern 2 rise” process described in FIG. 13, the “pattern 3 rise” process described in FIG. 15, and the “pattern 4 rise” process described in FIG. When only the water level raising control step is to be repeated (when all the control states from the previous time to the current time shown in Table 1 are “execution of control for raising the water level”), the intake means 14 is opened. The water level that determines the adjustment amount of degree a ₁ can be calibrated so that repeated control corresponds to fluctuations in the water level. And the discharge | release in the water storage facility which can avoid that the state which cannot respond to the fluctuation | variation of the inflow of water 90A with respect to the water storage facility 10 continues for a long period of time, and can increase the water flow rate which can be taken in from the river 90 It is possible to provide a method for adjusting the discharge flow from the means to the river.

  As described above, according to the steps of the “pattern 2 rise” process explained in FIG. 13, the “pattern 3 rise” process explained in FIG. 15, and the “pattern 4 rise” process explained in FIG. When the inflow amount of the water 90A to the water storage facility 10 shown in FIG. 5 fluctuates, the water level of the water 90A stored in the water storage facility 10 is offset near the central water level (see FIG. 6) by offsetting the influence of the fluctuation. The water level correction amount can be set. Thereby, it becomes possible to increase the flow rate of water that can be taken from the river 90 more accurately in response to the fluctuation of the inflow amount of the water 90A to the water storage facility 10.

<Details of adjustment control (subroutine 1 in FIG. 23)>
In the subroutine 1 for adjusting and controlling the intake amount of the water 90A from the intake means 14 to the intake passage 14A, as shown in FIG. 23, the control means 20 first proceeds to step S10. In step S10, the control means 20 acquires various data stored in a storage (not shown) as an argument, and performs initial settings necessary for executing each step of the subroutine 1 described later. The process proceeds to step S20. In this initial setting, the smoothed intake downstream water level and the smoothed reservoir water level (that is, the latest data) recognized this time by the control means 20, the target water level and the stored water level correction amount set at the present time, Are acquired and set by the control means 20.

In step S20, the control means 20 first controls the smoothed stored water level by adding the corrected stored water level in step S10 to the smoothed stored water level acquired in step S10. Correction (i.e. calibration) to the water level used in the control of means 20. As a result, when only one of the above-described water level lowering control step or water level raising control step is repeated, the water level that determines the adjustment amount of the opening degree a ₁ of the water intake means 14 is calibrated and repeated. Control can be adapted to fluctuations in the water level. And the discharge | release in the water storage facility which can avoid that the state which cannot respond to the fluctuation | variation of the inflow of water 90A with respect to the water storage facility 10 continues for a long period of time, and can increase the water flow rate which can be taken in from the river 90 It is possible to provide a method for adjusting the discharge flow from the means to the river. In the present specification, the corrected water level obtained by adding the stored water level correction amount and the smoothed stored water level in Step S20 is also referred to as “corrected stored water level”.

  By the way, as shown in FIG. 2, the water level measuring device 11A is installed in a place where the water depth is deeper than the bottom of the intake channel 14A in the river 90 blocked by the dam discharge sand gate 12. For this reason, the corrected stored water level is a water level corresponding to the water level at which water 90A is taken in the water intake means 14 (that is, the “water intake level” in the present invention). Further, the control means 20 proceeds to step S40 after executing step S20.

  In this step S40, the control means 20 changes the intake water level when the water level of the water 90A stored in the water storage facility 10 changes from the corrected stored water level to the target water level acquired in step S10. The amount is derived as the water level change. That is, step S40 corresponds to the “intake water level change amount derivation step” in the present invention.

Here, the intake water level is a water level H ₁ shown in FIG. 3, a water level of the water storage facilities 10 relative to the height of the bottom portion of the water intake means 14 is provided in Tosuiro 14A. For this reason, in the intake water level change derivation step in the discharge flow rate adjustment program of the present embodiment, the control means 20 converts the corrected stored water level obtained in step S20 into the intake water level, and calculates the above from the converted intake water level. Derived intake water level change. That is, the control means 20 first subtracts the height difference α (see FIG. 3) between the reference water level and the above-mentioned reference water level from the target water level acquired in step S10. The height difference α is data of a predetermined value set in the storage (not shown) described above and acquired in step S10. Next, the control means 20 calculates the intake water level by subtracting the elevation difference α from the corrected stored water level. Then, the control means 20 derives the intake water level change amount by subtracting the intake water level from the result of subtracting the elevation difference α from the target water level. And the control means 20 progresses to step S50 after performing step S40. In the discharge flow rate adjustment program of the present embodiment, it is considered that the influence of the change in the water surface gradient due to the outflow of the water 90A from the water storage facility 10 and the influence of the change in the area of the horizontal water surface are negligible. However, these effects can be evaluated by correcting the value subtracted from the corrected stored water level when calculating the intake water level.

In step S50, the control means 20 searches the adjustment amount table previously stored in the storage (not shown). Thereby, the control means 20 calculates the opening / closing operation direction and the opening / closing operation time of the water intake means 14 which are amounts corresponding to the adjustment amount Δa ₁ of the opening degree a ₁ of the water intake means 14 derived by the following (Equation 4). get. And the control means 20 progresses to step S60, after performing step S50. Here, the opening / closing operation direction represents whether to move the intake means 14 in the opening direction or in the closing direction. The opening / closing operation time represents how long the water intake means 14 is moved in the opening / closing operation direction. The adjustment amount Δa ₁ corresponds to the “second minute change amount” in the present invention.

In the above (Formula 4), h is the smoothed intake water level h recognized in Step B24 executed this time. In the discharge flow rate adjustment program of the present embodiment, h is treated as a predetermined measurement value on the assumption that the amount of fluctuation is so small that it can be ignored. H ₁ is the intake water level calculated from the corrected stored water level and the data of the height difference α (see FIG. 3) in step S40 described above. Also, _{a 1} is opening _{a 1} water intake means 14 at the moment. Also, C ₁ is the correction factor of water flow due to the viscosity of water (i.e., flow coefficient) are those determined depending on Jun sides of contact between water 90A and Tosuiro 14A flowing down Tosuiro 14A. Therefore, strictly speaking, C ₁ varies according to both the opening degree a ₁ of the water intake means 14 and the water level h. However, as the discharge amount adjusting program of the present embodiment, C ₁ is small enough to influence the variation of the wetted perimeter in accordance with the variation of the opening a ₁ and the water level h of the water introducing section 14 described above is negligible, It is treated as a function of the water level H ₁ determined by the opening degree a ₁ and the water level h. B ₁ and g are the same as B ₁ and g in (Equation 1) described above, respectively, and are treated as constants in the discharge flow rate adjustment program of the present embodiment. _Also, a 2, _{B 2,} and, _{C 2} are respectively above _a 2 in (Equation 2), _{B 2,} and is the same as the _{C 2,} respectively as a discharge amount adjusting program of the present embodiment constants Be treated. B ₃ is the same as B ₃ in (Equation 3) described above, and is treated as a constant in the discharge flow rate adjustment program of this embodiment. Also, C ₃ is a correction factor of water flow due to the viscosity of water (i.e., flow coefficient), strictly vary depending on the state of the overflow water 90A from reservoir facility 14 to the fishway 13 (see FIG. 5) To do. However, the discharge amount adjusting program of the present embodiment, C ₃ on the assumption that it is the influence of the state of the overflow is varied in accordance with variation of the corrected water level as described above is negligibly small, is treated as a constant. H ₂ is the same as H ₂ in (Expression 2) described above, and the height of the corrected reservoir water level and the lower edge of the opening of the dam discharge sand gate 12 and the reference water level is described above. It can be calculated from the data of the difference β (see FIG. 2). The data of the height difference β is data of a predetermined value set in advance in a storage (not shown) and acquired in step S10. Further, H ₃ is the same as the H ₃ in the above equation (3), the high the upper surface as a reference for reservoir water level above the partition wall 13A which is located on the most upstream side in the corrected water level and fishway 13 It can be calculated from the data of the height difference γ (see FIG. 2). The data of the height difference γ is data of a predetermined value set in advance in a storage (not shown) and acquired in step S10. Further, ΔH is the intake water level change amount derived in step S40 executed immediately before, and corresponds to the “first minute change amount” in the present invention. ΔC ₁ is a minute change amount of C ₁ corresponding to ΔH.

Note that the control means 20 does not directly calculate the above (Equation 4), in which the calculation of each parameter is complicated. In other words, in the discharge flow rate adjustment program of the present embodiment, the control amount of the water intake means 14 corresponding to the second minute change amount Δa ₁ at any post-correction stored water level is calculated without calculating the above (Equation 4). The adjustment amount table is set so that it can be derived. In addition, when the above-described fluctuation in the stored water level after correction is relatively small and when the intake means 14 is performing steady intake with the intake downstream water level h being a constant water level, the adjustment amount table is Further, it can be replaced with a linear function of ΔH whose coefficient is determined by the intake downstream water level h.

  Here, the meaning of the above (formula 4) will be described. In the following description, it is assumed that the parameters handled by the control unit 20 as constants in step S50 are not changed.

The flowing water flow rate Q flowing down from the intake levee 11 to the river 90 or the intake channel 14A is expressed by Q ₁ , Q ₂ , and Q ₃ shown in the three equations (Equation 1) to (Equation 3). It is given by the following (formula 5) (corresponding to “derivative formula for the flow rate of the falling water” in the present invention).

As shown in the above (Expression 1) to (Expression 3), the above (Expression 5) reduces the opening degree a ₁ , the water levels H ₁ , H ₂ , H ₃ , and the flow coefficient C ₁ of the water intake means 14. The water flow rate Q is included as a parameter that can be varied. Further, on the premise described above, the above-described channel width B ₁ , opening width B ₂ , width B ₃ , opening degree a ₂ , flow coefficient C ₂ , C ₃ , water level h, and gravitational acceleration g are parameters that are not changed. It becomes. For this reason, the total differential equation for deriving the total differential amount ΔQ, which is the fluctuation amount of the flowing water flow rate Q, is defined by the following (Equation 6).

Here, since ΔH ₁ , ΔH ₂ , and ΔH ₃ described in (Equation 6) indicate fluctuations in the same water level (see FIG. 2), they are collectively rewritten into one minute change amount ΔH. It is something that can be done. For this reason, in (Equation 6), the total differential amount ΔQ of the flowing water flow rate Q depends on the term of the first minute change ΔH corresponding to the same fluctuation of the water level and the fluctuation of the opening a ₁ of the water intake means 14. It is given in a form including a corresponding second minute change amount Δa ₁ term and a minute change amount ΔC term corresponding to the fluctuation of the flow coefficient C ₁ .

By the way, the fact that the total differential amount ΔQ is 0 means that the influences of the minute change amounts Δa ₁ , ΔC ₁ , ΔH of the parameters described above cancel each other and become 0, and the water intake amount Q described above. Means that it does not change with respect to the variation of each parameter. For this reason, the equation obtained by substituting 0 for ΔQ in (Equation 6) is regarded as an equation of Δa ₁ and is solved, whereby the total differential amount ΔQ is set to 0 with respect to the minute change amounts ΔC ₁ and ΔH. Δa ₁ to be given in order to keep the flowing water flow rate Q constant.

Here, it is clear that the equation of Δa ₁ includes a solution in which _{one of} the minute change amounts ΔC ₁ and ΔH is 0 as a special solution. When the equation of Δa ₁ is solved using this special solution, the general solution is given in the form of (Equation 4) described above.

That is, according to the above-described method, the second minute change amount (that is, the opening degree a of the water intake means 14) is calculated from the total differential equation (Equation 6) of the derivation equation (Equation 5) of the flowing water flow rate Q from the intake dam 11. _The minute change amount excluding the adjustment amount Δa ₁ ) of ₁ is substituted. Then, the opening degree a ₁ of the water intake means 14 is set based on the second minute change Δa ₁ that should be given in order to set the total differential amount ΔQ, which is the fluctuation amount of the flowing water flow rate Q, to 0 with respect to the substituted value. Adjust. For this reason, the adjustment amount Δa ₁ of the opening degree a ₁ of the water intake means 14 required for obtaining steady water intake (that is, water intake in which the water intake amount and the water level do not vary) is calculated from the substitution value of the minute change amount. Can be obtained. Further, by obtaining the intake water level change amount ΔH substituted as the first minute change amount based on the smoothed water storage level recognized by the control means 20 and the target water level which is the control target value of the water level, It is possible to adjust the water intake so that the water level approaches the central water level without requiring monitoring and judgment.

In step S60, the control unit 20 based on the opening and closing operation direction and opening and closing times of the intake means 14 obtained in step S50, the opening degree adjustment for adjusting the degree of opening a ₁ of the intake means 14 by adjusting the amount .DELTA.a ₁ Execute. For this reason, in this specification, step S60 is also called "an opening degree adjustment step." The control means 20 which executed this opening degree adjustment step ends the subroutine 1 currently being executed.

<Description of simulation experiment (FIGS. 24 to 32)>
In addition, this inventor evaluates the effect of the adjustment method (henceforth "method F") of the discharge flow from the discharge means in the water storage facility to the river according to the second embodiment of the present invention described above. First and second simulation experiments were performed.

  In the first simulation experiment, the amount of water 90A from the water storage facility 10 in the case where the inflow amount of the water 90A into the water storage facility 10 is continuously increased at a constant speed immediately after the execution of the method F (see FIG. 24). The time change of the discharge flow rate (see FIG. 25) and the smoothed reservoir water level (see FIG. 26) was evaluated. In the first simulation experiment, the experiment was performed on the assumption that the smoothed reservoir water level is equal to the central water level immediately after execution of the method F (the time when the time is 0 (minutes) in FIG. 26).

  In the first simulation experiment, as shown in FIGS. 24 and 25, the discharge flow rate of the water 90 </ b> A from the water storage facility 10 was changed following the inflow amount of the water 90 </ b> A into the water storage facility 10. In the first simulation experiment, as shown in FIG. 26, the smoothed water level is increased immediately after execution of the method F and reaches the water level lowering control start water level 91A exceeding the upper threshold water level, and thereafter The time change of reaching the next water level lowering control starting water level 91A while drawing a downward convex curve was repeated. When this time change is seen, it turns out that the water level minimum value 91B (the left-most water level minimum value 91B shown in the figure) achieved by the initial process is located at a position about 3 [mm] higher than the target water level to be lowered. . On the other hand, in each of the adjustment controls executed after the initial process, it can be seen that the water level minimum value 91B is located near the lower target water level (in the range of about 1 [mm] above and below).

  Here, the difference between the initial process under the above conditions and the respective adjustment controls executed after this initial process is that the target water level is set to the lower threshold water level or the lower target water level, and the stored water level correction amount It is two points whether or not to set. Further, in the initial process, the minimum water level 91B achieved after the initial process is achieved even though the lower threshold water level (see FIGS. 6 and 8) lower than the lower target water level is set as the target water level. It was located in a position higher than each water level minimum value 91B. From this, it can be said that, according to the method F for setting the stored water level correction amount, it is possible to control the water level to be lower by making repeated adjustment control correspond to the fluctuation of the water level.

  In the second simulation experiment described above, as shown in FIG. 27, immediately after execution of the method F, the inflow amount of the water 90A to the water storage facility 10 is increased at a relatively fast constant increase rate, and thereafter relatively slow. Increased at a constant rate of increase. Here, the imaginary line and the broken line in FIG. 27 are auxiliary lines for making it easy to understand the increasing speed change time 92 (around 110 (minutes)) when the increasing speed of the inflow amount of water 90A is changed. Moreover, in the said 2nd simulation experiment, the time change of the discharge flow rate (refer FIG. 28) of the water 90A from the water storage facility 10 and the smoothed stored water level (refer FIG. 29) was evaluated. In the second simulation experiment, immediately after the execution of the method F (the time when the time becomes 0 (minutes) in FIG. 29), the smoothed reservoir water level was assumed to be equal to the lower target water level. .

  In the second simulation experiment, as shown in FIGS. 27 and 28, the discharge amount of the water 90 </ b> A from the water storage facility 10 was changed following the inflow amount of the water 90 </ b> A into the water storage facility 10. Further, in the second simulation experiment, as shown in FIG. 29, the smoothed water storage water level reaches the water level lowering control start water level 91A that is raised immediately after execution of the method F and exceeds the upper threshold water level, and thereafter The time change of reaching the next water level lowering control starting water level 91A while drawing a downward convex curve was repeated. This time change is also referred to as “time change F” below. Looking at this time change F, in each adjustment control after the initial process, when a relatively large water level difference 91C is observed between the minimum water level value and the target water level to be lowered (around 60 (min) in the figure and 125 ( Even in the next adjustment control, the water level minimum value 91B is brought close to the lower target water level. From here, according to the method F for setting the stored water level correction amount, even when the fluctuation speed of the inflow amount of the water 90A to the water storage facility 10 is changed, the repeated adjustment control corresponds to the fluctuation of the water level. It can be said that. According to the method F, it can be said that the water level that can cope with the change in the fluctuation rate of the inflow amount can be set lower while ensuring the maintenance flow rate of the river 90.

The second simulation experiment is performed under the same conditions as the method for adjusting the discharge flow rate from the discharge means to the river (hereinafter also referred to as “method N”) in the water storage facility as a modification of the method F. went. In this method N, among the steps in the method F, the step executed after step S4D10 is changed to step S3D14 (see FIGS. 14 and 16), and the step executed after step S4U10 is changed to step S3D14 (see FIG. 15 and FIG. 17), respectively. That is, the method N executes the first invention, the sixth invention, the second invention, the third invention, and the fifth invention described above together, but the fourth invention described above is executed. It is a method of adjusting the discharge flow from the discharge means to the river in the water storage facility.

  As shown in FIG. 30, the time change of the smoothed water level in the second simulation experiment for the method N (hereinafter also referred to as “time change N”) is the above-mentioned only after the increase speed change time 92. A difference from the time change F (see FIG. 29) was observed. More specifically, as shown in FIGS. 29 and 30, the time change N is greater than the time change F after the increase speed change time 92, and the time interval between each water level lowering control start water level 91 </ b> A and each water level minimum value. The variation of the vertical position of 91B became large (refer to the water level difference 91C around 175 (min) and 255 (min) as seen in FIG. 30). From here, the method F which implements the 4th invention of the present invention is the follow-up ability when the fluctuation rate of the inflow amount of the water 90A to the water storage facility 10 is changed, compared with the method N which does not implement the above 4th invention. It can be said that the water level can be made closer to the target water level that is the control target in the adjustment control repeated in response to the fluctuation of the water level. And according to the method F, it can be said that, compared with the method N, it is possible to set a lower water level that can cope with a change in the fluctuation rate of the inflow rate while ensuring a maintenance flow rate of the river 90. .

  The present invention is not limited to the above-described embodiments using flowcharts and the like, and various changes, additions, and deletions can be made without changing the gist of the present invention. For example, the following various forms can be implemented.

(1) In the present invention, a modification in which the above-described first predetermined value (see FIG. 6) is 0 can be employed.

(2) The water intake of the water intake means in the present invention is not limited to the water flowing down to the hydroelectric power generation facility through the water intake channel, but is changed to water intake of any application such as water supply intake or agricultural water intake. be able to. In addition, the intake means is changed from a slide gate to a tenter gate or an orifice gate, or the intake passage is changed from a rectangular cross-section open passage having a constant width to an open passage having an arbitrary shape. Equipment can be changed as appropriate. In this case, the total differential equation for deriving the total differential amount ΔQ of the flowing water flow rate Q is changed as appropriate in accordance with the specific equipment change in the water intake means.

(3) The discharge means in the present invention does not need to be configured to discharge by the dam discharge sand gate and the fishway. For example, a structure for discharging only from the fishway or a crest gate provided at the upper edge of the intake dam It is possible to change to an arbitrary configuration such as a configuration in which water that is overflowed is added and discharged. Also, release means such as changing the embankment drainage gate to a conduit where the opening cannot be adjusted, or changing the fishway from a staircase type fishway to a vertical slot type fishway or a full-section type fishway, etc. The specific equipment in can be changed as appropriate. In this case, the total differential equation for deriving the total differential amount ΔQ of the flowing water flow rate Q is changed as appropriate in accordance with the specific equipment change in the discharge means.

10 Water storage facility 10A Hydroelectric power generation facility 11 Intake dam (damming means)
11A Water level measurement device 11B Detection signal 12 Embankment sand gate (release means)
12A Barrier 13 Fishway (Discharge means)
13A Bulkhead 13B Inundation area 14 Intake means 14A Intake channel (route)
14B Water level measuring device 14C Detection signal 14D Switchgear 20 Control means 20A Building 20B Control signal 21 Control block 22 Control block 23 Control block 23A First part 23B Second part 24 Control block 25 Control block 90 River 90A Water 90B Aquatic organism 91 Smoothing Water level 91A Water level lowering control start water level 91B Water level minimum value 91C Water level difference 92 Increase speed change time N10 node N20 node

Claims (6)

A damming means for damaging a part of a river to realize that the water of the river is stored;
One or more of the water that has been stored by the damming means is always discharged directly into the river downstream of the damming means at a discharge rate determined by the water level. Discharge means,
Water intake means formed as a gate that realizes that a part of the water stored by the damming means is led to a different route from the direct discharge of the water from the discharge means to be taken. ,
Control means for realizing control of the amount of water taken by the water intake means by adjusting the opening of the water intake means;
For water storage facilities equipped with
An ideal water level that is the water level of the river, in which the sum of the discharge rates of the water from each of the discharge means is equal to the maintenance flow rate that is the minimum required water flow rate to maintain the various functions of the river. ,
When the water flow rate of the river is the lowest possible water flow rate, the maximum water flow rate that can flow down from the river through the route while ensuring the maintenance flow rate of the river is always used The amount of water and
In response to the increase or decrease in the amount of water flowing into the water storage facility, the control means controls the water intake amount of the water intake means, and the sum of the discharge flow rate indicates the water level stored in the water storage facility. there is no risk below the maintenance flow of the river, and that close to preset water level of the water intake of the water by the water introducing section as water level may be greater than the constant water consumption, the discharge In the adjustment method of the discharge flow from the discharge means in the water storage facility to the river, the flow rate of the water by the means is adjusted to be within a predetermined flow range,
A water level recognition step for causing the control means to recognize the water level stored in the water storage facility as a stored water level;
When the stored water level is higher than the upper threshold water level set in advance as a water level higher than the ideal water level, by adjusting the opening degree of the water intake means to increase the water intake amount of the water intake means, A water level lowering control step for causing the control means to execute control for lowering the water level stored in the water storage facility and setting the water level to a lower target water level set in advance as a water level higher than the ideal water level. When,
When the stored water level is higher than the ideal water level and lower than the lower threshold water level set in advance as the water level, the water intake means is adjusted to reduce the opening of the water intake means. The control is performed so as to increase the water level of the water stored in the water storage facility by reducing the water intake amount, and to set the water level to a target water level set in advance as a water level higher than the ideal water level. A water level raising control step to be executed by the means;
Repeat multiple steps including
The rising target water level is set as a lower water level than the upper threshold water level,
The drop target water level is higher than said lower threshold level and is set as a low have water as compared to the increase target level,
A method of adjusting the discharge flow from the discharge means to the river in the water storage facility. A method for adjusting the discharge flow from the discharge means to the river in the water storage facility according to claim 1,
In the water level lowering control step and the water level raising control step, the control means calibrates the stored water level corresponding to the water level actually stored in the water storage facility to the water level used in the control of the control means. The stored water level is calibrated using the stored water level correction amount, and one of the water level lowering control step or the water level raising control step executed one time before is repeated this time and is repeated this time. If it is found that the number of repetitions since the start of the repetition of the one step in the one step to be performed is equal to or greater than the predetermined number, before executing the one step to be repeated this time, Executing a correction step having a process of correcting the stored water level correction amount;
A method of adjusting the discharge flow from the discharge means to the river in the water storage facility. A method for adjusting the discharge flow from the discharge means to the river in the water storage facility according to claim 2,
A time series data preparation step of preparing the water storage level recognized by the control means in the water level recognition step repeatedly executed as time series data corresponding to the time when the recognition was performed;
Extracted from the time series data is a maximum water level that is the stored water level when the stored water level is switched from rising to decreasing, and a minimum water level that is the stored water level when the stored water level is switched from decreasing to rising. An extraction step to
Have
The correcting step includes
A first selection process that is executed when a first condition setting is satisfied, including a condition that only the water level lowering control step is known to be repeated;
A second selection process that is executed when a second condition setting is satisfied, including a condition that only the water level elevation control step is known to be repeated;
Have
In the first selection process, a process of correcting the stored water level correction amount based on a water level difference between the previous water level minimum value and the lowered target water level is executed,
In the second selection process, a process of correcting the stored water level correction amount based on a water level difference between the previous water level maximum value and the rising target water level is executed.
A method of adjusting the discharge flow from the discharge means to the river in the water storage facility. A method for adjusting the discharge flow from the discharge means to the river in the water storage facility according to claim 2,
At each control step start timing at which one of the water level lowering control step and the water level rising control step is started, which of the water level lowering control step and the water level rising control step is started is started. Prepare as timing-corresponding data,
Further, when the correction step is executed, the one step to be repeated this time is found to be the one step executed after the third time since the repetition of the one step. If the third condition setting including the condition that
A time interval between the control step start timing corresponding to the one step executed two times before and the control step start timing corresponding to the one step executed one time before, A first time interval acquisition step of acquiring as a first time interval;
A time interval between the control step start timing corresponding to the one step executed once before and the time at which the one step to be repeated this time is scheduled to be executed is a second time interval. A second time interval estimation step for estimating the time interval of
A setting step for correcting and setting the water storage level correction amount based on a ratio between the second time interval and the first time interval;
A plurality of steps including:
A method of adjusting the discharge flow from the discharge means to the river in the water storage facility. A method for adjusting the discharge flow rate from the discharge means to the river in the water storage facility according to any one of claims 1 to 4,
When adjusting the opening of the water intake means so that the water level stored in the water storage facility becomes the target water level that is a control target value of the water level,
When the water level stored in the water storage facility changes from the stored water level to the target water level, the intake water level, which is the water level at which the water intake is performed, is changed in the intake means. Intake water level change derivation step to derive as change amount,
In order to derive a total differential amount that is a fluctuation amount of the flowing water flow rate with respect to a derivation formula of the flowing water flow rate from the damming means that is an equation including at least the opening degree of the water intake means and the intake water level as parameters. Is defined in a form including at least a first minute change term corresponding to the change in the intake water level and a second minute change term corresponding to the change in the opening of the intake means. Substituting the intake water level change amount derived by the intake water level change amount deriving step into the first minute change amount in the total differential equation, An opening degree adjusting step for adjusting the opening degree of the water intake means in correspondence with the magnitude of the second minute change amount to be given in order to set the differential amount to 0;
Perform multiple steps, including
A method of adjusting the discharge flow from the discharge means to the river in the water storage facility.   A damming means for damaging a part of a river to realize that the water of the river is stored;
  A discharge means for always discharging directly at least a part of the water stored by the damming means to the river downstream of the damming means at a discharge flow rate determined by the water level;
  Water intake means formed as a gate that realizes that a part of the water stored by the damming means is led to a different route from the direct discharge of the water from the discharge means to be taken. ,
  Control means for realizing control of the amount of water taken by the water intake means by adjusting the opening of the water intake means;
For water storage facilities equipped with
  In response to an increase or decrease in the amount of water flowing into the water storage facility, the control means controls the water intake amount of the water intake means to bring the water level stored in the water storage facility to a preset central water level. In the adjustment method of the discharge flow from the discharge means to the river in the water storage facility to adjust the discharge flow of the water by the discharge means so as to be within a predetermined flow rate range by approaching,
  A water level recognition step for causing the control means to recognize the water level stored in the water storage facility as a stored water level;
  When the stored water level is higher than the upper threshold water level set in advance as a water level higher than the central water level, by adjusting the opening degree of the water intake means to increase the water intake amount of the water intake means A water level lowering control step for causing the control means to perform control to lower the water level stored in the water storage facility and to set the water level to a lower target water level set in advance;
  When the stored water level is lower than a lower threshold water level set in advance as a water level lower than the central water level, the water intake amount of the water intake unit is reduced by adjusting the opening degree of the water intake unit. And a water level raising control step for causing the control means to execute control to raise the water level stored in the water storage facility and to set the water level to a preset target water level set in advance,
Repeat multiple steps including
  The rising target water level is set as a water level that is lower than the upper threshold water level and higher by a first predetermined value that is 0 or more than the central water level,
  The lower target water level is set as a water level that is higher than the lower threshold water level and lower by a second predetermined value that is higher than the first predetermined value compared to the central water level.
A method of adjusting the discharge flow from the discharge means to the river in the water storage facility.