JP4682675B2 - Groundwater management system and groundwater management method - Google Patents

Description

  The present invention relates to a groundwater management system and a groundwater management method related to prevention of groundwater level drop due to pumping when excavating natural ground in civil engineering and construction work.

  For example, in Patent Document 1, the distribution state of the groundwater level around the pumping well is estimated from the groundwater level of the observation well and the pumped amount from the pumping well by reverse analysis, and the groundwater around the pumping well is based on the analysis result. There is disclosed a method for controlling in real time the degree of opening and closing of a solenoid valve disposed in each pumping well so that the position reaches a set water level. In this method, the water level in the borehole of the pumping well and observation well is measured with a hydrometer, the pumping volume of the pumping well is measured with an electromagnetic flow meter, and the infiltration characteristics of the ground necessary for estimating the relationship between the pumping volume and the groundwater level Is analyzed in reverse from the pumped-up well and the water level in the observation well during system operation, and the current groundwater level around the pumping well is estimated from the current pumped amount to eliminate the difference between the observed well level and the set water level. Thus, the degree of opening and closing of the motor-operated valve is automatically controlled in real time with an accuracy of 0.1% with respect to 100% fully opened.

Further, in Patent Document 2, if a convergence value of the condensate amount with respect to the condensate pressure when condensing the condensate well is given, the relationship between the condensate pressure and the condensate amount corresponding to the condensate pressure is obtained by changing the condensate pressure. A method of predicting and grasping the phenomenon of clogging of the condensate well and condensing at an optimal condensate pressure is disclosed. In this method, the initial condensate pressure P1 is set to about P1 = 9.8 KPa, the condensate pressure is increased by ΔP≈9.8 KPa, and the condensate amount Q at each condensate pressure, the water level rise amount Δh in the observation well, and the initial data regarding the time t. Based on (data at the stage where clogging of the aquifer does not progress so much), the converging amount (Qfi, Δhfi) of the condensate amount and the water level rise in the observation well is predicted and calculated by a personal computer by the hyperbola method etc. , Δhfi starts condensate with the condensate pressure PS at the time when it becomes equal to or greater than the target value (Qreq. Δhreq.).
JP 2001-323477 A JP-A-6-220866

  However, in the method described in Patent Document 1, since the pumping amount is adjusted by the degree of opening and closing of the motor-operated valve provided on the discharge side of the pump, the operation of the pumping pump in a state where the pumping amount is reduced Has a problem that the pump body is loaded and the life of the pump is shortened. In addition, even if the pump is pumped at a capacity smaller than the rated pumping capacity, the power consumption is the same as that at the rated pumping capacity, and the electricity bill is high. Furthermore, when starting or stopping the pumping, there is a problem that an impact sound is generated due to a water hammer phenomenon when the pump is operated and stopped.

  In addition, the method described in Patent Document 2 requires a compressor, a control means for controlling the pressure of the compressor, a predictive measurement means for predicting the relationship between the condensate pressure and the observation well level, and controls only the condensate. There is a problem that the cost of the apparatus is high. In addition, the measurement results such as the initial injection pressure P1 and the increase pressure Δh obtained when showing the relationship between the condensate pressure and the condensate amount are different depending on the natural conditions. There was a problem that the method used was difficult. In addition, there is a problem that the condensate well may be clogged during acquisition of data indicating the relationship between the condensate pressure and the condensate amount.

  And in the method described in Patent Document 1, only the management of the amount of pumped water and the groundwater level around the pumping well is targeted, there is no description about the method of condensing the pumped groundwater, and it is described in Patent Document 2. However, there is no description of the pumping method for pumping, only for the management of condensate volume and groundwater level around the condensate well.

  Therefore, the present invention has been made in view of the above problems, and its purpose is to automatically manage the amount of pumped water, the amount of condensate, the groundwater level around the pumping well, the groundwater level around the condensate well, It is to provide a groundwater management system and a groundwater management method with low running costs.

To achieve the above object, the management system of the groundwater of the present invention is a management system for managing groundwater level by condensing the groundwater that is pumped from the pumping well to restore fluid well, groundwater level of the pumping Iuchi and pumping Iuchi water gauge for detecting the water pumps, and a pumping flow meter for measuring a discharge amount discharged from該揚water pump, and pumping means for pumping the groundwater from the pumping well, the A pumping flow meter for measuring the amount of water pumped by the pumping means, and a water level within the pumping well side influence range for detecting the groundwater level installed within the range where the groundwater level is affected by pumping from the pumping well. And a water level gauge outside the affected area on the side of the pumping well for detecting the groundwater level in the natural state of the natural ground, which is installed outside the area where the groundwater level is affected by the pumping from the pumping well. And water supply means for water and groundwater is pumped by said pumping means to said recovery fluid well, the condensate flow meter for measuring the recovery amount of water condensate in the condensate fluid well, groundwater level in the condensate Mizui A condensate well water level meter for detecting water, condensate means for condensing groundwater fed by the water feed means to the condensate well, and for measuring the amount of condensate by the condensate means A condensate flow meter, a condensate well-side affected range water level meter for detecting the groundwater level, installed in a range where the groundwater level rises due to condensate from the condensate well, and the condensate well The water level meter outside the condensate well side influence range for detecting the groundwater level in the natural state of the natural ground, and the water level meter within the influence range of the pumping well side , which are installed outside the range where the groundwater level rises due to the condensate , Water level gauge outside the pumping well side influence range, the pumping Based on the measured data of the internal water level meter and the pumped flow meter, the distribution of the groundwater level around the pumping well is analyzed, and the minimum required pumping amount of the pumping well for reducing the groundwater level to the predetermined water level is calculated. And calculating groundwater in the vicinity of the condensate well based on the measurement data of the condensate well-side affected water level meter, the condensate well-side unaffected water level meter, the condensate well water level meter, and the condensate flow meter. A calculation processing unit that calculates the maximum condensate amount that can be reconstituted in order to prevent the condensate from overflowing from the condensate well by analyzing the distribution state, and the amount of pumped water from the well and the condensate well condensate water, respectively, said to be the calculated pumping amount and the condensate water by the processing unit, controls the water supply amount by the water supply means and recovery water by pumping amount and the condensate means by said pumping means control And a control device having a unit (first invention).

The second invention according to the first invention, the water pumps are intended to be controlled by the inverter, said pumping means, characterized by adjusting the pumping amount by changing the rotational speed of the front Symbol water pumps And

According to a third invention, in the first or second invention, a plurality of the pumping wells and the condensate wells are provided, and the water supply means includes a plurality of water pipes connecting the pumping wells and the condensate wells, A connecting pipe for connecting the water pipes to each other, and a flow rate adjusting valve installed in the connecting pipe, and the control unit is configured to calculate the amount of pumped water from the pumping well and the amount of condensed water to the condensate well, respectively. The number of rotations of the pump and the degree of opening and closing of the flow rate adjustment valve are controlled so that the amount of pumped water and the amount of condensed water calculated by the processing unit are obtained.

According to a fourth invention, in the first invention, the condensate means filters the groundwater to be pumped to prevent clogging of the condensate well, and the inlet side of the clogging prevention device And a pressure gauge for measuring water pressure on the water discharge side, and the control device detects a condensate well having a clogging device in which a pressure difference between the water input side and the water discharge side is greater than a predetermined value. The degree of opening and closing of the flow rate adjusting valve is controlled to increase the amount of condensate to other condensate wells.

A fifth invention is characterized in that, in any one of the first to fourth inventions, groundwater pumped from the pumping well is condensed into the condensate well without being exposed to the atmosphere.

A groundwater management method according to a sixth aspect of the present invention is a management method for managing groundwater level by condensing groundwater pumped from a plurality of pumping wells to a plurality of condensate wells, wherein the pumping well and the condensate well are connected. In addition to providing a plurality of water pipes and a connecting pipe for connecting the water pipes to each other, a flow rate adjusting valve is provided in the connecting pipe, and groundwater is pumped from the pumping well by a pump, and the pumped amount is converted into a pumped flow meter. The groundwater level in the pumping well is measured with a pumping well water level meter, and the groundwater level in the range where the groundwater level is affected by the pumping from the pumping well is changed to the pumping well side affected range water level meter. The groundwater level in the natural state of the natural ground outside the range affected by lowering the groundwater level due to the pumping from the pumping well is measured with the water level gauge outside the pumping side influence range, and pumped from the pumping well. The groundwater is recovered by the water pipe. Water to the well, the groundwater sent by the water supply means is measured with a condensate flow meter to condensate into the condensate well, the groundwater level in the condensate well is measured with a condensate well water level meter, The groundwater level within the range affected by the rise from the condensate well is measured by the water level gauge within the condensate well side, and the groundwater level is affected by the condensate from the condensate well. The groundwater level in the natural state of the natural ground outside the range is measured with the condensate well side influence range outside water level meter, the pumping well side influence range water level meter, the pumping well side influence range outside water level meter, the pumping well water level meter Based on the measurement data of the pumped flow meter, the distribution state of the groundwater level around the pumping well is analyzed to calculate the pumping amount of the pumping well for lowering the groundwater level to a predetermined level, and the condensate well Water level meter within the side impact range, water outside the condensate side impact range In order to prevent the condensate from overflowing from the condensate well by analyzing the distribution state of the groundwater level around the condensate well based on the measurement data of the condensate well water level meter and the condensate flow meter. The amount of condensate that can be watered is calculated by an arithmetic processing unit, and based on the calculation result of the arithmetic processing unit, the number of rotations of the pump and the opening / closing degree of the flow rate adjustment valve are controlled by the control unit, and the pumping well It is characterized by minimizing the amount of water pumped from the ground and maximizing the amount of condensate of the groundwater pumped up.

In a seventh aspect based on the sixth aspect , the calculation method of the arithmetic processing unit includes a step of measuring the pumping amount of the pumping well with the pumping flowmeter, and the condensate amount of the condensate well. Measured by a meter, the critical water level hrmax set as the highest water level in the condensate well, the water level H0 'measured by the condensate well side out-of-range water level meter, and measured by the condensate well water level meter Based on the detected water level hr and the detected condensate amount Qr, the condensate condensate amount Qrmax, which is the maximum condensable amount, is calculated as Qrmax = (hrmax−H0 ′) / (hr−H0 ′) × A step of estimating by Qr, and a step of confirming that the pumped amount is less than a flow rate obtained by multiplying the limit condensate amount by a predetermined safety factor.

According to an eighth invention, in the seventh invention, in the step of confirming that the pumped amount is less than a flow rate obtained by multiplying the limit condensate amount by a predetermined safety factor, the pumped amount is set to the limit condensate amount. In the case where the flow rate is greater than the flow rate multiplied by the safety factor, the step of adding the difference amount between the pumped amount and the flow rate obtained by multiplying the critical condensate amount by a predetermined safety factor to the pumped amount of another pumping well, It is characterized by re-executing the step of confirming that the pumped amount of other wells is less than the flow rate obtained by multiplying the limit condensate amount of other condensate wells by a predetermined safety factor.

According to a ninth invention, in the seventh or eighth invention, the critical condensate amount is a water head difference between a critical water level set as a maximum value of the water level in the condensate well and a water level outside the condensate well side influence range water level gauge. Is divided by the head difference between the water level of the condensate well water level gauge and the water level gauge outside the condensate well side influence range to calculate the margin ratio of the head difference, and the result is calculated by multiplying the margin ratio by the amount of condensate. It is characterized by that.

  According to the groundwater management system and the groundwater management method according to the present invention, by providing a pumping means, a condensing means, a water feeding means, and a control device for controlling all of these, the amount of pumped water, the amount of condensate, It is possible to manage the groundwater level and the groundwater level around the condensate well.

  Moreover, by providing the control unit with the arithmetic processing unit and the control unit, it is possible to minimize the amount of water pumped from the pumping well, and to maximize the amount of condensed water in the pumped ground water, The impact of construction on the surrounding ground can be minimized. And these management can be performed automatically. Furthermore, most of the pumped-up groundwater can be recovered, and the amount of groundwater flowing to the sewerage can be reduced, so the sewerage usage fee can be reduced.

  By using a pumping pump controlled by an inverter as the pumping means, the motor rotation speed of the pumping pump can be adjusted according to the pumping amount, and the life of the pumping pump is extended because the load is reduced. In addition, when the amount of pumped water is small, power consumption is reduced, so the electricity bill can be reduced.

  By providing a water supply means for connecting the pumping well and the condensate well, the groundwater pumped from the pumping well can be condensed into the condensate well without being exposed to the atmosphere.

  In multiple pumping wells and condensate wells, the processing unit calculates the pumping contribution rate and condensate contribution rate for each pumping well and condensate well, and the control unit calculates the results, pumping contribution rate, and condensate contribution rate. Based on the above, by controlling the number of rotations of the pumping pump of each pumping well and the opening / closing degree of each flow rate adjusting valve, it becomes possible to achieve a predetermined groundwater level easily because pumping and condensing can be performed efficiently. .

  When the controller detects that the pressure difference between the inlet side and outlet side of the clogging prevention device is greater than the specified value, it will condense all the groundwater pumped by sending groundwater to other condensate wells. be able to. In addition, the clogging prevention device can be cleaned while water is being supplied to another condensate well.

  The present invention relates to a groundwater management system and a groundwater management method for automatically managing the amount of pumped water, the amount of condensate, the groundwater level around the pumping well, and the groundwater level around the condensate well.

Hereinafter, preferred embodiments of a groundwater management system and a groundwater management method according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an installation status of a groundwater management system according to the first embodiment of the present invention. FIG. 2 is a side view showing the installation status of the pumping means according to the present embodiment, and FIG. 3 is a side view showing the installation status of the condensing means according to the present embodiment.

  As shown in FIG. 1, the groundwater management system 1 is installed within a range where the groundwater level is lowered due to the pumping means 5 for pumping the groundwater from the pumping well 3 and the pumping from the pumping well 3, Water level gauge 7 within the pumping well side influence range for detecting the groundwater level and installed outside the range where the groundwater level drops due to pumping from the pumping well 3, and detects the groundwater level in the natural state of natural ground Water level gauge 9 outside the pumping well side influence range, water feeding means 13 for feeding ground water pumped by pumping means 5 to condensate well 11, and ground water sent by water feeding means 13 to condensate well 11 A condensate means 15 for condensing, and a condensate well-side affected range water level meter 17 for detecting the groundwater level, which is installed in a range where the groundwater level rises due to the condensate from the condensate well 11; Condensate from condensate well 11 Installed outside the range affected by the rise of the groundwater level, the water level gauge 19 outside the condensate well side for detecting the groundwater level in the natural state of the natural ground, and the amount pumped from the pumping well 3 is the minimum required And a control device 21 that controls the pumping means 5, the condensing means 15, and the water feeding means 13 so as to maximize the amount of groundwater that is pumped up.

  As shown in FIG. 2, the pumping means 5 includes a pumping well water level meter 23 for detecting the groundwater level in the pumping well 3, a pumping pump 25 controlled by an inverter, and a discharge discharged from the pumping pump 25. And a pumping flow meter 27 for measuring the amount.

  Based on the water level measured by the pumping well water level gauge 23, the rotational speed of the pumping pump 25 is changed by the inverter so that the water level within the pumping well side influence range becomes the target predetermined water level, and the pumping amount is adjusted.

  As shown in FIG. 3, the condensing means 15 includes a condensate flow meter 29 for measuring the amount of condensate to be condensed in the condensate well 11, and a condensate well for detecting the groundwater level in the condensate well 11. A water level gauge 31, a clogging prevention device 33 for filtering the groundwater to be pumped and preventing clogging of the condensate well 11, and a water pressure gauge disposed on the water inlet side and the water outlet side of the clogging prevention device 33, respectively. Pressure gauges 35 and 36.

The clogging prevention device 33 removes impurities such as earth and sand in the condensate, thereby preventing the condensate function of the condensate well 11 from being deteriorated. In the case where the condensate prevention device 33 has been filtered for a long time and the filtration function of the clogging prevention device 33 has been reduced, and the pressure difference between the pressure gauges 35 and 36 installed before and after becomes larger than a predetermined value, the control device 21 connects the connecting pipe The flow control valve 41 (described later) 39 is adjusted to supply groundwater to the other condensate wells 11, and the condensate to the condensate wells 11 having the clogging prevention device 33 having a large pressure difference is stopped. Since the total amount of condensate does not change by sending water to the other condensate wells 11, there is no need to reduce the pumped amount. In addition, it becomes possible to clean the clogging prevention device 33 during water feeding to the other condensate wells 11.
Based on the water level measured by the condensate well water level gauge 31, the condensate amount is controlled by the control device 21 so that the condensate does not overflow.

  The water supply means 13 connects the pumping well 3 and the condensate well 11, and connects the water supply pipe 37 and the water supply pipe 37 that supplies the groundwater pumped from the pumping well 3 to the condensate well 11 without touching the atmosphere. A connecting pipe 39 and a flow rate adjusting valve 41 disposed in the connecting pipe 39. The water pipes 37 are connected to each other so that the groundwater pumped from a certain pumping well 3 can be returned to all the condensate wells 11 through the connecting pipe.

  FIG. 4 is a schematic diagram of a system of the control device according to the present embodiment, FIG. 5 is a flowchart showing a calculation procedure performed every predetermined time of the calculation processing unit according to the present embodiment, and FIG. It is a flowchart which shows the procedure of the calculation always performed by the calculation process part which concerns on embodiment.

As shown in FIG. 4, the control device 21 includes an arithmetic processing unit 43 and a control unit 45, and the arithmetic processing unit 43 includes a pumping well side in-effect range water level meter 7, and a pumping well side effect range outside water level meter. 9. Pumping well 3 for lowering the groundwater level to a predetermined water level by analyzing the distribution state of the current groundwater level around the pumping well 3 based on the measurement data of the pumping well water level meter 23 and the pumping flow meter 27 Water level gauge 17 within the condensate well side influence range, water level gauge 19 outside the condensate well side influence range, condensate well water level gauge 31, and condensate flow meter 29 based on the respective measurement data 11 has a function of calculating the amount of condensate that can be condensed to prevent the condensate from overflowing. Further, in the plurality of pumping wells 3 and the condensate wells 11, the arithmetic processing unit 43 includes the pumping contribution ratio indicating the ratio of the pumping amount of each pumping well 3 to the total pumping amount of the groundwater pumped from all the pumping wells 3 and all It has a function of further calculating a condensate contribution ratio indicating the ratio of the condensate amount of each condensate well 11 to the total condensate amount of groundwater condensate in the condensate well 11.
Further, the control unit 45 has a function of controlling the rotation speed of the pumping pump 25 and the opening / closing degree of the flow rate adjustment valve 41 based on the calculation result of the calculation processing unit 43.

Below, the calculation procedure performed at predetermined time intervals in the calculation processing unit 43 will be described first.
In S10 of FIG. 5, the arithmetic processing unit 43 determines the water level meter 7 within the pumping well side influence range, the water level meter 9 outside the pumping well side influence range, the water level meter 23 within the pumping well side, the pumping flow meter 27, and the water level within the condensate side influence range. Total water level 17 outside the condensate well side influence range 19, condensate well internal water level meter 31, condensate flow meter 29, the pumping well side influence range water level, the pumping well side influence range outside water level, the pumping well level, pumping flow rate Detects the water level within the condensate well side influence range, the water level outside the condensate well side influence range, the condensate well water level, and the condensate flow rate.

Based on these measurement data, the distribution state of the groundwater level around the current pumping well 3 and condensate well 11 is analyzed in S11 of FIG.
Then, in S12 of FIG. 5, a predetermined predetermined water level is set within the pumping well side influence range, and the optimum pumping amount in each pumping well 3 is calculated in order to keep the predetermined water level constant. Here, the pumping contribution ratio indicating the ratio of the pumping amount of each pumping well 3 to the total pumping amount of the groundwater to be pumped is also calculated.
In S13 of FIG. 5, the optimum condensate amount in each condensate well 11 is calculated so that the condensate amount of each condensate well 11 is considered and the water level around the condensate well 11 is the same as the water level outside the condensate well side influence range. To do. Here, the condensate contribution ratio indicating the ratio of the condensate amount of each condensate well 11 to the total condensate amount of the groundwater to be condensed is also calculated. These pumping contribution rate and condensate contribution rate are calculated so that the pumped amount is the minimum necessary and the amount of pumped ground water is maximized.
And the control part 45 adjusts all the flow volume arrange | positioned by the rotation speed of all the pumps 25 of each pumping well 3, and each connection pipe | tube 39 based on the calculated pumping contribution rate and a condensate contribution rate. The degree of opening and closing of the valve 41 is controlled. Therefore, the pumped amount of each pumping well 3 is pumped according to the pumping contribution rate, and the pumped water amount of each condensate well 11 is pumped according to the condensate contributing rate.

  The series of steps S10 to 13 described above are performed at predetermined time intervals, and can appropriately correspond to changes in the groundwater level distribution around the pumping well 3 or the condensate well 11 due to pumping or condensate. .

Next, a calculation procedure performed constantly by the calculation processing unit 43 will be described.
In S20 of FIG. 6, the arithmetic processing unit 43 detects the pumping amount Qd with the pumping flow meter 27 installed in each pumping well 3. The pumping amount Qd varies depending on each pumping well 3 depending on the contribution rate of pumping.

Next, in S21 of FIG. 6, the limit water level hrmax set as the maximum water level in the condensate well 11, the water level H0 'of the condensate well-side outside influence range water level meter 19, the water level hr of the condensate well water level meter 31, the condensate amount Qr The condensate condensate amount Qrmax, which is the maximum value of the flow rate that can be condensed into the condensate well 11 based on the equation (1), is expressed by equation (1).
Qrmax = (hrmax−H0 ′) / (hr−H0 ′) × Qr (1)

In S22 of FIG. 6, when the pumped amount Qd is larger than the limit condensate amount Qrmax, a sewage treatment fee is charged for the treatment of groundwater that overflows the condensate well 11 and cannot condense into the condensate well 11. Therefore, the pumped water amount Qd is managed so as not to exceed the limit condensate water amount Qrmax. That is, the pumped water amount Qd that can be pumped is expressed by the equation (2) obtained by multiplying the safety factor α by the limit condensate water amount Qrmax.
Qd <α × Qrmax (2)
Here, the safety factor α is about 0.8 to 1.
Then, it is confirmed that the pumped amount Qd is less than the flow rate obtained by multiplying the limit condensate amount Qrmax by a predetermined safety factor α.

Here, when the pumped amount Qd is larger than the flow rate obtained by multiplying the limit condensate amount Qrmax by the predetermined safety factor α, the pumped amount Qd and the limit condensate amount Qrmax are multiplied by the predetermined safety factor α in S23 of FIG. The difference ΔQd from the flow rate is added to the pumping amount Qd ′ of the other pumping well 3, and is less than the flow rate obtained by multiplying the critical condensate amount Qrmax ′ of the other condensate well 11 by a predetermined safety factor α. Re-execute the process to check. That is, it is confirmed that the value obtained by adding the difference amount ΔQd to the pumped amount Qd ′ of other pumping wells 3 is obtained by multiplying the safety rate α by the limit condensate amount Qrmax ′.
Qd ′ + ΔQd <α × Qrmax ′ (3)
Then, the value obtained by adding the difference amount ΔQd to the pumped amount Qd ′ of the other pumping well 3 is less than the flow rate obtained by multiplying the limit condensate amount Qrmax ′ of the other condensate well 11 by the predetermined safety factor α. If confirmed, the control unit 45 controls the number of revolutions of the pump 25 and the degree of opening / closing of the flow rate adjustment valve 41 based on the calculation result of the calculation processing unit 43 to flow the ground water to the other condensate well 11.
When the pumped amount Qd is less than the flow rate obtained by multiplying the limit condensate amount Qrmax by a predetermined safety factor α, the groundwater pumped from each pumping well 3 is directly condensed into the condensate well 11.

  The series of steps S20 to 23 described above are always performed, and the pumped water amount Qd is prevented from exceeding the limit condensate water amount Qrmax.

  Therefore, the groundwater management system 1 according to the present invention is provided with the pumping means 5, the condensate means 15, the water supply means 13, and the control device 21 for controlling all of them, so that the pumping amount, the condensate amount, the pumping well 3 and The groundwater level around the condensate well 11 can be managed. Furthermore, since the control device 21 includes the arithmetic processing unit 43 and the control unit 45, these managements can be automatically performed.

  In the plurality of pumping wells 3 and condensate wells 11, the arithmetic processing unit 43 calculates the pumping contribution rate and the condensate contribution rate of each pumping well 3 and each condensate well 11. Based on this calculation result, the control unit 45 controls the number of rotations of the pump 25 of each pumping well 3 and the degree of opening / closing of each flow rate adjustment valve 41, thereby enabling efficient pumping and condensing. The periphery of the pumping well 3 and the condensate well 11 can be easily set to a predetermined water level.

  For the convenience of understanding the invention, in the present embodiment, the method of pumping water from two pumping wells and returning the pumped ground water to the two condensate wells has been described. The condensate wells are not limited to two, and can be applied to one or more condensate wells and pumped wells.

It is a figure which shows the installation condition of the groundwater management system which concerns on 1st embodiment of this invention. It is a side view which shows the installation condition of the pumping means which concerns on this embodiment. It is a side view which shows the installation condition of the condensing means which concerns on this embodiment. It is the schematic of the system of the control apparatus which concerns on this embodiment. It is a flowchart which shows the procedure of the calculation performed for every predetermined time of the calculation process part which concerns on this embodiment. It is a flowchart which shows the procedure of the calculation always performed by the calculation process part which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Groundwater management system 3 Pumping well 5 Pumping means 7 Water level meter within pumping well side influence range 9 Water level meter outside pumping well side influence range 11 Condensation well 13 Water supply means 15 Condensation means 17 Water level meter 19 within condensate side influence range Water level gauge outside the well-influenced area 21 Control device 23 Water level gauge in the pumping well 25 Pumping pump 27 Pumping flow meter 29 Condensate flow meter 31 Condensate water level meter 33 Clogging prevention device 35 (Inlet side) Pressure gauge 36 (Outlet side) Pressure gauge 37 Water supply pipe 39 Communication pipe 41 Flow rate adjusting valve 43 Arithmetic processing part 45 Control part

Claims (9)

A management system for managing groundwater level by condensing groundwater pumped from a pumping well into a condensate well,
In order to pump groundwater from the pumping well , comprising a pumping well water level meter for detecting the groundwater level in the pumping well, a pumping pump, and a pumping flow meter for measuring a discharge amount discharged from the pumping pump. Pumping means,
A water level meter within the pumping well side influence range for detecting the groundwater level, which is installed in a range where the groundwater level is affected by pumping from the pumping well; and
A water level gauge outside the pumping well side influence range for detecting the groundwater level in the natural state of the natural ground, installed outside the range where the groundwater level is affected by pumping from the pumping well,
Water supply means for supplying groundwater pumped by the pumping means to the condensate well;
Condensate flowmeter for measuring the amount of condensate to be condensed in the condensate well and a condensate well water level meter for detecting the groundwater level in the condensate well are fed by the water feeding means. Condensing means for condensing groundwater into the condensate well;
A water level meter in the condensate well-side influence range for detecting the groundwater level, which is installed in a range where the groundwater level rises due to the condensate from the condensate well,
A water level gauge outside the condensate well side influence range for detecting the groundwater level in the natural state of the natural ground, installed outside the range affected by the rise of the groundwater level due to the condensate from the condensate well,
Based on the measurement data of the pumping well side influence range water level meter, the pumping well side influence range outside water level meter, the pumping well water level meter, the pumping flow meter, the distribution state of the groundwater level around the pumping well is analyzed. And calculating the minimum required pumping amount of the pumping well for lowering the groundwater level to a predetermined water level, the water level meter within the condensate well side influence range, the water level meter outside the condensate well side effect range, the condensate well inside Based on the measurement data of the water level meter and the condensate flow meter, the maximum amount of condensate that can be condensed in order to prevent the condensate from overflowing from the condensate well by analyzing the distribution of the groundwater level around the condensate well an arithmetic processing unit for calculating a pumping amount and condensate water to the recovery fluid well from the pumping well is, as respectively, serving as the said pumping amount and condensate water calculated by the arithmetic processing unit, according to the pumping means pumping amount A control device and a control unit for controlling the water supply amount by the water supply means and recovery water by the condensate means,
A groundwater management system characterized by comprising: The pump is controlled by an inverter,
It said pumping means, the management system of groundwater according to claim 1, characterized in that to adjust the pumping quantity by changing the rotational speed of the front Symbol water pumps. A plurality of the wells and the condensate wells are provided,
The water supply means includes a plurality of water supply pipes connecting the pumping well and the condensate well, a communication pipe connecting the water supply pipes, and a flow rate adjusting valve installed in the communication pipe ,
The control unit is configured so that the amount of pumping from the pumping well and the amount of condensate to the condensate well are the pumping amount and the condensate amount calculated by the arithmetic processing unit, respectively, and the management system of groundwater according to claim 1 or 2, characterized in that controlling the degree of opening of the flow regulating valve. The condensate means filters groundwater to be pumped and prevents clogging of the condensate well, and a pressure gauge for measuring the water pressure on the inlet side and outlet side of the clogging prevention device And further comprising
The control device detects the condensate well having a clogging device in which a pressure difference between the inlet side and the outlet side is larger than a predetermined value, and increases the amount of condensate to other condensate wells. The groundwater management system according to claim 1 , wherein the opening / closing degree of the groundwater is controlled. The groundwater management system according to any one of claims 1 to 4 , wherein groundwater pumped from the pumping well is condensed into the condensate well without being exposed to the atmosphere. In a management method for managing the groundwater level by condensing groundwater pumped from a plurality of pumping wells to a plurality of condensate wells,
A plurality of water pipes for connecting the pumping well and the condensate well, and a connecting pipe for connecting the water pipes to each other, and a flow rate adjusting valve for the connecting pipe,
The groundwater is pumped from the pumping well by a pump, and the pumping volume is measured by a pumping flow meter.
Measure the groundwater level in the pumping well with a water level meter in the pumping well,
Measure the groundwater level within the range where the groundwater level is affected by the pumping from the pumping well with a pumping well side affected range water level meter,
Measure the groundwater level in the natural state of the natural ground outside the range affected by the lowering of the groundwater level due to the pumping from the pumping well with a water level gauge outside the pumping well side influence range,
Aforementioned water to recover Mizui groundwater that is pumped from the pumping well in the water pipe,
Measuring the groundwater sent by the water supply means with a condensate flow meter and condensing it into a condensate well;
Measure the groundwater level in the condensate well with a condensate well level meter,
Measure the groundwater level within the range where the groundwater level is affected by the condensate from the condensate well with a condensate-side impacted range water level meter,
Measure the groundwater level in the natural state of the natural ground outside the range affected by the rise of the groundwater level due to the condensate from the condensate well with a water level gauge outside the condensate side influence range,
Based on the measurement data of the pumping well side influence range water level meter, the pumping well side influence range outside water level meter, the pumping well water level meter, the pumping flow meter, the distribution state of the groundwater level around the pumping well is analyzed. And calculating the pumping amount of the pumping well for lowering the groundwater level to a predetermined water level, the water level meter within the condensate well side influence range, the water level meter outside the condensate well side effect range, the water level meter within the condensate well, Based on each measurement data of the condensate flowmeter, analyze the distribution of groundwater level around the condensate well and calculate the amount of condensate that can be condensate to the processing unit to prevent the condensate from overflowing from the condensate well. Calculated,
Based on the calculation result of the calculation processing unit, the number of rotations of the pump and the opening / closing degree of the flow rate adjustment valve are controlled by the control unit,
A groundwater management method characterized by minimizing the amount of water pumped from the pumping well and maximizing the amount of condensate of the pumped groundwater. The calculation method of the calculation processing unit is:
Measuring the pumping amount of the pumping well with the pumped flow meter;
Measuring the amount of condensate in the condensate well with a condensate flow meter;
The critical water level hrmax set as the highest water level in the condensate well, the water level H0 ′ measured by the water level gauge outside the condensate well side influence range, the water level hr measured by the condensate well water level meter, and the detection Based on the condensate amount Qr, the limit condensate amount Qrmax, which is the maximum value of the condensable amount,
Qrmax = (hrmax−H0 ′) / (hr−H0 ′) × Qr
The process of estimating by
The groundwater management method according to claim 6 , further comprising a step of confirming that the pumped amount is less than a flow rate obtained by multiplying the limit condensate amount by a predetermined safety factor. In the step of confirming that the pumped amount is less than the flow rate obtained by multiplying the limit condensate amount by a predetermined safety factor, the pumped amount is greater than the flow rate obtained by multiplying the limit condensate amount by a predetermined safety factor. In addition, a step of adding a difference amount between the pumped amount and a flow rate obtained by multiplying the limit condensate amount by a predetermined safety factor to the pumped amount of another pumping well, and the pumped amount of the other pumping well is set to another condensate well. The groundwater management method according to claim 7 , wherein the step of confirming that the flow rate is less than a flow rate obtained by multiplying the critical condensate amount by a predetermined safety factor is re-executed. The critical condensate amount is the difference between the head water level of the critical water level set as the maximum value of the water level in the condensate well and the water level gauge outside the condensate well side influence range, the water level of the condensate well water level meter and the condensate well side 9. The groundwater according to claim 7 or 8 , wherein a margin ratio of the head difference is calculated by dividing by a head difference with a water level of an out-of-range water level gauge, and the margin ratio is calculated by multiplying the margin ratio by the amount of condensate. Management method.

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