CN109064055B - Simple dispatching method for small reservoir - Google Patents

Simple dispatching method for small reservoir Download PDF

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CN109064055B
CN109064055B CN201810978524.6A CN201810978524A CN109064055B CN 109064055 B CN109064055 B CN 109064055B CN 201810978524 A CN201810978524 A CN 201810978524A CN 109064055 B CN109064055 B CN 109064055B
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reservoir
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廖小瑞
李俊岭
蔡国成
韩建利
旷世希
郭涛
曹自收
舒雷
杜浩江
陈煜�
刘宇
唐敏
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Anhui Water Water Science And Technology Co ltd
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Abstract

The invention discloses a simple dispatching method for a small reservoir, which comprises the following steps: acquiring a water level-reservoir capacity curve of a reservoir, and constructing a precipitation four-axis three-phase coordinate system of the water level-reservoir capacity-rain accommodating capacity-weather forecast; setting a control water level; and sequentially calculating the rain receiving capacity of different water levels below the control water level in the first quadrant and the fourth quadrant by taking the control water level as a starting point. Establishing a relation line from water level to reservoir capacity to rain holding capacity. Acquiring a real-time water level, and checking and reading rain receiving capacity corresponding to the real-time water level according to a built relation line between the water level and the reservoir capacity and rain receiving capacity; acquiring rainfall of weather forecast, and converging in a third quadrant, wherein when a convergence point is positioned at the left side of a third quadrant angular bisector, the reservoir needs to be subjected to flood discharge in advance; if the reservoir is positioned on the right side, the reservoir does not need to be subjected to flood discharge operation in advance. By applying the invention, the small reservoir can be accurately scheduled.

Description

Simple dispatching method for small reservoir
Technical Field
The invention relates to a reservoir safety flood management method, in particular to a simple dispatching method for a small reservoir.
Background
Reservoir safety is one of the key points of flood prevention, and the national reservoir safety flood fighting video conference in 2018 requires: all reservoirs have monitoring and forecasting capabilities, operation and dispatching schemes, emergency plans and guarantee that all reservoir responsibility personnel are in place.
At present, there are tens of thousands of reservoirs in China, and large and medium-sized reservoirs among them have high design standards and are managed by professional staff. However, small reservoirs (reservoirs with storage capacity less than 1000 ten thousand cubic meters) are wide in points and low in construction standard, mainly use water storage irrigation, mostly carry out water discharging operation according to irrigation requirements, and rarely carry out pre-discharge for flood control. Most typically, most reservoirs are not managed by professional technicians, no scheduling plan exists, and no professional calculation means is used for scheduling implementation. When strong precipitation exists in the weather forecast future, the reservoir dispatching operation is blinded: if the flood is excessively discharged, the waste of water resources in the reservoir can be caused; excessive rainfall can lead to the risk of a dam break if the flood discharge is not in place. Therefore, how to accurately schedule the small reservoir is an urgent technical problem to be solved.
Disclosure of Invention
The invention aims to provide a simple dispatching method for a small reservoir so as to realize accurate dispatching of the small reservoir.
The invention solves the technical problems through the following technical scheme:
the embodiment of the invention provides a simple dispatching method for a small reservoir, which comprises the following steps:
acquiring a water level-storage capacity curve of the reservoir, and sequentially calculating the rain receiving capacities of different water levels below the control water level by taking the control water level as a starting point to acquire a storage capacity-rain receiving capacity relation line of the reservoir;
constructing a four-axis three-phase coordinate system of water level-reservoir capacity-rain capacity-precipitation of weather forecast, wherein a water level-reservoir capacity curve is drawn in a first quadrant, the Y axis of the first quadrant is the water level, and the X axis of the first quadrant is the reservoir capacity of the reservoir; a storage capacity-rain capacity relation line is drawn in the fourth quadrant, and the Y axis of the fourth quadrant is the rain capacity; an angular bisector taking the origin as a starting point is drawn in the third quadrant, and the X axis of the third quadrant is used for each precipitation of the weather forecast;
acquiring the current water level of a reservoir, and checking and reading the current rain receiving capacity corresponding to the real-time water level according to the current water level from the established water level-reservoir capacity-rain receiving capacity relation line;
acquiring rainfall of weather forecast, and intersecting the rainfall with the current rain-receiving capacity in a third quadrant;
judging whether an intersection point between the current rain accepting capacity and the rainfall of the weather forecast is positioned on the left side or the right side of an angular bisector drawn by taking the original point as a starting point in the third quadrant;
if the reservoir is positioned on the left side, the reservoir needs to be drained in advance;
if it is located on the right side, it is not necessary to carry out the flood discharge in advance to the reservoir.
Optionally, the method further includes:
acquiring rain receiving capacity corresponding to the precipitation on an angular bisector in the third quadrant according to the precipitation of weather forecast;
according to the rain accepting capacity, acquiring a corresponding storage capacity on a storage capacity-rain accepting capacity relation line in the fourth quadrant;
and acquiring a water level on a water level-storage capacity curve in the first quadrant according to the storage capacity, and pre-discharging the water level of the reservoir to the water level.
Optionally, the obtaining a water level-storage capacity curve of the reservoir includes:
and acquiring a water level-storage capacity curve of the reservoir according to the topographic data of the reservoir.
Optionally, the obtaining process of the reservoir capacity-rain capacity relation line of the reservoir includes:
using the control water level as a starting point, according to the set water level step length delta Z, using a formula Zi＝ZControl-i.Δ Z, calculating the water level at a distance of i water level steps from the control water level one by one, wherein,
Zithe water level is the water level which is i water level step lengths away from the control water level; zControlA control water level for the reservoir; i is the number of water level step lengths corresponding to the distance control water level; delta Z is the water level step length;
using the formula, Vi＝f(Zi) Calculating the storage capacity corresponding to the water level of the distance control water level i water level step lengths one by one, wherein,
Vifor a water level Z of i water level steps from the control water leveliCorresponding storage capacity; f () is the functional relation between the water level and the reservoir capacity of the reservoir; ziThe water level is the water level which is i water level step lengths away from the control water level;
using the formula,. DELTA.Vi＝VControl-ViCalculating the difference between the reservoir capacity corresponding to the control water level and the reservoir capacity corresponding to the water level at i water level steps from the control water level one by one, wherein,
ΔVithe difference between the reservoir capacity corresponding to the controlled water level and the reservoir capacity corresponding to the water level at a distance of i water level steps from the controlled water level; vControlThe storage capacity corresponding to the water level is controlled; viThe reservoir capacity corresponding to the water level which is i water level steps away from the control water level;
by means of the formula (I) and (II),
Figure BDA0001778008250000031
calculating the rain receiving capacity of the reservoir at different water levels, wherein,
Pnano, iThe rain receiving capacity corresponding to the water level of i water level step lengths away from the control water level; f is the area of the watershed above the reservoir; alpha is a runoff coefficient;
and acquiring a storage capacity-rain capacity relation line of the reservoir according to the rain capacity corresponding to the storage capacity of the reservoir when the water level is controlled to be at each water level step length.
Optionally, the step of obtaining the runoff coefficient of the watershed above the reservoir comprises:
and acquiring the runoff coefficient corresponding to the reservoir according to the early-stage influence rainfall of the basin where the reservoir is located.
Optionally, the checking and reading the rain accepting capability corresponding to the real-time water level according to the established water level-reservoir capacity-rain accepting capability relation line according to the current water level includes:
acquiring a current storage capacity corresponding to the current water level on a water level-storage capacity curve in the first quadrant; and then according to the current storage capacity, acquiring the corresponding current rain accommodating capacity on the storage capacity-rain accommodating capacity relation line in the fourth quadrant.
Compared with the prior art, the invention has the following advantages:
by applying the embodiment of the invention, according to the four-axis three-phase coordinate system of the constructed water level, the reservoir capacity, the rain receiving capacity and the rainfall forecast, the intersection point of the current water level and the forecast rainfall in the four-axis three-phase coordinate system can be obtained, and then whether the reservoir needs to be subjected to pre-flood discharge or not can be judged according to the position of the intersection point, so that the accuracy of reservoir capacity scheduling of the reservoir is improved compared with the blind operation in the prior art.
Drawings
Fig. 1 is a schematic flow chart of a simple dispatching method for a small reservoir according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a four-axis three-phase coordinate system constructed by the simple dispatching method for the small reservoir according to the embodiment of the present invention;
fig. 3 is another schematic flow chart of a simple dispatching method for a small reservoir according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a software structure of a simple dispatching method for a small reservoir according to an embodiment of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
The embodiment of the invention provides a simple dispatching method for a small reservoir, and firstly, the simple dispatching method for the small reservoir provided by the embodiment of the invention is introduced.
Fig. 1 is a schematic flow chart of a simple dispatching method for a small reservoir according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a four-axis three-phase coordinate system constructed by the simple dispatching method for the small reservoir according to the embodiment of the present invention; as shown in fig. 1 and 2, the method includes:
the method comprises the following steps: acquiring a water level-storage capacity curve of the reservoir, and sequentially calculating the rain receiving capacities of different water levels below a control water level by taking the control water level as a starting point to acquire a storage capacity-rain receiving capacity relation line of the reservoir;
specifically, the reservoir capacity curve, V ═ f (z), can be obtained by actually measuring topographic data.
For example, a water level-storage capacity curve of the reservoir can be obtained according to the topographic data of the reservoir. The reservoir capacity can be calculated from the watershed area of the reservoir. The basin area of the reservoir can be calculated by drawing the basin boundary according to the contour line by a 1-to-fifty-thousand topographic map and measuring the catchment area of the reservoir, or by adopting DEM (Digital Elevation Model) software.
Then drawing a relation line of reservoir capacity-rain capacity, firstly taking the control water level as a starting point, and according to the set water level step length delta Z, utilizing a formula, Zi＝ZControl-i · Δ Z, calculating the water level at a distance control level of i water level steps one by one, wherein ZiThe water level is the water level which is i water level step lengths away from the control water level; zControlA water level corresponding to the control water level of the reservoir, i.e. a set maximum water level of the reservoir, which is usually smaller than the upper limit of the water level; i is the number of water level step lengths corresponding to the distance control water level; and deltaz is the water level step.
Reuse formula，Vi＝f(Zi) Calculating the storage capacity corresponding to the water level of the distance control water level i water level step lengths one by one, wherein ViFor a water level Z of i water level steps from the control water leveliCorresponding storage capacity; ziThe water level is the water level which is i water level step lengths away from the control water level; f () is a function of the relation between the water level and the reservoir capacity of the reservoir.
Reuse formula, Δ Vi＝VControl-ViCalculating the difference between the reservoir capacity corresponding to the control water level and the reservoir capacity corresponding to the water level at a distance of i water level steps from the control water level one by one, wherein, the difference is delta ViThe difference between the reservoir capacity corresponding to the controlled water level and the reservoir capacity corresponding to the water level at a distance of i water level steps from the controlled water level; vControlThe water level is the reservoir capacity when the water level reaches the control water level; viIs the reservoir corresponding to the water level with i water level step lengths away from the control water level.
Then the formula is utilized to obtain the final product,
Figure BDA0001778008250000051
and calculating the rain receiving capacity of the reservoir at different water levels. When calculating the rain-receiving capacity of the reservoir, Δ ViFor the difference P between the corresponding storage capacity of the reservoir at the time of controlling the water level of the reservoir and the current water levelNano, iThe rain receiving capacity corresponding to the water level of i water level step lengths away from the control water level; f is the area of the watershed above the reservoir; alpha is the runoff coefficient. In practical application, the runoff coefficient corresponding to the reservoir can be obtained according to the early-stage influence rainfall of the watershed where the data is located; in addition, the runoff coefficient can be obtained by the work result of flood forecast preposition preparation of the place where the reservoir belongs to the early-stage influence rainfall P of the regional grid of the reservoir basinaDetermining a runoff coefficient alpha; the alpha value may also be input empirically.
By utilizing the calculation process, the storage capacity of the reservoir at each water level step length from the control water level can be obtained, and then the rain receiving capacity corresponding to the storage capacity of the reservoir at each water level step length from the control water level can be obtained, and further the storage capacity-rain receiving capacity relation line of the reservoir can be obtained.
Step two: constructing a four-axis three-phase coordinate system of water level-reservoir capacity-rain capacity-precipitation of weather forecast, wherein a water level-reservoir capacity curve is drawn in a first quadrant, the Y axis of the first quadrant is the water level, and the X axis of the first quadrant is the reservoir capacity of the reservoir; a storage capacity-rain capacity relation line is drawn in the fourth quadrant, and the Y axis of the fourth quadrant is the rain capacity; an angular bisector taking the origin as a starting point is drawn in the third quadrant, and the X axis of the third quadrant is used for each precipitation of the weather forecast;
specifically, as shown in fig. 2, the horizontal axis is the X axis, and the vertical axis is the Y axis. A water level-storage capacity curve 201 is drawn in the first quadrant, the X axis is the storage capacity of the reservoir, the upper limit value is the storage capacity when the water level of the reservoir reaches the upper limit of the water level, and the lower limit is the dead storage capacity of the reservoir; the Y axis of the first quadrant is the water level of the reservoir, the upper limit value is the top degree of a spillway or flood limit water level of the reservoir, and the lower limit value is the water level when the reservoir reaches the dead reservoir capacity.
A storage capacity-rain capacity relation line 202 is drawn in the fourth quadrant, the X axis is the storage capacity of the reservoir, the upper limit value is the storage capacity when the water level of the reservoir reaches the upper limit of the water level, and the lower limit is the dead storage capacity of the reservoir; the Y axis of the first quadrant is the rain accommodating capacity of the reservoir, the upper limit is the difference between the reservoir capacity and the dead reservoir capacity when the water level of the reservoir reaches the top degree of a spillway or the flood limit water level, and the lower limit is zero.
An angular bisector 203 taking the origin as a starting point is drawn in the third quadrant, and the X axis of the third quadrant is used for each precipitation of the weather forecast; in practical applications, the third quadrant may be divided into a plurality of regions according to the relation between the weather forecast precipitation and rainstorm, heavy rainstorm and extra heavy rainstorm, as shown in fig. 2.
And a model drawing of the reservoir is drawn in the second quadrant, so that the reservoir model drawing is convenient for users to understand.
It is emphasized that the data required for constructing the four-axis three-phase coordinate system of water level-reservoir capacity-rainfall amount of the weather forecast can be obtained from a hydrological database table according to the station code of the reservoir, for example, can be obtained from a basic information table, a flood limiting water level table and a reservoir capacity curve table.
Step three: and acquiring the current water level of the reservoir, and checking and reading the current rain receiving capacity corresponding to the real-time water level according to the current water level through the established relation line from the water level to the reservoir capacity to the rain receiving capacity.
Specifically, the real-time water level of the reservoir is acquired according to the water level monitoring device for the reservoir, and a point 204 corresponding to the real-time water level is acquired on the water level-reservoir capacity curve 201 in the first quadrant according to the real-time water level. And then the current storage capacity of the reservoir corresponding to the point is obtained according to the projection of the point 204 on the X axis in the first quadrant. Specifically, a straight line parallel to the X-axis may be drawn with the real-time water level as a starting point, and an intersection point of the straight line and the water level-reservoir capacity curve 201 in the first quadrant is a point 204 corresponding to the real-time water level. Similarly, a straight line parallel to the Y-axis may be drawn from the point 204 corresponding to the real-time water level, and an intersection point of the straight line and the X-axis in the first quadrant is a projection point of the point 204 on the X-axis in the first quadrant. The current water level may be obtained from a real-time water regime table.
Then, from the projected point of the point 204 on the X-axis of the first quadrant, a point 206 having the same projected point as the point 204 on the X-axis of the first quadrant is found on the library rain holding capacity relationship line 202. And the value corresponding to the projection point of the point 206 on the Y axis of the fourth quadrant is the current rain holding capacity corresponding to the reservoir.
Step four: acquiring rainfall of weather forecast, and intersecting the current rain accommodating capacity in a third quadrant;
specifically, the local future weather forecast result is obtained according to the weather forecast, and the local future weather forecast result comprises a grid numerical forecast result directly from the database and a weather forecast result from the local weather station, so that the precipitation 208 in a future preset period is obtained.
And acquiring an intersection 2010 of the two straight lines in the fourth quadrant according to the straight line parallel to the Y axis where the precipitation 208 is positioned and the straight line parallel to the X axis where the point 206 is positioned.
It is emphasized that the precipitation in the preset period can be obtained from the weather database table according to the station code of the reservoir, for example, from a weather future precipitation numerical result or an interactive input precipitation forecast result.
Step five: judging whether an intersection point between the current rain accepting capacity and the precipitation amount is positioned on the left side or the right side of an angular bisector which is drawn in the third quadrant and takes an original point as a starting point; if the reservoir is positioned on the left side, the reservoir needs to be drained in advance; if it is located on the right side, it is not necessary to carry out the flood discharge in advance to the reservoir.
Judging whether the intersection 2010 is positioned on the left side or the right side of the angular bisector 203 of the third quadrant, and if the intersection is positioned on the left side, performing pre-flood discharge on the reservoir; if it is located on the right side, it is not necessary to carry out the flood discharge in advance to the reservoir.
In practical applications, the junction 2010 may be displayed in a red dot in a blinking manner on the interface shown in fig. 2 through the mobile phone APP.
By applying the embodiment shown in fig. 1 of the invention, according to the four-axis three-phase coordinate system of the constructed water level, the reservoir capacity, the rain capacity and the rainfall of the weather forecast of the member, the intersection point of the current water level and the rainfall in the preset period in the four-axis three-phase coordinate system can be obtained, and then whether the reservoir needs to be drained in advance or not can be judged according to the position of the intersection point, so that the accuracy of reservoir capacity scheduling of the reservoir is improved compared with the blind operation in the prior art.
Finally, the embodiment of the invention can be loaded in a mobile phone APP to automatically calculate whether the reservoir needs to be flooded in advance, so that the requirement on the professional performance of operators and the management difficulty of reservoir scheduling are reduced, and the use of users is facilitated.
In addition, the invention fully considers the fact that the flood control standard of the small reservoir is low, the reservoir distribution points are diversified, most managers belong to non-professional technicians, and the simple dispatching is realized by means of a public platform, fusion of professional algorithms and mobile phone APP, so that the method is a reference means for reservoir safety flood control. It is emphasized that the embodiment of the invention only takes the water level at (below) the crest elevation of the spillway as the characteristic water level control and predicts the flood control measures of early pre-discharge under the condition of strong rainfall in the future, and is the supplement of the safety of the reservoir under the design background.
On the basis of the embodiment shown in fig. 1 of the invention, the embodiment shown in fig. 3 of the invention also provides another simple dispatching method for small reservoirs.
Fig. 3 is another schematic flow chart of a simple dispatching method for a small reservoir according to an embodiment of the present invention, and as shown in fig. 3, the method further includes:
step six: and acquiring the rain receiving capacity corresponding to the precipitation amount on an angular bisector in the third quadrant according to the precipitation amount in a preset period.
Specifically, according to the precipitation amount 208 in the preset period, a point 2012 corresponding to the precipitation amount is obtained on an angular bisector in the third quadrant, and the rain accepting capacity corresponding to a projection point of the point 2012 on the Y axis of the third quadrant is the rain accepting capacity corresponding to the precipitation amount.
Step seven: and acquiring a corresponding storage capacity on a storage capacity-rain capacity relation line in the fourth quadrant according to the rain capacity.
And taking the projection point of the rain accepting capacity of the reservoir on the angular bisector of the third quadrant acquired in the sixth step as a starting point, drawing a straight line parallel to the X axis, and taking the storage capacity corresponding to the projection point of the intersection 2014 of the straight line and the storage capacity-rain accepting capacity relation line in the fourth quadrant on the X axis of the fourth quadrant as the storage capacity.
Step eight: and acquiring a water level on a water level-storage capacity curve in the first quadrant according to the storage capacity, and pre-discharging the water level of the reservoir to the water level.
And taking the reservoir capacity obtained in the seventh step as a starting point, drawing a straight line parallel to the Y axis, wherein the water level corresponding to the projection point 2016 of the straight line and the water level-reservoir capacity curve 201 in the first quadrant on the Y axis of the first quadrant is the water level which the reservoir needs to reach, and then discharging the water level of the reservoir to the water level corresponding to the intersection point 2016.
By applying the embodiment of the invention, the water level of the reservoir needing flood discharge can be predicted, and the storage capacity of the reservoir can be accurately scheduled.
Fig. 4 is a schematic diagram of a software structure of a simple dispatching method for a small reservoir according to an embodiment of the present invention, as shown in fig. 4,
the software comprises a cloud end and an application end, wherein,
the high in the clouds includes: the system comprises an industrial condition database, a rainwater condition database and a meteorological product database, wherein various data required for reservoir scheduling are stored in the databases.
The application end comprises: the reservoir management APP has the functions of user login, rainwater condition query, flood reporting, scheduling, information, setting and the like.
The application end can be connected with the cloud data source through the existing communication network.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (4)

1. A simple dispatching method for small reservoirs is characterized by comprising the following steps:
acquiring a water level-storage capacity curve of the reservoir, and sequentially calculating the rain receiving capacities of different water levels below the control water level by taking the control water level as a starting point to acquire a storage capacity-rain receiving capacity relation line of the reservoir;
constructing a four-axis three-phase coordinate system of water level-reservoir capacity-rain capacity-precipitation of weather forecast, wherein a water level-reservoir capacity curve is drawn in a first quadrant, the Y axis of the first quadrant is the water level, and the X axis of the first quadrant is the reservoir capacity of the reservoir; a storage capacity-rain capacity relation line is drawn in the fourth quadrant, and the Y axis of the fourth quadrant is the rain capacity; an angular bisector taking the origin as a starting point is drawn in the third quadrant, and the X axis of the third quadrant is used for each precipitation of the weather forecast;
acquiring the current water level of a reservoir, and checking and reading the current rain receiving capacity corresponding to the real-time water level according to the current water level from the established water level-reservoir capacity-rain receiving capacity relation line;
acquiring rainfall of weather forecast, and intersecting the rainfall with the current rain-receiving capacity in a third quadrant;
judging whether an intersection point between the current rain accepting capacity and the rainfall of the weather forecast is positioned on the left side or the right side of an angular bisector drawn by taking the original point as a starting point in the third quadrant;
if the reservoir is positioned on the left side, the reservoir needs to be drained in advance;
if the reservoir is positioned on the right side, the reservoir does not need to be drained in advance;
further comprising:
when pre-drainage is needed through the judgment, acquiring rain receiving capacity corresponding to the rainfall on an angular bisector in the third quadrant according to the rainfall of weather forecast;
according to the rain accepting capacity, acquiring a corresponding storage capacity on a storage capacity-rain accepting capacity relation line in the fourth quadrant;
and acquiring a water level on a water level-storage capacity curve in the first quadrant according to the storage capacity, wherein the water level is a target water level of pre-draining operation.
2. The simple dispatching method for small reservoir according to claim 1, wherein the obtaining of the water level-reservoir capacity curve of the reservoir comprises:
and acquiring a water level-storage capacity curve of the reservoir according to the topographic data of the reservoir.
3. The simple dispatching method for small reservoir according to claim 1, wherein the step of calculating the rain accepting capacity of different water levels below the control water level in sequence by taking the control water level as a starting point to obtain the reservoir capacity-rain accepting capacity relation line of the reservoir comprises the following steps:
using the control water level as a starting point, calculating the water level of i water level steps from the control water level one by one according to a set water level step Delta Z and a formula of Z i which is Z control-i.Delta Z, wherein,
zi is the water level at i water level step lengths away from the control water level; z is the control water level of the reservoir; i is the number of water level step lengths corresponding to the distance control water level; delta Z is the water level step length;
using a formula of V i ═ f (z i), the storage capacity corresponding to the water level at a distance of i water level steps from the control water level is calculated one by one, wherein,
vi is a reservoir capacity corresponding to the water level Zi which is i water level steps away from the control water level; f () is a relation function between the water level and the reservoir capacity of the reservoir; z i is the water level i water level steps from the control water level;
using a formula, wherein delta V i is V-control-V i, calculating the difference between the reservoir capacity corresponding to the control water level and the reservoir capacity corresponding to the water level at i water level steps from the control water level one by one, wherein,
v is controlled to control the storage capacity corresponding to the water level; vi is a reservoir capacity corresponding to a water level which is i water level steps away from the control water level;
calculating the rain receiving capacity of the reservoir at different water levels one by using a formula, wherein,
p is the rain receiving capacity corresponding to the water level with the distance of i water level step lengths from the control water level; f is the area of the watershed above the reservoir; alpha is the runoff coefficient.
4. The simple dispatching method for the small reservoir according to claim 3, wherein the step of obtaining the runoff coefficient corresponding to the reservoir comprises:
and acquiring the runoff coefficient of the reservoir according to the early-stage influence rainfall of the basin where the reservoir is located.
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