Multifunctional reservoir water management control line determination method

Abstract

The application discloses a kind of multifunctional reservoir water management control line determination method, comprising the following steps: S1, according to the importance of multiple functions of reservoir and its, determine reservoir water priority order, and its water priority order is expressed as the partition form of reservoir beneficial capacity from bottom to top;S2, according to long series of water and different partition water data, the water storage capacity control line of reservoir meeting the partition water requirement in each time period is determined by using inverse time sequence recursion method, and then the envelope line is determined;S3, the water management control line is determined by using the fusion of each function water guarantee rate and envelope line method.The application can effectively coordinate and solve the multiple function water contradiction problem of reservoir, and has the characteristics of intuitive, efficient, easy to operate and the like.

Description

Technical Field

[0001] This invention relates to the fields of reservoir scheduling and water resource management, specifically a method for determining the control line for water use management in multifunctional reservoirs. Background Technology

[0002] Reservoirs play a crucial role in ensuring economic and social development. With economic and social development, the functions of reservoirs have gradually increased, and the requirements for each function have continuously risen, leading to increasingly prominent contradictions and conflicts in the multi-functional use of reservoirs. Strengthening the management and control of reservoir water resource use and effectively coordinating and resolving the contradictions in the multi-functional use of reservoirs in their current state and planning are prominent issues currently faced. Existing technologies mainly have two characteristics: first, they primarily focus on the impact of inflow water quantity and quality, water users and their water consumption patterns, and optimal comprehensive benefits on the scheduling diagrams and rules of multi-functional reservoirs; second, their scheduling rules express the priority order of water use in multi-functional reservoirs using mathematical models. Addressing the problems of existing technologies in the field of multi-functional reservoir scheduling diagrams and rules, such as the lack of control rules for multi-functional water use and the unintuitive expression of scheduling rules, this invention proposes a method for determining the water use management control line of multi-functional reservoirs. This method uses the water use management control line to divide the beneficial storage capacity of the reservoir scheduling diagram into several priority or restricted water use zones, which can orderly coordinate and resolve the water use contradictions of multiple functions. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention proposes a method for determining the water use management control line of a multi-functional reservoir. By utilizing the water use management control line of a multi-functional reservoir based on the priority of water use, the beneficial storage capacity of the reservoir scheduling diagram is divided into several priority or restriction zones for water use, which can more intuitively and orderly coordinate the water use conflicts of the multi-functional reservoir.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A method for determining the control line for water use management in a multifunctional reservoir includes the following steps:

[0006] S1. Based on the multiple functions and importance of the reservoir, determine the priority order of reservoir water use, and express the priority order of water use as a bottom-up zoning form of the reservoir's beneficial storage capacity;

[0007] For reservoirs with NR functions, their beneficial storage capacity in the scheduling diagram is divided into R1 > R2 > ... > R based on their water use importance. n >...>R NR

[0008] Among them, R n This is the nth partition, which allows water use by the nth function and users who have priority for this function, while restricting water use for other users.

[0009] n = 1, ..., NR, where NR is the total number of reservoir functions.

[0010] S2. Based on long-term water inflow and water use data of different zones, the reverse time-series recursive method is used to determine the reservoir water storage control line that meets the water use requirements of the zone in each period of the year, and then determine its outer envelope.

[0011] S21. Based on long-term inflow and water use data from different zones, the outer envelope V of the reservoir storage capacity of zone n is calculated using a reverse time-series recursive model. n max The specific process is as follows:

[0012] Reverse-time recursive model for reservoir water storage:

[0013] In the formula:

[0014] These represent the initial reservoir water storage capacity in the nth partition during the tth time period of the i-th year;

[0015] These represent the reservoir storage capacity at the end of the t-th time period in the ith partition of the nth year.

[0016] Q i (t) represents the reservoir inflow in the t-th period of the i-th year;

[0017] The amount of water required from the reservoir for the nth function in the tth time period of the i-th year;

[0018] EF n (t) represents the evaporation and seepage amount of the reservoir during the t-th time period of the nth function;

[0019] S22, the V n max The determination method is as follows: using the aforementioned reverse time-series recursive equation for reservoir storage capacity, calculate the annual water storage process line V of the reservoir in the nth partition and the i-th year, which consists of NT storage volumes. n i (T), T=1,...,NT; Determine the maximum water storage capacity of the reservoir at time T in the NI long-term series. Then determine the outer envelope V n max ;in:

[0020] Annual water storage process line

[0021]

[0022] outer envelope

[0023] In the formula: NT represents the number of time periods for dividing the reservoir water use management control line;

[0024] NI represents the number of years for a long series of simulations in a reverse time-series recursive model.

[0025] S3, the water use management control line is determined by combining the water use guarantee rate of each function with the outer envelope method;

[0026] Using the aforementioned reverse-time recursive model of reservoir storage, the water use guarantee rate for each function is integrated with the outer envelope method to determine its water use management control line. The specific process is as follows:

[0027] S31, take the initial value of the water management control line for the nth partition as V. n * =V n max ;

[0028] S32, Select the maximum water storage capacity of the reservoir at the water management control line of the nth zone. T = 1,...,NT, determine the relationship with The second largest water storage volume during the same period Replace with the second largest value Formation of a new outer envelope V n * ;

[0029] S33, using the new outer envelope, calculate the water supply guarantee rate ρ for the nth function and prioritizing that function. n ;

[0030] S34, if The new envelope is then the water management control line for the nth partition; if Then the envelope before replacement is the water management control line for the nth partition; if Then return to step two to form a new outer envelope.

[0031] The beneficial effects of this invention are:

[0032] This invention refines the scheduling diagram and rules of multi-functional reservoirs in a more intuitive way, closely integrates the scheduling diagram of multi-functional reservoirs with the priority of water use, promotes the management and control of water resource use in reservoirs, and orderly coordinates the water use conflicts of multi-functional reservoirs. Attached Figure Description

[0033] Figure 1 This is a flowchart of the method of the present invention;

[0034] Figure 2 This is a schematic diagram of the reservoir utilization capacity zoning based on water use priority order according to the present invention;

[0035] Figure 3 This is a diagram showing the results of the water use management control line for Reservoir A in an embodiment of the present invention. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings.

[0037] like Figure 1 , Figure 2 As shown, this invention takes a multifunctional reservoir A as an example, and its method for determining the water use management control line includes the following steps:

[0038] S1. Based on the functions and importance of Reservoir A, such as water supply, ecological base flow, irrigation, and environmental water replenishment, the priority order of water use for Reservoir A is determined as water supply, ecological base flow, irrigation, and environmental water replenishment. The priority order of water use is expressed as four zones of Reservoir A's beneficial storage capacity from bottom to top, namely R1>R2>R3>R4.

[0039] Among them, R1, R2, R3, and R4 are functional zones for water supply, ecological base flow, irrigation, and environmental water replenishment, respectively.

[0040] R1 is the highest priority zone, which only allows water supply and restricts water use for other functions; R2 is the second priority zone, which allows water supply and ecological base flow water use and restricts water use for other functions; and so on for other zones. This method uses priority or restriction zones to intuitively and orderly coordinate the water use conflicts of the multifunctional reservoir A.

[0041] S2. Based on the long-term inflow data of Reservoir A and the water use data of different zones, the reverse time-series recursive method is used to determine the water storage control line of Reservoir A that meets the water use requirements of the zone in each period of each year, and then determine its outer envelope.

[0042] S21. Based on the long-term inflow data from 1965 to 2019 and the current water use data in 2022, the outer envelope V of the water storage capacity of reservoir A in the four zones is calculated using a reverse time-series recursive model. n max .

[0043] S22, the V n max The determination method is as follows: using the inverse time-series recursive equation for the water storage capacity of reservoir A, calculate the annual water storage process line V of reservoir A, composed of NT water storage volumes, for the i-th year of the n-th partition. n i (T), T=1,...,NT;Determine the maximum water storage capacity of reservoir A at time T in the NI long-term series. Then determine the outer envelope V n max .

[0044] S3 uses a combination of the water use guarantee rate for each function and the outer envelope method to determine its water use management control line; among which: the water supply and ecological base flow water use guarantee rate is 95%, the irrigation water use guarantee rate is 90%, and the environmental water replenishment water use guarantee rate is 80%.

[0045] Using the reverse-time recursive model for the water storage capacity of Reservoir A, the water use guarantee rate for each function is integrated with the outer envelope method to determine its water use management control line. The results are shown in the table below. Figure 3 .

[0046]

[0047] The present invention has been described above with reference to the accompanying drawings, but it should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A method for determining the control line for water use management in a multifunctional reservoir, characterized in that: It includes the following steps: S1. Based on the multiple functions and importance of the reservoir, determine the priority order of reservoir water use, and express the priority order of water use as a bottom-up zoning form of the reservoir's beneficial storage capacity; S2. Based on long-term water inflow and water use data of different zones, the reverse time-series recursive method is used to determine the reservoir water storage control line that meets the water use requirements of the zone in each period of the year, and then determine its outer envelope. S3, the water use management control line is determined by combining the water use guarantee rate of each function with the outer envelope method; Step S2 includes the following sub-steps: S21, based on long-term water inflow and water usage data from different zones, a reverse time-series recursive model is used to calculate the... Outer envelope of reservoir storage capacity The specific process is as follows: Reverse-time recursive model for reservoir water storage: In the formula: The first Partition number Year Initial reservoir water storage at the beginning of the period; The first Partition number Year Reservoir water storage at the end of the period; For the first Year Reservoir inflow during a given period; For the first Function 1 Year The required reservoir water supply during a given period; For the first Function 1 Reservoir evaporation and seepage during a given period; S22, the aforementioned The determination method is as follows: using the aforementioned reverse-time recursive equation for reservoir storage capacity, calculate the first... Partition number Year The annual water storage process of a reservoir consisting of several water storage capacities ;Sure The Senior Series - Years Shike Reservoir's maximum water storage capacity Thus, the outer envelope is determined. ;in: Annual water storage process line ; ； outer envelope ; In the formula: is the number of division periods of the water management control line for the reservoir; The long series simulation calculation years for the inverse time series recursive model; Step S3 includes the following sub-steps: S31, take the first The initial value of the water management control line for each zone is ; S32, select the first Maximum water storage capacity of reservoirs within the zoned water use management control line , , determine and The second largest water storage volume during the same period Replace with the second largest value A new outer envelope is formed. ; S33, using the new outer envelope described above Calculate the first Functions and priorities: Water supply guarantee rate for this function ; S34, if Then the new envelope is the first... Zoned water use management control lines; if Then the envelope before replacement is the first... Zoned water use management control lines; if If so, return to step S2 to form a new outer envelope.

2. The method for determining the control line for water use management in a multifunctional reservoir according to claim 1, characterized in that: In step S1, the multifunctional reservoir is a reservoir with... Reservoirs with different functions are classified according to their water use importance into the following categories based on their utilization capacity in the water allocation diagram: , in, For the first Partition, which allows the first The user with priority for this function can use the water, while other users have their water usage restricted. , This represents the total number of reservoir functions.

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