A river diversion scheme optimization adjustment method

Abstract

This invention discloses a method for optimizing and adjusting a river water allocation scheme. The method includes: 1. Defining the water allocation indicators for each water supply area within and outside the river channel of a river with an implemented water allocation scheme; 2. Determining the base year and horizontal year for adjusting the river water allocation scheme, and predicting the water demand of each water supply area outside the river channel and the water demand within the river channel in the horizontal year; 3. Calculating the adjustable water reduction indicators for each water supply area outside the river channel and within the river channel in the horizontal year based on the prediction results, and calculating the adjustable water volume indicators for optimizing the river water allocation scheme in the horizontal year; 4. Establishing quantitative indicators of water use efficiency using existing allocation coefficient methods and opportunity cost methods; 5. Establishing quantitative indicators of water use fairness using the Gini coefficient; 6. Establishing and solving an adjustable water volume optimization allocation model to obtain the allocation scheme of the adjustable water reduction indicators; 7. Calculating the optimized water volume indicators for each water supply area within and outside the river channel after optimization and adjustment in the horizontal year, thus obtaining the optimized and adjusted river water allocation scheme.

Description

Technical Field

[0001] This invention relates to a method for river water diversion, and more specifically to a method for optimizing and adjusting a river water diversion scheme. Background Technology

[0002] my country's water resources are unevenly distributed in time and space, and the water resources of many rivers are insufficient to meet the needs of economic and social development and ecological protection in their basins, leading to prominent conflicts over water resources between river channels and upstream and downstream areas, and between left and right banks. To address these issues, my country has successively promulgated and implemented several river water allocation schemes, such as the Yellow River water availability allocation scheme, the Heihe River main stream water allocation scheme, and the Tarim River basin "four sources and one main stream" surface water allocation scheme. These schemes have played an important role in alleviating water resource conflicts and scientifically allocating water resources in river basins.

[0003] With rapid economic and social development and the intensifying impact of climate change, the water resource conditions and water supply and demand of many rivers have undergone drastic changes. Some river water allocation schemes, which have been in operation for many years, face new challenges such as changes in baseline conditions, insufficient ecological water security, and unbalanced regional development, urgently requiring optimization and adjustment. However, there are no precedents for adjusting river water allocation schemes in my country, and there is little international experience to draw upon, resulting in a lack of scientific methodological references for optimizing and adjusting river water allocation schemes. Summary of the Invention

[0004] The purpose of this invention is to provide a method for optimizing and adjusting river water allocation schemes, thereby improving the economic benefits and fairness of water resource development and utilization through scientific adjustment of river water allocation schemes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The method for optimizing and adjusting river water distribution schemes according to the present invention includes the following steps: Step S101: First, clarify the water allocation indicators for each water supply area inside and outside the river channel of the river for which the river water allocation plan has been implemented; Step S102: Determine the base year and horizontal year for adjusting the river water distribution scheme, and predict the water demand of each water supply area outside the river channel and the water demand inside the river channel in the horizontal year; Step S103: Based on the river water allocation scheme and the predicted water demand of each water supply area outside the river channel and the water demand inside the river channel in the horizontal year, calculate the adjustable water volume index of each water supply area outside the river channel and inside the river channel in the horizontal year, and calculate the adjustable water volume index used for optimization of the river water allocation scheme in the horizontal year. Step S104: Using the existing allocation coefficient method and opportunity cost method, establish a quantitative index for water use efficiency to calculate the water use efficiency generated by the optimization and adjustment scheme; Step S105: Using the Gini coefficient, establish a quantitative index for water use equity to calculate the degree of fairness of the optimized adjustment scheme in water resource allocation; Step S106: Establish an adjustable water volume optimization allocation model that takes into account both fairness and efficiency, solve the adjustable water volume optimization allocation model, and obtain the allocation scheme of the adjustable water volume reduction index. Step S107: Calculate the optimized water volume indicators for each water supply area inside and outside the river channel after the horizontal year optimization adjustment, and obtain the optimized river water allocation scheme.

[0006] Optionally, in step S101, the calculation formula for the water allocation index is as follows: ;in: W represents the river's average annual natural runoff, measured in m³. IN-O The water allocation quota within the river channel under the aforementioned river water allocation scheme is expressed in m³; i represents the water supply area number outside the river channel involved in the river water allocation scheme, i = 1, 2, ..., N; W OUT-O,i The water allocation quota for the i-th water supply area outside the river channel is given by the river water allocation scheme, in m³.

[0007] Optionally, in step S102, the base year should be selected as the year that is closest to the current level of economic and social development and normal hydrological conditions, and meets the relevant data requirements; the horizontal year should be selected as a future year with a time difference greater than 10 years from the base year; the water demand of each water supply area outside the river channel in the horizontal year is predicted using the quota method, including water demand for domestic, industrial, agricultural and ecological environments outside the river channel; the prediction of water demand within the river channel is as follows: the control section of the river mouth hydrological station is selected, and the demand for aquatic organisms, sediment transport, plastic channel and navigation is comprehensively considered according to the river characteristics, and the calculation is performed using hydrological methods, hydraulic methods, habitat simulation methods or overall analysis methods.

[0008] Optionally, in step S103, the formula is used. The adjustable water reduction index for each water supply area outside the river channel is calculated for each horizontal year; where: R OUT , i L represents the adjustable water reduction index for the i-th water supply area outside the river channel in a horizontal year, in m³. OUT , i D represents the available water volume of local groundwater, unconventional water sources, and diverted water in the i-th water supply area outside the river channel in a horizontal year, in m³. OUT,i R represents the water demand of the i-th water supply area outside the river channel in a horizontal year, in m³; when R OUT , i When the value is greater than 0, it indicates that the i-th water supply area outside the river channel in the horizontal year has the potential to reduce the water volume index. According to R OUT , iThe values ​​are used to reorder the water supply areas outside the river channel, with those having the potential to reduce water volume indices ranked first, and those not having such potential ranked last. After reordering, the water supply areas outside the river channel are numbered i′, and their numbers range from 1 to N. R Water supply area outside the river channel R OUT , i′ >0, numbered N R Water supply area outside the river channel R (+1~N) OUT , i′ ≤0; N R The number of off-channel water supply areas with the potential for adjustable water volume reduction; Using the formula, Calculate the adjustable water reduction index within the river channel in the horizontal year, wherein: E C The annual adjustable water volume within the river channel, expressed in m³; L IN D represents the planned amount of water used for ecological replenishment within the river channel from unconventional water sources and external water transfers in a horizontal year, expressed in m³. IN The annual water demand in the river channel is expressed in m³; when E C When the value is greater than 0, it indicates that the river channel has the potential to reduce water volume in a horizontal year. Using formula The adjustable water quantity index used to optimize the river water allocation scheme for the calculated horizontal year is as follows: R T The adjustable water volume index for the horizontal annual river water allocation scheme is expressed in m³; when R T When R > 0, the river water diversion scheme can be optimized and adjusted; when R T When the value is ≤0, the river water diversion scheme cannot be optimized or adjusted.

[0009] Optionally, in step S104, establishing quantitative indicators for water use efficiency includes: ① Establish quantitative indicators for agricultural water use efficiency: For N with number i′ R For water supply areas outside the river channel ranging from +1 to N, the apportionment coefficient method is used, employing the formula... Calculate the water use benefits resulting from increasing agricultural water supply, including: V i′,1 The agricultural water use benefits generated by increasing agricultural water supply to the i′th water supply area outside the river channel in the aforementioned horizontal year are expressed in yuan; A i′,1 Q represents the increase in agricultural water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water allocation scheme, expressed in m³. i′ Y represents the average agricultural water consumption per mu (unit of land area) in the i′-th water supply area outside the river channel during a horizontal year, expressed in m³ / mu. i′The average economic benefit per mu (unit of land area) for agriculture in the i′th water supply area outside the river channel in a horizontal year includes the economic benefits of main and by-products of crops, expressed in yuan / mu; C i′,1 The contribution rate of agricultural water supply to agricultural economic benefits in the i′th water supply area of ​​the horizontal year is dimensionless and ranges from [0,1]. ② Establish quantitative indicators for industrial water use efficiency: For example, for N with the number i′... R For water supply areas outside the river channel ranging from +1 to N, the apportionment coefficient method is used, employing the formula... Calculate the water use benefits resulting from increasing industrial water supply, including: V i′,2 The industrial water use benefits generated by increasing industrial water supply to the i′th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,2 M represents the increase in industrial water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water allocation scheme, expressed in m³. i′ C represents the industrial added value generated per m³ of industrial water use in the i′-th water supply area outside the river channel in a horizontal year, expressed in yuan / m³. i′,2 The contribution rate of industrial water supply to industrial economic benefits in the i′th water supply area of ​​the horizontal year is dimensionless and ranges from [0,1].

[0010] ③ Establish quantitative indicators for domestic water use efficiency: For example, for the indicator numbered i′ as N R For the water supply area outside the river channel from +1 to N, using the opportunity cost method, assuming that an equal amount of industrial water use is sacrificed when the available water is used for domestic water use, and using the formula... Calculate the water use benefits resulting from the increase in domestic water supply, including: V i′,3 The domestic water use benefits generated by increasing the domestic water supply in the i′-th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,3 This represents the increase in domestic water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water distribution scheme, expressed in m³. ④ Establish quantitative indicators for ecological and environmental water use benefits: For example, for index i′ of N... R For the water supply area outside the river channel from +1 to N, using the opportunity cost method, it is assumed that when the available water is used for ecological and environmental water use, an equivalent amount of industrial water use is forgone. Using the formula... Calculate the water use benefits resulting from the increased ecological water supply, including: V i′,4 The ecological and environmental water use benefits generated by increasing the ecological and environmental water supply to the i′th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,4 The unit is m³, which represents the increase in ecological water supply to the i′th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water distribution scheme.

[0011] ⑤ Based on the quantitative indicators of water use efficiency in agriculture, industry, domestic use, and the ecological environment, establish the total water use efficiency; for the number i′ as N R For water supply areas outside the river channel ranging from +1 to N, using the formula, , , Calculate the total water use benefits generated by different optimization and adjustment schemes, where: V is the number N R The total water use benefits generated by the annual increase in water supply in the external water supply areas from +1 to N, expressed in yuan; k is the industry code for external water supply, dimensionless, k=1,2,3,4, representing agriculture, industry, domestic, and ecological environment, respectively; F V V is a quantitative indicator of water use efficiency, dimensionless, with a value range of [0,1]. A larger value indicates higher water use efficiency. MIN V represents the lower limit of the water use benefits generated by the increased water supply outside the river channel in a horizontal year, expressed in yuan. MAX The upper limit of the water use benefits generated by the increased water supply outside the river channel in a horizontal year, expressed in yuan.

[0012] Optionally, in step S105, the water fairness quantification index includes: ① Establish quantitative indicators for water user satisfaction: For numbered i′ as N R For water supply areas outside the river channel ranging from +1 to N, using the formula, , Calculate the water user satisfaction of various industries in each water supply area outside the river channel, including: P i′,k W represents the water shortage rate of the k-th industry in the i′-th water supply area outside the river channel in the horizontal year. It is dimensionless and ranges from [0,1]. OUT-O,i′,k The water allocation quota, in m³, is the water quantity allocated to the k-th industry in the i′-th water supply area outside the river channel under the current river water allocation scheme. If the current river water allocation scheme does not allocate water to the k-th industry, it can be replaced by the water quantity actually allocated to the k-th industry in the i′-th water supply area under the multi-year average inflow scenario, which should satisfy the following conditions. L OUT,i′,k D represents the available water supply from local groundwater, unconventional water sources, and diverted water to the k-th industry in the i′-th water supply area outside the river channel in a horizontal year, in m³. OUT-O,i′,k S represents the water demand of the k-th industry in the i′-th water supply area outside the river channel in a horizontal year, in m³. i′,k S represents the water satisfaction of the k-th industry in the i′-th water supply area outside the river channel in a horizontal year. It is dimensionless and its value ranges from [0,1]. 1,i′,k and S 2,i′,kAll values ​​represent the satisfaction levels corresponding to the inflection points on the water use satisfaction curves of the i′-th water supply area and the k-th industry outside the river channel in a horizontal year. These values ​​are dimensionless, and their locations are illustrated in the diagram below. Figure 1 It should satisfy 0≤S 1,i′,k <S 2,i′,k ≤1, the number and values ​​of inflection points should be set according to the actual situation; P 1,i′,k and P 2,i′,k S on the water satisfaction curve 1,i′,k and S 2,i′,k The corresponding water shortage rate, and its location diagram are shown below. Figure 1 It should satisfy 0≤P 2,i′,k <P 1,i′,k ≤1; ② Quantitative indicators for water use fairness among water supply areas outside the river channel: For example, for water supply areas numbered i′ as N R For water supply areas outside the river channel ranging from +1 to N, the Gini coefficient is used, and the formula is applied. , Calculate the fairness of water use among the various water supply areas outside the river channel, where: Z i′ Z represents the average water satisfaction of all industries in the i′-th water supply area outside the river channel during a horizontal year. It is dimensionless and ranges from [0,1]. i′ ′ for Z i′ The sequence generated by arranging the data in ascending order is dimensionless; G Z The Gini coefficient represents the fairness of water use among different water supply areas outside the river channel. It is dimensionless and ranges from [0,1]. A larger value indicates greater unfairness in water use among the areas. h is an intermediate variable, and N is a variable that represents fairness among water supply areas. R +1≤h≤N-1, dimensionless; ③ Establish quantitative indicators for water use fairness among various industries outside the river channel: For example, for N... R For water supply areas outside the river channel ranging from +1 to N, the Gini coefficient is used, and the formula is applied. , Calculate the fairness of water use among various industries outside the river channel, among which, O k Let $\frac{ ... k ′ is to O k Rearrange the sequences in ascending order to generate a new, dimensionless sequence; G O is the Gini coefficient representing the fairness of water use among various industries outside the river channel. It is dimensionless and ranges from [0,1]. A larger value indicates greater unfairness in water use among industries. h is an intermediate variable, 1≤h≤3, and is dimensionless. ④ Based on the aforementioned quantitative indicators of water use equity among different water supply areas outside the river channel and among different industries outside the river channel, establish a quantitative indicator of water use equity, using the formula... Calculate the fairness of different optimization and adjustment schemes in water resource allocation, where: F E It is a quantitative indicator for water use fairness, used to characterize the degree of water use fairness between water supply areas outside the river channel and between industries. It is dimensionless and has a value range of [0,1]. The larger the value, the fairer the water use.

[0013] Furthermore, step S106 also includes: ① Establish the objective function of the adjustable water allocation optimization model, and use the formula, This provides evaluation criteria and optimization directions for the optimal allocation of adjustable water volume, including: T AR The objective of the adjustable water allocation model is dimensionless and ranges from [0,1]. A larger value indicates a better adjustable water allocation scheme. α is the weight of the water use equity quantitative index, which is dimensionless and ranges from [0,1]. The value of α is set according to the actual situation and the decision-maker's preference. A larger value indicates that more importance is attached to water use equity during allocation. ② Establish the constraints of the adjustable water allocation model, using the formula, , Define the feasible region of the solution, where: U i′,k The water supply capacity of the project to the k-th industry in the i′-th water supply area outside the river channel in a horizontal year is expressed in m³. ③ Determine the solution algorithm for the adjustable water allocation model: Based on the computational complexity, use a genetic algorithm or particle swarm optimization algorithm to solve the adjustable water allocation model and obtain the optimal solution, i.e., the objective function T. AR The increase in water supply A in each water supply area and industry outside the river channel when the value is maximized. BEST,i′,k .

[0014] Optionally, in step S107, the optimized water quantity index includes: ① Using the formula, The optimized and adjusted water volume index in the river channel for the aforementioned horizontal year is obtained, wherein: W IN-C The water volume index in the river channel after the horizontal year optimization adjustment is expressed in m³. ② Using the formula, The water volume indicators for each water supply area outside the river channel after the horizontal year optimization and adjustment are obtained, where: W OUT-C,i′The water volume index for the i′th water supply area outside the river channel after the horizontal year optimization adjustment is given, in m³.

[0015] This invention prioritizes ecological water use within river channels, embodying the principle of "ecological priority" and contributing to river ecological protection. Secondly, it establishes quantifiable indicators of water use efficiency for different industries, guiding water resources allocation towards sectors with higher economic benefits per unit of water consumption, thereby improving water use efficiency. Simultaneously, it establishes quantifiable indicators of water use fairness between regions and industries, helping to coordinate water use relationships between upstream and downstream areas, left and right banks, and industries, reducing water-related disputes. Furthermore, it establishes an adjustable water allocation optimization model that balances fairness and efficiency, reconciling the two important and conflicting objectives of water use fairness and efficiency, and improving the feasibility of optimizing and adjusting river water allocation schemes. This invention provides crucial technical support for water administrative departments at all levels and river basin management agencies to carry out water allocation scheme optimization and adjustment work. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the water satisfaction curve provided in an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, the method for optimizing and adjusting the river water distribution scheme of the present invention includes the following steps: S101: For a river for which a river water allocation scheme has been implemented, specify the water allocation indicators for different water supply areas inside and outside the river channel under the river water allocation scheme.

[0020] Specifically, for a river that has already implemented a river water allocation scheme, the scheme distributes the river's multi-year average natural runoff to N water supply areas both inside and outside the river channel. Using the formula... The water allocation indicators for different water supply areas inside and outside the river channel under the river water allocation scheme are clearly defined, including: W represents the river's average annual natural runoff, measured in m³. IN-OThe water allocation quota within the river channel under the river water allocation scheme is expressed in m³; i represents the water supply area number outside the river channel involved in the river water allocation scheme, i = 1, 2, ..., N; W OUT-O,i The water allocation quota for the i-th water supply area outside the river channel is given by the river water allocation scheme, in m³.

[0021] S102: Determine the base year and horizontal year for adjusting the river water allocation plan, and predict the water demand in different water supply areas outside the river channel and the water demand within the river channel in the horizontal year. The specific process is as follows: ① Determine the base year for adjusting the river water allocation plan. The base year should be the year that is closest to the current level of economic and social development and normal hydrological conditions, and meets the relevant data requirements.

[0022] ② Determine the horizontal year for adjusting the river water allocation scheme; considering the difficulty and time-consuming nature of adjusting the river water allocation scheme, the horizontal year should be a future year with a time difference of no less than 10 years from the base year.

[0023] ③ Using the quota method, predict the water demand D of different water supply areas outside the river channel in a horizontal year. OUT , i The unit is m³. D OUT , i This includes water needs for domestic, industrial, agricultural, and ecological environments outside river channels. For the quota method, please refer to the relevant requirements and explanatory notes of the "Water Resources Planning Code" (GB / T51051).

[0024] ④ Select the control section of the river mouth hydrological station. Based on the river characteristics, comprehensively consider the needs of aquatic organisms, sediment transport, plastic channel, and navigation. From hydrological methods, hydraulic methods, habitat simulation methods, and overall analysis methods, select an appropriate method to calculate the annual water demand D in the river channel. IN The unit is m³. The calculation method for water demand in river channels can refer to the relevant requirements and explanatory notes of the "Specification for Calculation of Water Demand for River and Lake Ecological Environment" (SL / T 712).

[0025] S103: Based on the river water allocation scheme and the predicted water demand in different water supply areas outside the river channel and within the river channel in a horizontal year, calculate the adjustable water volume indicators for different water supply areas outside the river channel and within the river channel in a horizontal year, and calculate the adjustable water volume indicators that can be used for optimization of the river water allocation scheme in a horizontal year. The specific process is as follows: ① Based on the river water allocation plan and the predicted water demand of different water supply areas outside the river channel in a horizontal year, the formula is used. Calculate the adjustable water volume index for different water supply areas outside the river channel in a horizontal year, including: R OUT , i L represents the adjustable water reduction index for the i-th water supply area outside the river channel in a horizontal year, in m³. OUT ,i This represents the available water supply volume (m³) for the i-th water supply area outside the river channel in a horizontal year, including local groundwater, unconventional water sources, and water diverted from other sources. OUT , i When R > 0, it indicates that the i-th water supply area outside the river channel in a horizontal year has the potential to reduce the water volume index; when R OUT , i When R = 0, it indicates that the water volume index of the i-th water supply area outside the river channel in the horizontal year does not have the potential for reduction; when R OUT , i When the value is less than 0, it indicates that the water volume index of the i-th water supply area outside the river channel in the horizontal year does not have the potential for reduction and needs to be increased.

[0026] ②According to R OUT , i The values ​​are used to reorder the off-river water supply areas, with those having the potential to reduce water volume indicators ranked first, and those without such potential ranked last. After reordering, the off-river water supply areas are numbered i′, and from 1 to N. R Water supply area outside the river channel R OUT , i′ >0, numbered N R Water supply area outside the river channel R (+1~N) OUT , i′ ≤0. N R This refers to the number of off-river water supply areas with the potential to adjust water volume indicators.

[0027] ② Based on the river water allocation plan and the predicted water demand in the river channel in the horizontal year, the formula is used. Calculate the adjustable water volume index within the river channel in the horizontal year, including: E C The annual adjustable water volume within the river channel, expressed in m³; L IN This refers to the planned amount of water used for ecological replenishment within the river channel from unconventional water sources and external water transfers during a horizontal year, expressed in m³. When E C When E > 0, it indicates that the river channel has the potential to reduce water volume in a horizontal year; when E C When E = 0, it indicates that the annual water volume index within the river channel has no potential for reduction. C When the value is less than 0, it indicates that the annual water volume index in the river channel does not have the potential to be reduced and needs to be increased.

[0028] ③ Based on the adjustable water volume indicators for different water supply areas outside the river channel and within the river channel in a horizontal year, using the formula, The adjustable water quantity index used to optimize the river water allocation scheme in the horizontal year is calculated, where: R T The adjustable water volume index for the horizontal year river water allocation scheme is expressed in m³. When R...T When R > 0, the river water allocation scheme can be optimized and adjusted; when R T When the value is ≤0, the river water diversion scheme cannot be optimized or adjusted.

[0029] S104: Using the apportionment coefficient method and opportunity cost method, establish a quantitative index for water use efficiency to calculate the water use efficiency generated by different optimization and adjustment schemes.

[0030] The established water use efficiency quantification index is used in the objective function of step S106 to guide the adjustable water allocation optimization model to find the optimal solution. The specific process is as follows: ① Establish quantitative indicators for agricultural water use efficiency. The apportionment coefficient method is used to calculate agricultural water use efficiency. This method involves rationally apportioning the increase in agricultural economic benefits among the increased agricultural water supply and other factors affecting agricultural economic benefits, such as fertilizer and seeds.

[0031] For number i′ as N R For water supply areas outside the river channel ranging from +1 to N, the apportionment coefficient method is used, employing the formula... Calculate the water use benefits resulting from increasing agricultural water supply, among which, V i′,1 The agricultural water use benefits generated by increasing agricultural water supply to the i′th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,1 Q represents the increase in agricultural water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water allocation scheme, expressed in m³. i′ Y represents the average agricultural water consumption per mu (unit of land area) in the i′-th water supply area outside the river channel during a horizontal year, expressed in m³ / mu. i′ The average economic benefit per mu (unit of land area) for agriculture in the i′th water supply area outside the river channel in a horizontal year includes the economic benefits of main and by-products of crops, expressed in yuan / mu; C i′,1 The contribution rate of agricultural water supply to agricultural economic benefits in the i′th water supply area of ​​the horizontal year is dimensionless and ranges from [0,1].

[0032] ② Establish quantitative indicators for industrial water use efficiency. The allocation coefficient method is used to calculate industrial water use efficiency. This method involves rationally allocating the incremental industrial economic benefits among the increased industrial water supply and other factors affecting industrial economic benefits, such as processes and equipment.

[0033] For number i′ as N R For water supply areas outside the river channel ranging from +1 to N, the apportionment coefficient method is used, employing the formula... Calculate the water use benefits resulting from increasing industrial water supply, among which, V i′,2 The industrial water use benefits generated by increasing industrial water supply to the i′th water supply area outside the river channel in a horizontal year are expressed in yuan; Ai′,2 M represents the increase in industrial water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water allocation scheme, expressed in m³. i′ C represents the industrial added value generated per m³ of industrial water use in the i′-th water supply area outside the river channel in a horizontal year, expressed in yuan / m³. i′,2 The contribution rate of industrial water supply to industrial economic benefits in the i′th water supply area of ​​the horizontal year is dimensionless and ranges from [0,1].

[0034] ③ Establish quantitative indicators for the benefits of domestic water use. The opportunity cost method is used to calculate the benefits of domestic water use. This method considers the maximum economic benefit that would be gained by forgoing other water uses when available water is used for domestic purposes, given a shortage of available water. Since the economic benefit per unit volume of industrial water use is generally higher than that of agricultural water use, it is assumed that an equivalent amount of industrial water use is forgone when available water is used for domestic purposes.

[0035] For number i′ as N R For the water supply area outside the river channel from +1 to N, the opportunity cost method is used, employing the formula... Calculate the water use benefits resulting from the increase in domestic water supply, among which, V i′,3 The domestic water use benefits generated by increasing the domestic water supply in the i′-th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,3 The unit is m³, which represents the increase in domestic water supply to the i′th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water distribution scheme.

[0036] ④ Establish quantitative indicators for the benefits of ecological and environmental water use. The opportunity cost method is used to calculate the benefits of ecological and environmental water use. This method aims to maximize the economic benefits of forgoing other water uses when available water is insufficient for ecological and environmental purposes. Since the economic benefits per unit volume of industrial water use are generally higher than those of agricultural water use, it is assumed that an equivalent amount of industrial water use is forgone when available water is used for ecological and environmental purposes.

[0037] For number i′ as N R For the water supply area outside the river channel from +1 to N, the opportunity cost method is used, employing the formula... Calculate the water use benefits resulting from increasing the ecological water supply, among which, V i′,4 The ecological and environmental water use benefits generated by increasing the ecological and environmental water supply to the i′th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,4 The unit is m³, which represents the increase in ecological water supply to the i′th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water distribution scheme.

[0038] ⑤ Based on the aforementioned quantitative indicators of water use efficiency for agriculture, industry, domestic use, and ecological environment, establish quantitative indicators for water use efficiency. For example, for index i′ of N... R For water supply areas outside the river channel ranging from +1 to N, using the formula, , Calculate the total water use benefits generated by different optimization and adjustment schemes, where... V is the number N R The total water use benefits generated by the annual increase in water supply in the external water supply areas from +1 to N, expressed in yuan; k is the industry code for external water supply, dimensionless, k=1,2,3,4, representing agriculture, industry, domestic, and ecological environment, respectively; F V V is a quantitative indicator of water use efficiency, dimensionless, with a value range of [0,1]. A larger value indicates higher water use efficiency. MIN V represents the lower limit of the water use benefits generated by the increased water supply outside the river channel in a horizontal year, expressed in yuan. MAX The upper limit of the water use benefits generated by the increased water supply outside the river channel in a horizontal year, expressed in yuan.

[0039] S105: Using the Gini coefficient, establish a quantitative index for water use equity to calculate the degree of fairness in water resource allocation under different optimization and adjustment schemes.

[0040] The Gini coefficient is a commonly used indicator to measure the degree of inequality in income or wealth distribution among residents of a country or region, and its value ranges from 0 to 1. A smaller Gini coefficient indicates a more even income distribution; a larger coefficient indicates a greater wealth gap. This invention applies the Gini coefficient to the field of water resources to measure the fairness of water resource allocation across different regions and industries.

[0041] The water equity quantification index established in S105 is used in the objective function of S106 to guide the adjustable water allocation optimization model in finding the optimal solution. The specific process is as follows: ① Quantitative indicators for water user satisfaction, for number i′ as N R For water supply areas outside the river channel ranging from +1 to N, using the formula, , , Calculate water user satisfaction for various industries in different water supply areas outside the river channel. P i′,k W represents the water shortage rate of the k-th industry in the i′-th water supply area outside the river channel in a horizontal year. It is dimensionless and ranges from [0,1]. OUT-O,i′,kThe water allocation quota, in m³, is the water quantity allocated to the k-th industry in the i′-th water supply area outside the river channel under the current river water allocation scheme. If the current river water allocation scheme does not allocate water to any industry, it can be replaced by the water quantity actually allocated to the k-th industry in the i′-th water supply area under the multi-year average inflow scenario. This quota should satisfy the following conditions: L OUT,i′,k D represents the available water supply from local groundwater, unconventional water sources, and diverted water to the k-th industry in the i′-th water supply area outside the river channel in a horizontal year, in m³. OUT-O,i′,k S represents the water demand of the k-th industry in the i′-th water supply area outside the river channel in a horizontal year, in m³. i′,k S represents the water satisfaction of the k-th industry in the i′-th water supply area outside the river channel in a horizontal year. It is dimensionless and its value ranges from [0,1]. 1,i′,k and S 2,i′,k All values ​​represent the satisfaction levels corresponding to the inflection points on the water use satisfaction curves of the i′-th water supply area and the k-th industry outside the river channel in a horizontal year. These values ​​are dimensionless, and their locations are illustrated in the diagram below. Figure 1 It should satisfy 0≤S 1,i′,k <S 2,i′,k ≤1, the number and values ​​of inflection points should be set according to the actual situation; P 1,i′,k and P 2,i′,k S on the water satisfaction curve 1,i′,k and S 2,i′,k The corresponding water shortage rate, and its location diagram are shown below. Figure 1 It should satisfy 0≤P 2,i′,k <P 1,i′,k ≤1.

[0042] This embodiment assumes that the water satisfaction curve is a piecewise broken line with two inflection points. Figure 2 .

[0043] In practical applications, the shape of the water satisfaction curve should be reasonably set according to the actual situation, and S should be adjusted accordingly. i′,k The calculation formula.

[0044] ② Quantitative indicators for water use fairness among water supply areas outside the river channel, for example, for N with number i′ R For water supply areas outside the river channel ranging from +1 to N, the Gini coefficient is used, and the formula is applied. , Calculate the fairness of water use among the various water supply areas outside the river channel, whereby... Z i′ Z represents the average water satisfaction of all industries in the i′-th water supply area outside the river channel during a horizontal year. It is dimensionless and ranges from [0,1]. i′ ′ for Z i′ The sequence generated by arranging the data in ascending order is dimensionless; GZ The Gini coefficient represents the fairness of water use among different water supply areas outside the river channel. It is dimensionless and ranges from [0,1]. A larger value indicates greater unfairness in water use among the areas. h is an intermediate variable, and N is a variable that represents fairness among water supply areas. R +1≤h≤N-1, dimensionless.

[0045] ③ Quantitative indicators of water use fairness among various industries outside the river channel, for example, for the number i′ as N R For water supply areas outside the river channel ranging from +1 to N, the Gini coefficient is used, and the formula is applied. , Calculate the fairness of water use among various industries outside the river channel, among which, O k Let $\frac{ ... k ′ is to O k Rearrange the sequences in ascending order to generate a new, dimensionless sequence; G O is the Gini coefficient representing the fairness of water use among various industries outside the river channel. It is dimensionless and ranges from [0,1]. A larger value indicates greater unfairness in water use among industries. h is an intermediate variable, 1≤h≤3, and is dimensionless.

[0046] ④ Based on the aforementioned quantitative indicators of water use equity among different water supply areas outside the river channel and among different industries outside the river channel, establish a quantitative indicator of water use equity, using the formula... Calculate the fairness of different optimization and adjustment schemes in water resource allocation, among which, F E It is a quantitative indicator for water use fairness, used to characterize the degree of water use fairness between water supply areas outside the river channel and between industries. It is dimensionless and has a value range of [0,1]. The larger the value, the fairer the water use.

[0047] S106: Establish an adjustable water allocation optimization model that balances fairness and efficiency, and derive the allocation scheme for adjustable water indicators by solving this model. The specific process is as follows: ①Establish the objective function of the adjustable water allocation model, and use the formula, This provides evaluation criteria and optimization directions for the model, including: T AR The objective of the adjustable water allocation model is dimensionless and ranges from [0,1]. A larger value indicates a better adjustable water allocation scheme. α is the weight of the water use equity quantitative index, dimensionless and ranges from [0,1]. The value of α is set according to the actual situation and the decision-maker's preference. A larger value indicates that water use equity is given more importance in allocation, and a smaller value indicates that efficiency is given more importance in allocation.

[0048] ② Establish constraints for the adjustable water allocation optimization model, using formulas, , Define the feasible region of the solution, where... U i′,k The water supply capacity of the project to the k-th industry in the i′-th water supply area outside the river channel in a horizontal year is expressed in m³.

[0049] ③ Determine the solution algorithm for the adjustable water allocation model. Based on the computational complexity, select a suitable algorithm from optimization algorithms such as genetic algorithm and particle swarm optimization to solve the adjustable water allocation model and obtain the optimal solution, i.e., the objective function T. AR The increase in water supply A in each water supply area and industry outside the river channel when the value is maximized. BEST,i′,k .

[0050] S107: Calculate the water volume indicators for different water supply areas within and outside the river channel after optimization and adjustment for the horizontal year, and obtain the optimized river water allocation scheme. The specific process is as follows: ① Using the formula, The optimized and adjusted water volume index of the river channel for the aforementioned horizontal year is obtained, wherein, W IN-C The water volume index in the river channel after the horizontal year optimization adjustment is expressed in m³.

[0051] ② Using the formula, The water volume indicators for different water supply areas outside the river channel after the horizontal year optimization and adjustment were obtained, among which, W OUT-C,i′ The water volume index for the i′th water supply area outside the river channel after the horizontal year optimization adjustment is given, in m³.

[0052] The optimized and adjusted river water allocation scheme can be expressed as follows: .

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for optimizing and adjusting a river water diversion scheme, characterized in that: Includes the following steps: Step S101: First, clarify the water allocation indicators for each water supply area inside and outside the river channel of the river for which the river water allocation plan has been implemented; Step S102: Determine the base year and horizontal year for adjusting the river water distribution scheme, and predict the water demand of each water supply area outside the river channel and the water demand inside the river channel in the horizontal year; Step S103: Based on the river water allocation scheme and the predicted water demand of each water supply area outside the river channel and the water demand inside the river channel in the horizontal year, calculate the adjustable water volume index of each water supply area outside the river channel and inside the river channel in the horizontal year, and calculate the adjustable water volume index used for optimization of the river water allocation scheme in the horizontal year. Step S104: Using the existing allocation coefficient method and opportunity cost method, establish a quantitative index for water use efficiency to calculate the water use efficiency generated by the optimization and adjustment scheme; Step S105: Using the Gini coefficient, establish a quantitative index for water use equity to calculate the degree of fairness of the optimized adjustment scheme in water resource allocation; Step S106: Establish an adjustable water volume optimization allocation model that takes into account both fairness and efficiency, solve the adjustable water volume optimization allocation model, and obtain the allocation scheme of the adjustable water volume reduction index. Step S107: Calculate the optimized water volume indicators for each water supply area inside and outside the river channel after the horizontal year optimization adjustment, and obtain the optimized river water allocation scheme.

2. The method for optimizing and adjusting river water distribution schemes according to claim 1, characterized in that: In step S101, the calculation formula for the water allocation index is as follows: ;in: W represents the river's average annual natural runoff, measured in m³. IN-O The water allocation quota within the river channel under the aforementioned river water allocation scheme is expressed in m³; i represents the water supply area number outside the river channel involved in the river water allocation scheme, i = 1, 2, ..., N; W OUT-O,i The water allocation quota for the i-th water supply area outside the river channel is given by the river water allocation scheme, in m³.

3. The method for optimizing and adjusting river water distribution schemes according to claim 1 or 2, characterized in that: In step S102, the reference year should be selected as the year that is closest to the current level of economic and social development and normal hydrological conditions, and meets the relevant data requirements; the horizontal year should be selected as a future year with a time difference greater than 10 years from the reference year; the water demand of each water supply area outside the river channel in the horizontal year is predicted using the quota method, including water demand for domestic, industrial, agricultural and ecological environments outside the river channel; the prediction of water demand within the river channel is as follows: the control section of the river mouth hydrological station is selected, and the demand of aquatic organisms, sediment transport, plastic channel and navigation is comprehensively considered according to the river characteristics, and the calculation is performed using hydrological methods, hydraulic methods, habitat simulation methods or overall analysis methods.

4. The method for optimizing and adjusting river water distribution schemes according to claim 1 or 2, characterized in that: In step S103, the formula is used. The adjustable water reduction index for each water supply area outside the river channel is calculated for each horizontal year; where: R OUT , i L represents the adjustable water reduction index for the i-th water supply area outside the river channel in a horizontal year, in m³. OUT , i D represents the available water volume of local groundwater, unconventional water sources, and diverted water in the i-th water supply area outside the river channel in a horizontal year, in m³. OUT,i R represents the water demand of the i-th water supply area outside the river channel in a horizontal year, in m³; when R OUT , i When the value is greater than 0, it indicates that the i-th water supply area outside the river channel in the horizontal year has the potential to reduce the water volume index. According to R OUT , i The values ​​are used to reorder the water supply areas outside the river channel, with those having the potential to reduce water volume indices ranked first, and those not having such potential ranked last. After reordering, the water supply areas outside the river channel are numbered i′, and their numbers range from 1 to N. R Water supply area outside the river channel R OUT , i′ >0, numbered N R Water supply area outside the river channel R (+1~N) OUT , i′ ≤0; N R The number of off-channel water supply areas with the potential for adjustable water volume reduction; Using the formula, Calculate the adjustable water reduction index within the river channel in the horizontal year, wherein: E C The annual adjustable water volume within the river channel, expressed in m³; L IN D represents the planned amount of water used for ecological replenishment within the river channel from unconventional water sources and external water transfers in a horizontal year, expressed in m³. IN The annual water demand in the river channel is expressed in m³; when E C When the value is greater than 0, it indicates that the river channel has the potential to reduce water volume in a horizontal year. Using formula The adjustable water quantity index used to optimize the river water allocation scheme for the calculated horizontal year is as follows: R T The adjustable water volume index for the horizontal annual river water allocation scheme is expressed in m³; when R T When R > 0, the river water diversion scheme can be optimized and adjusted; when R T When the value is ≤0, the river water diversion scheme cannot be optimized or adjusted.

5. The method for optimizing and adjusting river water distribution schemes according to claim 1 or 2, characterized in that: In step S104, establishing quantitative indicators for water use efficiency includes: ① Establish quantitative indicators for agricultural water use efficiency: For example, for the number i′ of N R For water supply areas outside the river channel ranging from +1 to N, the apportionment coefficient method is used, employing the formula... Calculate the water use benefits resulting from increasing agricultural water supply, including: V i′,1 The agricultural water use benefits generated by increasing agricultural water supply to the i′th water supply area outside the river channel in the aforementioned horizontal year are expressed in yuan; A i′,1 Q represents the increase in agricultural water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water allocation scheme, expressed in m³. i′ Y represents the average agricultural water consumption per mu (unit of land area) in the i′-th water supply area outside the river channel during a horizontal year, expressed in m³ / mu. i′ The average economic benefit per mu (unit of land area) for agriculture in the i′th water supply area outside the river channel in a horizontal year includes the economic benefits of main and by-products of crops, expressed in yuan / mu; C i′,1 The contribution rate of agricultural water supply to agricultural economic benefits in the i′th water supply area of ​​the horizontal year is dimensionless and ranges from [0,1]. ② Establish quantitative indicators for industrial water use efficiency: For example, for N with number i′ R For water supply areas outside the river channel ranging from +1 to N, the apportionment coefficient method is used, employing the formula... Calculate the water use benefits resulting from increasing industrial water supply, including: V i′,2 The industrial water use benefits generated by increasing industrial water supply to the i′th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,2 M represents the increase in industrial water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water allocation scheme, expressed in m³. i′ C represents the industrial added value generated per m³ of industrial water use in the i′-th water supply area outside the river channel in a horizontal year, expressed in yuan / m³. i′,2 The contribution rate of industrial water supply to industrial economic benefits in the i′th water supply area of ​​the horizontal year is dimensionless and ranges from [0,1]. ③ Establish quantitative indicators for domestic water use efficiency: For example, for the number i′ of N R For the water supply area outside the river channel from +1 to N, using the opportunity cost method, assuming that an equal amount of industrial water use is sacrificed when the available water is used for domestic water use, and using the formula... Calculate the water use benefits resulting from the increase in domestic water supply, including: V i′,3 The domestic water use benefits generated by increasing the domestic water supply in the i′-th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,3 This represents the increase in domestic water supply to the i′-th water supply area outside the river channel in a horizontal year due to the optimization and adjustment of the river water distribution scheme, expressed in m³. ④ Establish quantitative indicators for ecological and environmental water use benefits: For index i′ of N R For the water supply area outside the river channel from +1 to N, using the opportunity cost method, it is assumed that when the available water is used for ecological and environmental water use, an equivalent amount of industrial water use is forgone. Using the formula... Calculate the water use benefits resulting from the increased ecological water supply, including: V i′,4 The ecological and environmental water use benefits generated by increasing the ecological and environmental water supply to the i′th water supply area outside the river channel in a horizontal year are expressed in yuan; A i′,4 The ecological water supply to the i′ water supply area outside the river channel is increased by m³ in a horizontal year due to the optimization and adjustment of the river water distribution scheme. ⑤ Based on the quantitative indicators of water use efficiency in agriculture, industry, domestic use, and the ecological environment, establish the total water use efficiency; for example, for N... R For water supply areas outside the river channel ranging from +1 to N, using the formula, , , , Calculate the total water use benefits generated by different optimization and adjustment schemes, where: V is the number N R The total water use benefits generated by the annual increase in water supply in the external water supply areas from +1 to N, expressed in yuan; k is the industry code for external water supply, dimensionless, k=1,2,3,4, representing agriculture, industry, domestic, and ecological environment, respectively; F V V is a quantitative indicator of water use efficiency, dimensionless, with a value range of [0,1]. A larger value indicates higher water use efficiency. MIN V represents the lower limit of the water use benefits generated by the increased water supply outside the river channel in a horizontal year, expressed in yuan. MAX The upper limit of the water use benefits generated by the increased water supply outside the river channel in a horizontal year, expressed in yuan.

6. The method for optimizing and adjusting river water distribution schemes according to claim 1 or 2, characterized in that: In step S105, the water fairness quantification indicators include: ① Establish quantitative indicators for water user satisfaction: For number i′ as N R For water supply areas outside the river channel ranging from +1 to N, using the formula, , Calculate the water user satisfaction of various industries in each water supply area outside the river channel, including: P i′,k W represents the water shortage rate of the k-th industry in the i′-th water supply area outside the river channel in the horizontal year. It is dimensionless and ranges from [0,1]. OUT-O,i′,k The water allocation quota, in m³, is the water quantity allocated to the k-th industry in the i′-th water supply area outside the river channel under the current river water allocation scheme. If the current river water allocation scheme does not allocate water to the k-th industry, it can be replaced by the water quantity actually allocated to the k-th industry in the i′-th water supply area under the multi-year average inflow scenario, which should satisfy the following conditions. L OUT,i′,k D represents the available water supply from local groundwater, unconventional water sources, and diverted water to the k-th industry in the i′-th water supply area outside the river channel in a horizontal year, in m³. OUT-O,i′,k S represents the water demand of the k-th industry in the i′-th water supply area outside the river channel in a horizontal year, in m³. i′,k S represents the water satisfaction of the k-th industry in the i′-th water supply area outside the river channel in a horizontal year. It is dimensionless and its value ranges from [0,1]. 1,i′,k and S 2,i′,k All values ​​represent the satisfaction levels corresponding to the inflection points on the water use satisfaction curves of the i′-th water supply area and the k-th industry outside the river channel in a horizontal year. These values ​​are dimensionless, and their locations are illustrated in Figure 1. The condition 0 ≤ S should be satisfied. 1,i′,k <S 2,i′,k ≤1, the number and values ​​of inflection points should be set according to the actual situation; P 1,i′,k and P 2,i′,k S on the water satisfaction curve 1,i′,k and S 2,i′,k The corresponding water shortage rate, and its location diagram are shown in Figure 1, should satisfy 0 ≤ P 2,i′,k <P 1,i′,k ≤1; ② Establish quantitative indicators for water use fairness among different water supply areas outside the river channel: For example, for water supply areas numbered i′ as N R For water supply areas outside the river channel ranging from +1 to N, the Gini coefficient is used, and the formula is applied. , Calculate the fairness of water use among the various water supply areas outside the river channel, where: Z i′ Z represents the average water satisfaction of all industries in the i′-th water supply area outside the river channel during a horizontal year. It is dimensionless and ranges from [0,1]. i′ ′ for Z i′ The sequence generated by arranging the data in ascending order is dimensionless; G Z The Gini coefficient represents the fairness of water use among different water supply areas outside the river channel. It is dimensionless and ranges from [0,1]. A larger value indicates greater unfairness in water use among the areas. h is an intermediate variable, and N is a variable that represents fairness among water supply areas. R +1≤h≤N-1, dimensionless; ③ Establish quantitative indicators for water use fairness among various industries outside the river channel: For example, for N... R For water supply areas outside the river channel ranging from +1 to N, the Gini coefficient is used, and the formula is applied. , Calculate the fairness of water use among various industries outside the river channel, among which, O k Let $\frac{ ... k ′ is to O k Rearrange the sequences in ascending order to generate a new, dimensionless sequence; G O is the Gini coefficient representing the fairness of water use among various industries outside the river channel. It is dimensionless and ranges from [0,1]. A larger value indicates greater unfairness in water use among industries. h is an intermediate variable, 1≤h≤3, and is dimensionless. ④ Based on the aforementioned quantitative indicators of water use equity among different water supply areas outside the river channel and among different industries outside the river channel, establish a quantitative indicator of water use equity, using the formula... Calculate the fairness of different optimization and adjustment schemes in water resource allocation, where: F E It is a quantitative indicator for water use fairness, used to characterize the degree of water use fairness between water supply areas outside the river channel and between industries. It is dimensionless and has a value range of [0,1]. The larger the value, the fairer the water use.

7. The method for optimizing and adjusting river water distribution schemes according to claim 1 or 2, characterized in that: Step S106 also includes: ① Establish the objective function of the adjustable water allocation model, using the formula, This provides evaluation criteria and optimization directions for the optimal allocation of adjustable water volume, including: T AR The objective of the adjustable water allocation model is dimensionless and ranges from [0,1]. A larger value indicates a better adjustable water allocation scheme. α is the weight of the water use equity quantitative index, which is dimensionless and ranges from [0,1]. The value of α is set according to the actual situation and the decision-maker's preference. A larger value indicates that more importance is attached to water use equity during allocation. ②Establish the constraints of the adjustable water allocation model, using the formula, , Define the feasible region of the solution, where: U i′,k The water supply capacity of the project to the k-th industry in the i′-th water supply area outside the river channel in a horizontal year is expressed in m³. ③ Determine the solution algorithm for the adjustable water allocation model: Based on the computational complexity, use a genetic algorithm or particle swarm optimization algorithm to solve the adjustable water allocation model and obtain the optimal solution, i.e., the objective function T. AR The increase in water supply A in each water supply area and industry outside the river channel when the value is maximized. BEST,i′,k .

8. The method for optimizing and adjusting river water distribution schemes according to claim 1 or 2, characterized in that: In step S107, the optimized water quantity index includes: ① Using the formula, The optimized and adjusted water volume index in the river channel for the aforementioned horizontal year is obtained, wherein: W IN-C The water volume index in the river channel after the horizontal year optimization adjustment is expressed in m³. ② Using the formula, The water volume indicators for each water supply area outside the river channel after the horizontal year optimization and adjustment are obtained, where: W OUT-C,i′ The water volume index for the i′th water supply area outside the river channel after the horizontal year optimization adjustment is given, in m³.

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