Underground water ecological compensation standard calculation method based on reasonable water distribution

Abstract

The invention relates to the technical field of water resource management, and discloses a groundwater ecological compensation standard calculation method based on reasonable water distribution, which comprises the following steps: establishing a water optimal distribution model, and obtaining the optimal distribution water; establishing a pollutant permissible discharge amount model of the water user, and obtaining pollutant permissible discharge amount allocated to the water user; calculating the historical annual water consumption and annual income of the water users, calculating the economic income relative weights of the water users, obtaining the constraint conditions of the annual water consumption of each water user in the current year based on the optimal water distribution model, and calculating the maximum water consumption income of all the water users in the current year; calculating the current-year total net income of all the water users according to the allowable pollutant discharge amount allocated to the water users; if the current-year total net income of all the water users is smaller than the current-year maximum water utilization income of all the water users, groundwater ecological compensation is carried out on the water utilization department; according to the method, efficient utilization of water resources is promoted, and optimal configuration and ecological compensation of underground water resources are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of water resource management, and in particular to a method for calculating groundwater ecological compensation standards based on reasonable water distribution. Background Art

[0002] As the water shortage problem intensifies, the rational allocation of groundwater resources and ecological protection become particularly important. Traditional groundwater management methods often ignore the importance of ecological compensation, leading to overexploitation of groundwater resources and deterioration of the ecological environment. Therefore, a scientific and reasonable method is urgently needed to calculate the groundwater ecological compensation standard to promote the sustainable use of groundwater resources and improve the ecological environment. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for calculating groundwater ecological compensation standards based on reasonable water allocation. By comprehensively considering the historical water consumption of various departments, production influencing factors, economic benefits, and the total amount of available groundwater resources and pollution absorption capacity in the study area, the optimal allocation and ecological compensation of groundwater resources are achieved, thereby solving the ecological environment deterioration caused by over-exploitation of groundwater resources in traditional groundwater management methods.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A method for calculating groundwater ecological compensation standards based on reasonable water allocation includes the following steps:

[0006] S1. Obtain the historical water consumption and historical output of each water-using department in the study area and conduct nonlinear regression analysis to calculate the output influencing factors of each water-using department, and establish an optimal water allocation model based on the total available water resources of groundwater in the study area to obtain the optimal allocated water volume;

[0007] S2. Based on the water demand of each water user, the total water demand of the study area and the pollution absorption capacity of the water body, a pollutant emission allowance model for water users is established to obtain the pollutant emission allowance allocated to water users;

[0008] S3. Count the historical annual water consumption and historical annual income of each water user, calculate the relative weight of the economic income of each water user, and at the same time, based on the optimal water allocation model, obtain the constraints of the annual water consumption of each water user in that year, and calculate the maximum water income of all water users in that year based on the relative weight of the economic income of each water user and the annual water consumption of each water user in that year;

[0009] S4. Calculate the total net income of all water users for the year based on the total net income of each water user for the year and the permitted pollutant emissions allocated to the water user;

[0010] S5. If the total net income of all water users in the year is less than the maximum water use income of all water users in the year, groundwater ecological compensation shall be made to each water user department;

[0011] Among them, the standard for groundwater ecological compensation for each water-using department is: subtract the total net income of all water users in the year from the maximum water use income of all water users in the year and divide it by all water users to obtain the compensation income of each water user in the year, and multiply it by the water users of each water-using department in the year to obtain the compensation income of each water-using department in the year.

[0012] Furthermore, the yield impact factor is the contribution of the water consumption of the water-using department to its output, and the larger the yield impact factor, the higher the water utilization efficiency of the water-using department, and the smaller the yield impact factor, the lower the water utilization efficiency of the water-using department.

[0013] Furthermore, step S1 specifically includes:

[0014] S11. Obtain the historical water consumption and historical output of each water-using department in the study area, and after data cleaning and preprocessing, use nonlinear regression analysis to calculate the output influencing factors of each water-using department, namely:

[0015] ln(y i )=ln(α)+k i ·ln(x i )+ε i

[0016] Where ln represents the logarithmic function, i represents the water-using sector, and y i represents the historical output of the i-th water-using sector, k i represents the production influencing factor of the i-th water-using sector, x i represents the historical water consumption of the ith water-using department, α represents the fitting coefficient, and ε i represents the random error term;

[0017] S12. Based on the total amount of available groundwater resources in the study area and combined with the production influencing factors of each water-using department, an optimal water allocation model is established to obtain the optimal allocated water volume, namely:

[0018]

[0019] Among them, Q opt，i represents the optimal water allocation of the i-th water-using department, f represents the optimal water allocation model, Y i represents the historical output of the i-th water-using department, R represents the total available groundwater resources in the study area, Max represents the maximum value, n represents the number of water-using departments, and al i represents the amount of water allocated to the ith water-using department, d irepresents the water demand of the i-th water-using department, st represents the requirement to satisfy it, Indicates any character.

[0020] Furthermore, the pollutant emission model of the water user in step S2 is:

[0021] T t，j =(d t，j / D t )×E t

[0022] Among them, j represents the water user, T t，j represents the permitted pollutant emission amount allocated to water user j in time period t, d t，j represents the water demand of water user j in time period t, D t represents the total water demand in the study area during period t, E t It represents the pollution assimilating capacity of the water body within the time period t.

[0023] Furthermore, step S3 specifically includes:

[0024] S31. Count the historical annual water consumption and historical annual income of each water user, and use the Z-score standardization method to standardize and average them to obtain the standardized average historical annual water consumption and average historical annual income of each water user, that is:

[0025]

[0026] Among them, Z1 j，i1 represents the standardized historical annual water consumption of water user j in year i1, Z2 j，i1 represents the standardized historical annual income of water user j in year i1, X1 j，i1 represents the historical annual water consumption of water user j in year i1, X2 j，i1 represents the historical annual income of water user j in the i1th year, μ1 and μ2 represent the mean of the historical annual water consumption and historical annual income of water user j, σ1 and σ2 represent the standard deviation of the historical annual water consumption and historical annual income of water user j, respectively, and Z1 j 、Z2 j They represent the standardized average historical annual water consumption and average historical annual income of water user j, and m represents the total number of water users;

[0027] S32, perform function fitting on the historical annual water consumption and historical annual income of each water user to set the weight judgment standard, and obtain the weight ω1 of the standardized average historical annual water consumption and average historical annual income of each water user j ω2 j , the specific process is:

[0028] Perform function fitting on the historical annual water consumption and historical annual income of each water user to obtain the function fitting relationship;

[0029] If the function fitting relationship is a linear relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are set to be equal, that is, ω1 j =ω2 j And satisfy the relationship ω1 j +ω2 j =1;

[0030] If the function fitting relationship is a nonlinear relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are set as ω1 j ω2 j , and satisfy the relationship ω1 j +ω2 j =1;

[0031] S33, weight ω1 based on the standardized average historical annual water consumption and average historical annual income of each water user j ω2 j , calculate the comprehensive economic benefit index of each water user, namely:

[0032] CES j =ω1 j ×Z1 j +ω2 j ×Z2 j

[0033] Among them, CES j It represents the comprehensive economic benefit index of each water user j;

[0034] S34. Standardize the comprehensive economic benefit indicators of each water user to obtain the relative weight of the economic benefit of each water user, that is:

[0035]

[0036] Among them, w j represents the relative weight of the economic benefits of water user j;

[0037] S35. Based on the optimal water allocation model, the constraints of the annual water consumption of each water user are obtained, and the maximum water use income of all water users in the year is calculated according to the relative weight of the economic benefits of each water user and the annual water consumption of each water user, that is:

[0038]

[0039] Among them, ζ represents the maximum water use income of all water users in the year, Q j represents the annual water consumption of water user j in that year, a ijcrepresents the allocated water volume corresponding to the water use activity c of water user j in the ith water use department, where c represents the water use activity and C represents the total amount of water use activity.

[0040] Furthermore, the calculation formula for the total net income of all water users in the year in step S4 is:

[0041]

[0042] Among them, T Benefit represents the total net income of all water users in the year, B j represents the total net benefit of water user j, A cj represents the scale of water user j in water use activity c, B cj represents the net benefit obtained by water user j in water use activity c, and β represents the cost of pollutant emissions.

[0043] The present invention has the following beneficial effects:

[0044] The present invention proposes a method for calculating the groundwater ecological compensation standard based on the reasonable allocation of water. By comprehensively considering the historical water consumption of various departments, production influencing factors, economic benefits, and the total amount of groundwater available water resources and pollution absorption capacity in the study area, the method achieves the optimal allocation and ecological compensation of groundwater resources, promotes the efficient utilization of water resources, and at the same time provides economic compensation for the environmental damage that may be caused in the process of water resource use, which helps to internalize environmental externalities into the costs of water users, thereby prompting water users to adopt more environmentally friendly water use methods and solve the ecological environment deterioration caused by over-exploitation of groundwater resources in traditional groundwater management methods; secondly, through the compensation mechanism, part of the benefits are distributed to other water users or used for ecological restoration, which helps to achieve fair distribution of water resource benefits, thereby ensuring the health and sustainable utilization of groundwater ecosystems. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The present invention is a flowchart of a method for calculating groundwater ecological compensation standards based on reasonable water allocation. DETAILED DESCRIPTION

[0046] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0047] like Figure 1As shown, a method for calculating groundwater ecological compensation standards based on reasonable water allocation includes the following steps S1-S5:

[0048] S1. Obtain the historical water consumption and historical output of each water-using department in the study area and conduct nonlinear regression analysis to calculate the output influencing factors of each water-using department. Based on the total amount of available groundwater resources in the study area, establish an optimal water allocation model to obtain the optimal allocated water volume.

[0049] In this embodiment, the purpose of establishing the optimal water allocation model is: first, by optimizing the allocation, ensure that water resources can flow to the department with the highest utilization efficiency, thereby improving the overall water resource utilization efficiency; second, in the process of optimizing the allocation, ensure that the basic needs of each water-using department are met to avoid affecting normal production and life activities due to water shortage; at the same time, through reasonable water resource allocation, support the development of various departments such as agriculture, industry, and life, and provide strong guarantees for regional economic growth and social stability; finally, under the limited total amount of water resources, through scientific allocation and management, ensure the sustainable use of water resources to avoid environmental problems caused by over-exploitation and waste.

[0050] Specifically, the yield impact factor is the contribution of the water consumption of the water-using department to its output. The larger the yield impact factor, the higher the water utilization efficiency of the water-using department, and the smaller the yield impact factor, the lower the water utilization efficiency of the water-using department.

[0051] Specifically, step S1 includes S11-S12:

[0052] S11. Obtain the historical water consumption and historical output of each water-using department in the study area, and after data cleaning and preprocessing, use nonlinear regression analysis to calculate the output influencing factors of each water-using department, namely:

[0053] ln(y i )=ln(α)+k i ·ln(x i )+ε i

[0054] Where ln represents the logarithmic function, i represents the water-using sector, and y i represents the historical output of the i-th water-using sector, k i represents the production influencing factor of the i-th water-using sector, x i represents the historical water consumption of the ith water-using department, α represents the fitting coefficient, and ε j represents the random error term.

[0055] In this embodiment, the purpose of data cleaning and preprocessing is to ensure that the data of historical water consumption and historical production are accurate; data cleaning and preprocessing include outlier processing and filling missing values. In addition, the purpose of this step is to establish a nonlinear relationship between historical water consumption and historical production, so as to quantify water use efficiency, that is, the production influencing factor, so as to calculate the optimal water allocation in the subsequent steps.

[0056] S12. Based on the total amount of available groundwater resources in the study area and combined with the production influencing factors of each water-using department, an optimal water allocation model is established to obtain the optimal allocated water volume, namely:

[0057]

[0058] Among them, Q opt，i represents the optimal water allocation of the i-th water-using department, f represents the optimal water allocation model, Y i represents the historical output of the i-th water-using department, R represents the total available groundwater resources in the study area, Max represents the maximum value, n represents the number of water-using departments, and al i represents the amount of water allocated to the ith water-using department, d i represents the water demand of the i-th water-using department, st represents the requirement to satisfy it, Indicates any character.

[0059] In this embodiment, the optimal water allocation model optimizes the water allocation of each water-using department under the given total available groundwater resource limit to maximize water use efficiency, where represents the product of water use benefits of all water-using departments, It can be understood as the relative water use benefit of the i-th water user department under a given allocated water volume. i Approaching or reaching water demand i When the water allocation is far lower than the water demand, the water use efficiency of the department is close to 1, and when the water allocation is far lower than the water demand, the water use efficiency will decrease significantly, and the degree of decrease is determined by the yield impact factor. Therefore, the larger the yield impact factor is, the higher the water utilization rate of the department is. Therefore, when the water supply is insufficient, the faster the water use efficiency decreases. Therefore, based on this balance setting, the optimal water allocation is calculated to solve the problem of over-exploitation of groundwater resources.

[0060] S2. Based on the water demand of each water user, the total water demand of the study area and the pollution absorption capacity of the water body, a pollutant emission permit model for water users is established to obtain the pollutant emission permit allocated to water users.

[0061] In this embodiment, the permitted pollutant emission of water users is considered so that the economic benefits generated by water users in pollutant emission can be calculated in the subsequent steps. The purpose is: (1) Taking the pollution absorption capacity of the water body in the study area as the total amount control target, by allocating specific permitted pollutant emission amounts to each water user, ensure that the total amount of pollutant emissions in the entire area does not exceed the environmental carrying capacity, thereby preventing environmental pollution. (2) By reasonably determining the permitted pollutant emission amount of each water user, water users can be guided to take more environmentally friendly measures in production and life, reduce pollutant emissions, thereby protecting water resources and the ecological environment and achieving sustainable utilization. It also has the following advantages: the indirect economic benefits brought about by the improvement of environmental quality by reducing pollutant emissions, such as reducing the cost of pollution control and improving ecosystem service functions. Although these benefits are difficult to quantify directly, they should be considered in economic decision-making.

[0062] Specifically, the pollutant emission model of the water user in step S2 is:

[0063] T t，j =(d t，j / D t )×E t

[0064] Among them, j represents the water user, T t，j represents the permitted pollutant emission amount allocated to water user j in time period t, d t，j represents the water demand of water user j in time period t, D t represents the total water demand in the study area during period t, E t It represents the pollution assimilating capacity of the water body within the time period t.

[0065] S3. Count the historical annual water consumption and historical annual income of each water user, calculate the relative weight of the economic income of each water user, and at the same time, based on the optimal water allocation model, obtain the constraints of each water user's annual water consumption in the current year, and calculate the maximum water income of all water users in the current year based on the relative weight of the economic income of each water user and the annual water consumption of each water user.

[0066] In this embodiment, each water-using department supplies water to the corresponding water users. Therefore, after the optimal water allocation model is established, the constraints of the annual water consumption of each water user can be obtained, that is:

[0067] Specifically, step S3 specifically includes S31-S35:

[0068] S31. Count the historical annual water consumption and historical annual income of each water user, and use the Z-score standardization method to standardize and average them to obtain the standardized average historical annual water consumption and average historical annual income of each water user, that is:

[0069]

[0070] Among them, Z1 j，i1 represents the standardized historical annual water consumption of water user j in year i1, Z2 j，i1 represents the standardized historical annual income of water user j in year i1, X1 j，i1 represents the historical annual water consumption of water user j in year i1, X2 j，i1 represents the historical annual income of water user j in the i1th year, μ1 and μ2 represent the mean of the historical annual water consumption and historical annual income of water user j, σ1 and σ2 represent the standard deviation of the historical annual water consumption and historical annual income of water user j, respectively, and Z1 j 、Z2 j They represent the standardized average historical annual water consumption and average historical annual income of water user j respectively, and m represents the total number of water users.

[0071] In this embodiment, the purpose of using the Z-score standardization method for standardization is: (1) enhancing comparability; through Z-score standardization, data of different dimensions or magnitudes are converted to the same scale, so that the historical annual water consumption and historical annual income of different water users can be directly compared, which enhances the comparability of data; (2) eliminating the influence of outliers; the standardization process helps to reduce the influence of extreme values ​​(i.e., outliers) on the overall distribution of data, making the analysis results more robust; (3) providing a basis for subsequent analysis; the standardization process helps to reduce the influence of extreme values ​​(i.e., outliers) on the overall distribution of data, making the analysis results more robust; (4) revealing relative position; the Z-score value represents the relative position of the observed value in the data distribution, that is, its distance from the mean value (in units of standard deviation), which helps us understand the performance of each water user in the historical data. In addition, the purpose of calculating the standardized average historical annual water consumption and average historical annual income of each water user is: the standardized average historical annual water consumption reflects the relatively average water consumption level of the water user in the past period of time, while the standardized average historical annual income reflects its relatively average economic benefit level. Through these two indicators, we can preliminarily evaluate the performance of water users in terms of water resource utilization and economic benefits, and provide a basis for subsequent water-saving measures and economic benefit improvement strategies.

[0072] S32, perform function fitting on the historical annual water consumption and historical annual income of each water user to set the weight judgment standard, and obtain the weight ω1 of the standardized average historical annual water consumption and average historical annual income of each water userj ω2 j , the specific process is:

[0073] Perform function fitting on the historical annual water consumption and historical annual income of each water user to obtain the function fitting relationship.

[0074] In this embodiment, the historical annual water consumption and historical annual income of each water user are input into statistical software, such as SPSS, SAS, and R language, or a programming language with data analysis function (such as Pandas, NumPy, SciPy or Matplotlib library in Python, and a special machine learning library such as scikit-leam), and statistical software is used to perform data analysis to obtain the functional relationship between the historical annual water consumption and the historical annual income, so as to use the functional relationship to set the weight judgment standard.

[0075] If the function fitting relationship is a linear relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are set to be equal, that is, ω1 j =ω2 j And satisfy the relationship ω1 j +ω2 j =1.

[0076] If the function fitting relationship is a nonlinear relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are set as ω1 j ω2 j , and satisfy the relationship ω1 j +ω2 j =1.

[0077] In this embodiment, when the function fitting relationship is a nonlinear relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are ω1 j ω2 j , usually ω1 j =0.4,ω2 j=0.6; and the weight is set based on the analysis of historical data of water users of different industries and sizes, combined with the actual relationship between water consumption and benefits and how these relationships affect the allocation of water resources and economic benefits. Specifically: (1) Industry characteristics: Water users in different industries may have different relationships between water consumption and benefits. For example, agricultural water users may use a large amount of water but have relatively low benefits, while industrial water users may use a moderate amount of water but have high benefits. In other words, the corresponding weight can be set according to industry characteristics. (2) Water use efficiency: Water users with high water use efficiency may generate higher benefits with the same water use. In other words, the water use efficiency of each water user can be evaluated based on historical data and the weight can be set accordingly. (3) Water resource scarcity: In areas with scarce water resources, the value of saving water may be higher. In other words, the impact of water resource scarcity on weight setting can be considered. (4) Balance between economic benefits and environmental protection: When setting weights, it is also necessary to consider the balance between economic benefits and environmental protection. It is necessary to ensure the economic benefits of water users while avoiding damage to the environment caused by excessive water use.

[0078] Therefore, by setting the weight standard through function fitting relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are set more scientific and reasonable, and provide strong support for subsequent water resources allocation and economic benefit evaluation.

[0079] S33, weight ω1 based on the standardized average historical annual water consumption and average historical annual income of each water user j ω2 j , calculate the comprehensive economic benefit index of each water user, namely:

[0080] CES j =ω1 j ×Z1 j +ω2 j ×Z2 j

[0081] Among them, CES j Represents the comprehensive economic benefit index of each water user j.

[0082] In this embodiment, the purpose of calculating the comprehensive economic benefit index of each water user is to combine the standardized water consumption and benefit indicators into a comprehensive economic benefit index by weighted summation, taking into account both the impact of water consumption and the impact of benefits, and thus balancing them according to their importance (i.e., weight).

[0083] S34. Standardize the comprehensive economic benefit indicators of each water user to obtain the relative weight of the economic benefit of each water user, that is:

[0084]

[0085] Among them, w j Represents the relative weight of economic benefits of water user j.

[0086] In this embodiment, the relative weight of the economic benefits of each water user reflects the contribution or importance of each water user in the overall economic benefits, that is, the higher the weight, the better the economic benefit performance of the water user, and the greater the contribution to the overall economic benefits. Therefore, the annual water use income of the water user can be obtained by the relative weight of the economic benefits under the condition of obtaining the annual water consumption of the water user.

[0087] S35. Based on the optimal water allocation model, the constraints of the annual water consumption of each water user are obtained, and the maximum water use income of all water users in the year is calculated according to the relative weight of the economic benefits of each water user and the annual water consumption of each water user, that is:

[0088]

[0089] Among them, ζ represents the maximum water use income of all water users in the year, Q j represents the annual water consumption of water user j in that year, a ijc represents the allocated water volume corresponding to the water use activity c of water user j in the ith water use department, where c represents the water use activity and C represents the total amount of water use activity.

[0090] In this embodiment, the purpose of calculating the maximum water use benefits of all water users in the year is to evaluate the economic effect of water resource allocation, that is, how the use of water resources is converted into economic benefits.

[0091] S4. Calculate the total net income of all water users for the year based on the total net income of each water user for the year and the permitted pollutant emissions allocated to the water user.

[0092] Specifically, the calculation formula for the total net income of all water users in the year in step S4 is:

[0093]

[0094] Among them, T Benefit represents the total net income of all water users in the year, B j represents the total net benefit of water user j, A cj represents the scale of water user j in water use activity c, B cj represents the net benefit obtained by water user j in water use activity c, and β represents the cost of pollutant emissions.

[0095] In this embodiment, the purpose of calculating the total net income of all water users in the year is to evaluate the economic performance of the entire water resource utilization system, that is, to comprehensively consider the net income obtained by water users in different water use activities and the costs incurred due to pollutant emissions. By calculating the total net income, the overall economic benefits of water resource utilization activities can be understood, providing decision support for policy makers, water resource managers and water users.

[0096] S5. If the total net income of all water users in the year is less than the maximum water use income of all water users in the year, groundwater ecological compensation shall be made to each water user department;

[0097] Among them, the standard for groundwater ecological compensation for each water-using department is: subtract the total net income of all water users in the year from the maximum water use income of all water users in the year and divide it by all water users to obtain the compensation income of each water user in the year, and multiply it by the water users of each water-using department in the year to obtain the compensation income of each water-using department in the year.

[0098] In this example, when the total net income of all water users in the year is less than the maximum water income of all water users in the year, it may mean that the use of water resources has not achieved the optimal economic efficiency, or there are externalities (such as environmental damage) that have not been fully internalized into the costs of water users. Therefore, it is necessary to provide groundwater ecological compensation to each water-using department. Its purpose is to: (1) promote the efficient use of water resources; through the compensation mechanism, encourage water users to use water resources more efficiently, reduce waste, and improve the overall utilization efficiency of water resources; (2) internalize environmental externalities; groundwater ecological compensation can be regarded as compensation for the environmental damage (such as groundwater level decline, water quality pollution, etc.) that may be caused in the process of water resource use. A type of economic compensation; this type of compensation helps to internalize environmental externalities into the costs of water users, thereby encouraging water-using departments or water users to adopt more environmentally friendly water use methods; (3) Fair distribution of water resource benefits: When some water users obtain higher benefits due to efficient use of water resources, part of the benefits can be distributed to other water users or used for ecological restoration through a compensation mechanism, which helps to achieve fair distribution of water resource benefits; (4) Protection of groundwater ecosystems: Groundwater is a precious natural resource that is vital to maintaining ecological balance and human life; through groundwater ecological compensation, funds can be raised for the protection and restoration of groundwater resources, ensuring the health and sustainable use of groundwater ecosystems.

[0099] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

[0100] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A method for calculating groundwater ecological compensation standards based on reasonable water allocation, characterized in that: The following steps are involved: S1. Obtain the historical water consumption and historical output of each water-using department in the study area and conduct nonlinear regression analysis to calculate the output influencing factors of each water-using department, and establish an optimal water allocation model based on the total available water resources of groundwater in the study area to obtain the optimal allocated water volume; S2. Based on the water demand of each water user, the total water demand of the study area and the pollution absorption capacity of the water body, a pollutant emission allowance model for water users is established to obtain the pollutant emission allowance allocated to water users; S3. Count the historical annual water consumption and historical annual income of each water user, calculate the relative weight of the economic income of each water user, and at the same time, based on the optimal water allocation model, obtain the constraints of the annual water consumption of each water user in that year, and calculate the maximum water income of all water users in that year based on the relative weight of the economic income of each water user and the annual water consumption of each water user in that year; S4. Calculate the total net income of all water users for the year based on the total net income of each water user for the year and the permitted pollutant emissions allocated to the water user; S5. If the total net income of all water users in the year is less than the maximum water use income of all water users in the year, groundwater ecological compensation shall be made to each water user department; Among them, the standard for groundwater ecological compensation for each water-using department is: subtract the total net income of all water users in the year from the maximum water use income of all water users in the year and divide it by all water users to obtain the compensation income of each water user in the year, and multiply it by the water users of each water-using department in the year to obtain the compensation income of each water-using department in the year.

2. The method for calculating groundwater ecological compensation standards based on reasonable water allocation according to claim 1 is characterized in that: The yield impact factor is the contribution of the water consumption of the water-using department to its output. The larger the yield impact factor, the higher the water utilization efficiency of the water-using department, and the smaller the yield impact factor, the lower the water utilization efficiency of the water-using department.

3. The method for calculating groundwater ecological compensation standards based on reasonable water allocation according to claim 2 is characterized in that: Step S1 specifically includes: S11. Obtain the historical water consumption and historical output of each water-using department in the study area, and after data cleaning and preprocessing, use nonlinear regression analysis to calculate the output influencing factors of each water-using department, namely: ln(y i )=ln(α)+k i ·ln(x i )+e i Where ln represents the logarithmic function, i represents the water-using sector, and y i represents the historical output of the i-th water-using sector, k i represents the production influencing factor of the i-th water-using sector, x i represents the historical water consumption of the ith water-using department, α represents the fitting coefficient, and ε i represents the random error term; S12. Based on the total amount of available groundwater resources in the study area and combined with the production influencing factors of each water-using department, an optimal water allocation model is established to obtain the optimal allocated water volume, namely: Among them, Q opt,i represents the optimal water allocation of the i-th water-using department, f represents the optimal water allocation model, Y i represents the historical output of the i-th water-using department, R represents the total available groundwater resources in the study area, Max represents the maximum value, n represents the number of water-using departments, and al i represents the amount of water allocated to the ith water-using department, d i represents the water demand of the i-th water-using department, st represents the requirement to satisfy it, Indicates any character.

4. The method for calculating groundwater ecological compensation standards based on reasonable water allocation according to claim 3 is characterized in that: The pollutant emission model of the water user in step S2 is: T t,j =(d t,j / D t )×E t Among them, j represents the water user, T t,j represents the permitted pollutant emission amount allocated to water user j in time period t, d t,j represents the water demand of water user j in time period t, D t represents the total water demand in the study area during period t, E t It represents the pollution-absorbing capacity of the water body within the time period t.

5. The method for calculating groundwater ecological compensation standards based on reasonable water allocation according to claim 4 is characterized in that: Step S3 specifically includes: S31. Count the historical annual water consumption and historical annual income of each water user, and use the Z-score standardization method to standardize and average them to obtain the standardized average historical annual water consumption and average historical annual income of each water user, that is: Among them, Z1 j,i1 represents the standardized historical annual water consumption of water user j in year i1, Z2 j,i1 represents the standardized historical annual income of water user j in year i1, X1 j,i1 represents the historical annual water consumption of water user j in year i1, X2 j,i1 represents the historical annual income of water user j in the i1th year, μ1 and μ2 represent the means of the historical annual water consumption and historical annual income of water user j, σ1 and σ2 represent the standard deviations of the historical annual water consumption and historical annual income of water user j, respectively, and Z1 j 、Z2 j They represent the standardized average historical annual water consumption and average historical annual income of water user j, and m represents the total number of water users; S32, perform function fitting on the historical annual water consumption and historical annual income of each water user to set the weight judgment standard, and obtain the weight ω1 of the standardized average historical annual water consumption and average historical annual income of each water user j ω2 j , the specific process is: Perform function fitting on the historical annual water consumption and historical annual income of each water user to obtain the function fitting relationship; If the function fitting relationship is a linear relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are set to be equal, that is, ω1 j =ω2 j And satisfy the relationship ω1 j +ω2 j =1; If the function fitting relationship is a nonlinear relationship, the weights of the standardized average historical annual water consumption and average historical annual income of each water user are set as ω1 j ω2 j , and satisfy the relationship ω1 j +ω2 j =1; S33, weight ω1 based on the standardized average historical annual water consumption and average historical annual income of each water user j ω2 j , calculate the comprehensive economic benefit index of each water user, namely: CES j =ω1 j ×Z1 j +ω2 j ×Z2 j Among them, CES j It represents the comprehensive economic benefit index of each water user j; S34. Standardize the comprehensive economic benefit indicators of each water user to obtain the relative weight of the economic benefit of each water user, that is: Among them, w j represents the relative weight of the economic benefits of water user j; S35. Based on the optimal water allocation model, the constraints of the annual water consumption of each water user are obtained, and the maximum water use income of all water users in the year is calculated according to the relative weight of the economic benefits of each water user and the annual water consumption of each water user, that is: Among them, ζ represents the maximum water use income of all water users in the year, Q j represents the annual water consumption of water user j in that year, a ijc represents the allocated water volume corresponding to the water use activity c of water user j in the ith water use department, where c represents the water use activity and C represents the total amount of water use activity.

6. The method for calculating groundwater ecological compensation standards based on reasonable water allocation according to claim 5 is characterized in that: The calculation formula for the total net income of all water users in the year in step S4 is: Among them, T Benefit represents the total net income of all water users in the year, B j represents the total net benefit of water user j, A cj represents the scale of water user j in water use activity c, B cj represents the net benefit obtained by water user j in water use activity c, and β represents the cost of pollutant emissions.

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