A calculation method for groundwater ecological compensation standards based on reasonable water volume allocation

Abstract

The present invention relates to the technical field of water resource management, and discloses a calculation method for the groundwater ecological compensation standard based on reasonable water volume allocation, which includes the following steps: establishing an optimal water volume allocation model to obtain the optimal allocated water volume; establishing a pollutant permitted emission model for water users to obtain the pollutant permitted emissions allocated to water users; statistically analyzing the historical annual water consumption and annual income of water users, calculating the relative weight of the economic income of water users, and based on the optimal water volume allocation model, obtaining the constraint conditions for the annual water consumption of each water user, and calculating the maximum annual water use income of all water users; calculating the total annual net income of all water users according to the pollutant permitted emissions allocated to water users; if the total annual net income of all water users is less than the maximum annual water use income of all water users, then conduct groundwater ecological compensation for the water use department; this method promotes the efficient utilization of water resources and realizes the optimal allocation and ecological compensation of groundwater resources.

Description

Technical Field

[0001] The present invention relates to the technical field of water resource management, and particularly relates to a calculation method for groundwater ecological compensation standards based on reasonable water volume allocation. Background Art

[0002] At present, the existence of the problem of water resource shortage makes the reasonable allocation and ecological protection of groundwater resources particularly important. However, traditional groundwater management methods ignore the importance of ecological compensation, resulting in over-exploitation of groundwater resources, thus causing ecological environment problems; therefore, there is an urgent need for a scientific and reasonable method to calculate groundwater ecological compensation standards to promote the sustainable utilization of groundwater resources and the improvement of the ecological environment. Summary of the Invention

[0003] In view of the above deficiencies in the prior art, the present invention provides a calculation method for groundwater ecological compensation standards based on reasonable water volume allocation. By comprehensively considering the historical water consumption, production impact factors, economic benefits of each department, and the total available water resources and pollution absorption capacity of groundwater in the research area, the optimal allocation of groundwater resources and ecological compensation are realized, thus solving the ecological environment problems caused by over-exploitation of groundwater resources in traditional groundwater management methods.

[0004] In order to achieve the above invention purpose, the technical solution adopted by the present invention is as follows:

[0005] A calculation method for groundwater ecological compensation standards based on reasonable water volume allocation, comprising the following steps:

[0006] S1. Obtain the historical water consumption and historical production of each water-using department in the research area and conduct non-linear regression analysis, calculate the production impact factors of each water-using department, and establish an optimal water volume allocation model based on the total available water resources of groundwater in the research area for obtaining the optimal allocated water volume;

[0007] S2. Based on the water demand of each water user, the total water demand of the research area, and the pollution absorption capacity of the water body, establish a pollutant permit emission model for water users for obtaining the pollutant permit emissions allocated to water users;

[0008] S3. Statistically analyze the historical annual water consumption and historical annual income of each water user, calculate the relative economic benefit weight of each water user, and at the same time, based on the optimal water volume allocation model, obtain the constraint conditions for the annual water consumption of each water user, and calculate the maximum annual water use benefit of all water users based on the relative economic benefit weight of each water user and the annual water consumption of each water user in the current year;

[0009] S4. Calculate the total annual net income of all water users according to the total annual net income of each water user and the pollutant permit emissions allocated to water users;

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

[0011] Among them, the standard for ecological compensation for groundwater in each water use department is as follows: Subtract the total net income of all water users in the current year from the maximum water use income of all water users in the current year, then divide by all water users to obtain the compensation income of each water user in the current year, and multiply by the number of water users in each water use department in the current year to obtain the compensation income of each water use department in the current year.

[0012] Furthermore, the yield impact factor is the degree of contribution of the water consumption of the water use department to its yield. And the larger the yield impact factor, the higher the water use efficiency of the water use department; the smaller the yield impact factor, the lower the water use efficiency of the water use department.

[0013] Furthermore, step S1 specifically includes:

[0014] S11. Obtain the historical water consumption and historical yield of each water use department in the research area. After data cleaning and preprocessing, use the non - linear regression analysis method to calculate the yield impact factor of each water use department, that is:

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

[0016] Among them, ln represents the logarithmic function, i represents the water use department, y i represents the historical yield of the i - th water use department, k i represents the yield impact factor of the i - th water use department, x i represents the historical water consumption of the i - th water use department, α represents the fitting coefficient, and ε i represents the random error term;

[0017] S12. Based on the total available water resources of groundwater in the research area and combined with the yield impact factors of each water use department, establish an optimal water allocation model to obtain the optimal allocated water volume, that is:

[0018]

[0019] Among them, Q opt,i represents the optimal allocated water volume of the i - th water use department, f represents the optimal water allocation model, y i represents the historical yield of the i - th water use department, k i represents the yield impact factor of the i - th water use department, R represents the total available water resources of groundwater in the research area, Max represents taking the maximum value, n represents the number of water use departments, ali represents the allocated water volume of the \(i\)-th water use department, \(d\) i represents the water demand of the \(i\)-th water use department, s.t. means to make it satisfy represents any symbol

[0020] Furthermore, the pollutant permitted emission model of water users in step S2 is as follows:

[0021] T t,j =(d t,j / D t )×E t

[0022] where \(j\) represents a water user, and \(T\) t,j represents the pollutant permitted emission allocated to water user \(j\) within time period \(t\), \(d\) t,j represents the water demand of water user \(j\) within time period \(t\), \(D\) t represents the total water demand of the research area within time period \(t\), \(E\) t represents the pollutant assimilation capacity of the water body within time period \(t\).

[0023] Furthermore, step S3 specifically includes:

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

[0025]

[0026] where \(Z1\) j,i1 represents the historical annual water consumption of water user \(j\) in the \(i1\)-th year after standardization, \(Z2\) j,i1 represents the historical annual income of water user \(j\) in the \(i1\)-th year after standardization, \(X1\) j,i1 represents the historical annual water consumption of water user \(j\) in the \(i1\)-th year, \(X2\) j,i1 represents the historical annual income of water user \(j\) in the \(i1\)-th year, \(\mu1\) and \(\mu2\) respectively represent the mean values of the historical annual water consumption and historical annual income of water user \(j\), \(\sigma1\) and \(\sigma2\) respectively represent the standard deviations of the historical annual water consumption and historical annual income of water user \(j\), \(Z1\) j and \(Z2\) j respectively 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 criteria, and obtain the weights \(\omega1\) j and \(\omega2\) j, the specific process is as follows:

[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, set the weights of the standardized average historical annual water consumption and average historical annual income of each water user to equal weights, that is, ω1 j = ω2 j And satisfy the relationship ω1 j + ω2 j = 1;

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

[0031] S33. Based on the weights ω1 j , ω2 j of the standardized average historical annual water consumption and average historical annual income of each water user, calculate the comprehensive economic benefit index of each water user, that is:

[0032] CES j = ω1 j × Z1 j + ω2 j × Z2 j

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

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

[0035]

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

[0037] S35. Based on the water volume optimal allocation model, obtain the constraint conditions of the annual water consumption of each water user, and calculate the maximum annual water use benefit of all water users according to the relative economic benefit weight of each water user and the annual water consumption of each water user, that is:

[0038]

[0039] Among them, ζ represents the maximum annual water use benefit of all water users, Qj represents the annual water consumption of water user j in the current year, a ijc represents the allocated water volume corresponding to the water use activity c of water user j in the i-th water use department. c represents the water use activity, and C represents the total amount of water use activities.

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

[0041]

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

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

[0044] A calculation method for groundwater ecological compensation standards based on reasonable water volume allocation proposed by the present invention realizes the optimal allocation of groundwater resources and ecological compensation by comprehensively considering the historical water consumption of each department, the production impact factor, the economic benefit, and the total available groundwater resources and pollution absorption capacity of the research area, promotes the efficient use of water resources, and at the same time provides economic compensation for the possible environmental damage caused during the water resource use process, which helps to internalize the environmental externality into the cost of water users, thereby prompting water users to adopt more environmentally friendly water use methods and solving the ecological and environmental problems caused by over-exploitation of groundwater resources in traditional groundwater management methods; secondly, by distributing part of the income to other water users or for ecological restoration through the compensation mechanism, it helps to achieve a fair distribution of water resource income, thereby ensuring the health and sustainable use of the groundwater ecosystem. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic flow chart of a calculation method for groundwater ecological compensation standards based on reasonable water volume allocation proposed by the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0046] The following describes the specific implementation manners of the present invention to facilitate those skilled in the art of the present technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation manners. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions created using the concept of the present invention are within the scope of protection.

[0047] Such as Figure 1As shown in the figure, a calculation method for the groundwater ecological compensation standard based on the reasonable allocation of water volume includes the following steps S1 - S5:

[0048] S1. Obtain the historical water consumption and historical output of each water - using department in the research area, conduct a non - linear regression analysis, calculate the output influence factor of each water - using department, and establish an optimal water volume allocation model based on the total available water resources of the groundwater in the research area to obtain the optimal allocated water volume.

[0049] In this embodiment, the purpose of establishing the optimal water volume allocation model is as follows: Firstly, through optimized allocation, ensure that water resources can flow to the department with the highest utilization efficiency, thereby improving the overall water resource utilization efficiency; Secondly, during the process of optimized allocation, ensure that the basic needs of each water - using department are met, avoiding affecting normal production and living activities due to water resource shortage; At the same time, through reasonable water resource allocation, support the development of various departments such as agriculture, industry, and domestic use, providing a strong guarantee for regional economic growth and social stability; Finally, under the limited total water resources, through scientific allocation and management, ensure the sustainable utilization of water resources and avoid environmental problems caused by over - exploitation and waste.

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

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

[0052] S11. Obtain the historical water consumption and historical output of each water - using department in the research area. After data cleaning and pre - processing, use the non - linear regression analysis method to calculate the output influence factor of each water - using department, that is:

[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 department, y i represents the historical output of the i - th water - using department, k i represents the output influence factor of the i - th water - using department, x i represents the historical water consumption of the i - th water - using department, α represents the fitting coefficient, and ε i represents the random error term.

[0055] In this embodiment, the purpose of data cleaning and preprocessing is to ensure the accuracy of historical water consumption and historical production data. Data cleaning and preprocessing include outlier handling and missing value filling. In addition, the purpose of this step is to establish a non-linear relationship between historical water consumption and historical production to quantify water use efficiency, that is, the production impact factor, for subsequent steps to calculate the optimal allocated water volume.

[0056] S12. Based on the total available water resources of groundwater in the study area and combined with the production impact factors of each water use department, establish an optimal water allocation model to obtain the optimal allocated water volume, that is:

[0057]

[0058] where Q opt,i represents the optimal allocated water volume of the i-th water use department, f represents the optimal water allocation model, R represents the total available water resources of groundwater in the study area, Max represents taking the maximum value, n represents the number of water use departments, al i represents the allocated water volume of the i-th water use department, d i represents the water demand of the i-th water use department, s.t. means to make it satisfy, represents any symbol.

[0059] In this embodiment, under the given limit of the total available water resources of groundwater, the optimal water allocation model optimizes the allocated water volume of each water use department to maximize the water use benefit, where represents the product of the water use benefits of all water use departments, can be understood as the relative water use benefit of the i-th water use department under the given allocated water volume. When the allocated water volume al i is close to or reaches the water demand d i the water use benefit of this department is close to 1. When the allocated water volume is much lower than the water demand, the benefit generated by water use will decrease significantly, and the degree of decrease is determined by the production impact factor. Therefore, the larger the production impact factor, the higher the water utilization rate of this department. Thus, when the water volume is insufficient, its water use benefit decreases faster. Therefore, based on this balance setting, calculate the optimal allocated water volume to solve the problem of over-exploitation of groundwater resources.

[0060] S2. Based on the water demands of each water user, the total water demand of the study area, and the pollutant assimilation capacity of the water body, establish a pollutant emission permit model for water users to obtain the pollutant emission permits allocated to water users.

[0061] In this embodiment, by considering the pollutant permitted emissions of water users, the economic benefits generated by water users in pollutant emissions can be calculated in subsequent steps. The purposes are as follows: (1) Taking the water body's pollutant carrying capacity in the study area as the total control target, by allocating specific pollutant permitted emissions to each water user, it is ensured that the total pollutant emissions in the entire area do not exceed the environmental carrying capacity, preventing environmental pollution. (2) By reasonably determining the pollutant permitted emissions of each water user, water users can be guided to adopt 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: reducing the indirect economic benefits brought about by the improvement of environmental quality due to pollutant emissions, such as reducing pollution treatment costs and improving ecosystem service functions. Although these benefits are difficult to directly quantify, they should be considered in economic decision-making.

[0062] Specifically, the pollutant permitted emissions model of water users in step S2 is as follows:

[0063] T t,j =(d t,j / D t )×E t

[0064] Where j represents the water user, and T t,j represents the pollutant permitted emissions allocated to water user j within time period t, d t,j represents the water demand of water user j within time period t, D t represents the total water demand of the study area within time period t, and E t represents the pollutant carrying capacity of the water body within time period t.

[0065] S3. Statistically analyze 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 volume allocation model, obtain the constraint conditions for the annual water consumption of each water user, and calculate the maximum annual water use income of all water users based on the relative weight of the economic income of each water user and the annual water consumption of each water user in the current year.

[0066] In this embodiment, each water supply department supplies water to the corresponding water users. Therefore, after establishing the optimal water volume allocation model, the constraint conditions for the annual water consumption of each water user can be obtained, that is:

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

[0068] S31. Statistically analyze the historical annual water consumption and historical annual income of each water user, standardize them using the Z-score standardization method, and then calculate the average value 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 historical annual water consumption of the i1-th year standardized for water user j, and Z2 j,i1 represents the historical annual income of the i1-th year standardized for water user j. X1 j,i1 represents the historical annual water consumption of water user j in the i1-th year, and X2 j,i1 represents the historical annual income of water user j in the i1-th year. μ1 and μ2 respectively represent the means of the historical annual water consumption and historical annual income of water user j, and σ1 and σ2 respectively represent the standard deviations of the historical annual water consumption and historical annual income of water user j. Z1 j and Z2 j respectively represent the standardized average historical annual water consumption and average historical annual income of water user j. m represents the total number of water users.

[0071] In this embodiment, the purpose of using the Z-score standardization method for standardization is as follows: (1) Enhanced comparability; through Z-score standardization, data with different dimensions or magnitudes are converted to the same scale, enabling direct comparison of the historical annual water consumption and historical annual income between different water users and enhancing the comparability of the data; (2) Elimination of the influence of outliers; the standardization process helps reduce the influence of extreme values (i.e., outliers) on the overall data distribution, making the analysis results more robust; (3) Providing a basis for subsequent analysis; the standardization process helps reduce the influence of extreme values (i.e., outliers) on the overall data distribution, making the analysis results more robust; (4) Revealing the relative position; the Z-score value represents the relative position of the observed value in the data distribution, that is, its distance from the average value (in units of the 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 as follows: the standardized average historical annual water consumption reflects the relatively average water consumption level of the water user over a past period, while the standardized average historical annual income reflects its relatively average economic benefit level. Through these two indicators, the performance of water users in water resource utilization and economic benefits can be preliminarily evaluated, providing 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 criteria, and obtain the weights ω1 of the standardized average historical annual water consumption and average historical annual income of each water userj 、 ω2 j , the specific process is as follows:

[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, etc., or it can also be a programming language with data analysis functions (such as the Pandas, NumPy, SciPy, or Matplotlib libraries in Python, and specialized machine learning libraries such as scikit-learn). Use the statistical software for data analysis to obtain the functional relationship between the historical annual water consumption and the historical annual income, so as to use this functional relationship to set the weight judgment criteria.

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

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

[0077] In this embodiment, when the function fitting relationship is a non-linear relationship, the weights ω1 j 、 ω2 j of the standardized average historical annual water consumption and average historical annual income of each water user, generally ω1 j = 0.4, ω2 j= 0.6; and the weight is set based on the analysis of historical data of water users in different industries and of different scales, combined with the actual relationship between water consumption and benefits and how these relationships affect water resource allocation 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 have a large amount of water consumption but relatively low benefits, while industrial water users may have moderate water consumption but relatively high benefits. That is, 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 under the same amount of water consumption. That is, 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 water resource scarcity, the value of water conservation may be higher. That is, 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 the function fitting relationship, the weights of the standardized average historical annual water consumption and average historical annual benefits of each water user are made more scientific and reasonable, and provide strong support for subsequent water resource allocation and economic benefit evaluation.

[0079] S33. Based on the weights ω1 j 、ω2 j of the standardized average historical annual water consumption and average historical annual benefits of each water user, calculate the comprehensive economic benefit index of each water user, that is:

[0080] CES j = ω1 j × Z1 j + ω2 j × Z2 j

[0081] where 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: by means of weighted summation, the standardized water consumption and benefit indexes are combined into a comprehensive economic benefit index, considering both the impact of water consumption and the impact of benefits, and thus balancing according to their importance (i.e., weight).

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

[0084]

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

[0086] In this embodiment, the relative weights of the economic benefits of each water user reflect the contribution or importance of each water user in the overall economic benefit, 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 benefit. Therefore, under the condition of obtaining the annual water consumption of the water user through this relative weight of economic benefit, the annual water use benefit of the water user can be obtained.

[0087] S35. Based on the optimal water volume allocation model, obtain the constraint conditions of the annual water consumption of each water user, and calculate the maximum annual water use benefit of all water users according to the relative weights 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 annual water use benefit of all water users, Q h represents the annual water consumption of water user j, a ijc represents the allocated water volume corresponding to the water use activity c of water user j in the i-th water use department, c represents the water use activity, and C represents the total amount of water use activities.

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

[0091] S4. Calculate the total annual net benefit of all water users according to the total annual net benefit of each water user and the pollutant permit emissions allocated to the water user.

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

[0093]

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

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

[0096] S5. If the total net income of all water users in the current year is less than the maximum water use income of all water users in the current year, then ecological compensation for groundwater is carried out for each water use department;

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

[0098] In this embodiment, when the total net income of all water users in the current year is less than the maximum water use income of all water users in the current year, it may mean that the use of water resources has not reached 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 carry out ecological compensation for groundwater for each water use department. The purposes are as follows: (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; ecological compensation for groundwater can be regarded as an economic compensation for possible environmental damage (such as groundwater level decline, water quality pollution, etc.) during the process of using water resources; this compensation helps to internalize environmental externalities into the costs of water users, thereby prompting water use departments or water users to adopt more environmentally friendly water use methods; (3) Fairly distribute water resource benefits; when some water users obtain higher benefits due to the efficient use of water resources, through the compensation mechanism, part of the benefits are distributed to other water users or used for ecological restoration, which helps to achieve the fair distribution of water resource benefits; (4) Protect the groundwater ecosystem; groundwater is a precious natural resource, which is crucial for maintaining ecological balance and human life; through ecological compensation for groundwater, funds can be raised for the protection and restoration of groundwater resources, ensuring the health and sustainable utilization of the groundwater ecosystem.

[0099] In the present invention, specific embodiments are used to elaborate on the principles and implementation methods of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

[0100] Those of ordinary skill in the art will realize that the embodiments described herein are for helping the reader understand the principles of the present invention, and it should be understood that the scope of protection of the present invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific deformations and combinations that do not depart from the essence of the present invention based on these technical revelations disclosed by the present invention, and these deformations and combinations are still within the scope of protection 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; Among them, the optimal water allocation model is: 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 sector, k i represents the production influencing factor 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 symbol; 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; Among them, the pollutant emission model of water users 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 absorption capacity of the water body in the period t; 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.

4. The method for calculating groundwater ecological compensation standards based on reasonable water allocation according to claim 3 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.

5. The method for calculating groundwater ecological compensation standards based on reasonable water allocation according to claim 4 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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