Water environment capacity distribution method and system suitable for cross-administrative district

Abstract

The invention provides a cross-administrative-region water environment capacity allocation method and system. The method comprises the following steps: acquiring human-land resource data basic data of each administrative region in a target region; calculating the overall water environment capacity of the river based on the human-land resource data basic data; based on economic factors, social population factors and resource and environment factors, three level indexes are divided, and a sub-index system of each level index is established; obtaining a water environment capacity distribution coefficient of each administrative region planning level year based on a sub-index system; and based on the overall water environment capacity of the river and the water environment capacity distribution coefficient of the planning level year of each administrative region, performing water environment capacity distribution of the planning level year. The method can be suitable for an index system for cross-administrative region water environment capacity allocation, has the characteristics of universality, objectivity and quantifiability with the index system, fully considers heterogeneity of each region, and effectively guarantees economic optimality and fairness of a cross-administrative region water environment capacity allocation scheme.

Description

Technical Field

[0001] The present application belongs to the technical field of water environment capacity allocation, and relates to a water environment capacity allocation method, and in particular to a water environment capacity allocation method and system applicable to cross-administrative regions that comprehensively considers multiple indicators such as economic factors, social demographic factors, resources and environmental factors. Background Art

[0002] Water environment capacity refers to the ability of water bodies to accommodate and dilute pollutants in the natural environment, thereby maintaining a certain environmental quality. It is not only an objectively existing natural ecological resource, but also an environmental resource with a social and demographic nature.

[0003] In the past, river basins as spatial units for total capacity control often failed to meet the requirements of actual operations and were unable to resolve the increasingly serious administrative cross-border pollution disputes, which seriously restricted the development of my country's water environment total capacity control work.

[0004] How to reasonably allocate water environment capacity in complex river basins across administrative regions, how to take into account regional heterogeneity and the operability of local administrative management, how to balance the fairness, economy and scientificity of the allocation plan, and how to comprehensively consider the interests of multiple parties, especially to find a balance between the different needs of all parties involved in capacity allocation, are the key and difficulty of cross-domain water pollution control.

[0005] At present, a series of studies on water environment capacity allocation have been carried out at home and abroad, but there are relatively few studies across administrative regions. More research efforts are still needed on how to select appropriate allocation elements, allocation indicators, and allocation methods.

[0006] Therefore, in the existing water environment capacity allocation technology, how to reasonably allocate water environment capacity in complex river basins across administrative regions, combine regional heterogeneity and take into account the operability of local administrative management, and how to select appropriate allocation elements, allocation indicators, and allocation methods in cross-administrative region research are urgent issues to be solved. Summary of the invention

[0007] In view of the shortcomings of the prior art mentioned above, the purpose of the present application is to provide a method and system for allocating water environment capacity across administrative regions, which is used to solve the problem that in the existing water environment capacity allocation across administrative regions, due to excessive reliance on human decision-making, the heterogeneous characteristics of economic factors, socio-demographic factors, resources and environmental factors of each administrative region cannot be comprehensively considered in complex river basins across administrative regions, which in turn leads to the inability to maximize and scientifically realize the configuration of water environment capacity.

[0008] To achieve the above-mentioned purpose and other related purposes, in the first aspect, the present application provides a method for allocating water environment capacity applicable to cross-administrative regions, comprising the following steps: obtaining basic data of human and land resource information of each administrative region within the target area; calculating the overall water environment capacity of the rivers within the target area based on the basic data of human and land resource information; dividing indicators into three levels based on economic factors, social demographic factors, resource and environmental factors and the overall water environment capacity of the rivers, and establishing a sub-indicator system for indicators at each level; the three levels of indicators include: first-level indicators, second-level indicators and third-level indicators; obtaining the water environment capacity allocation coefficient of each administrative region in the planning year based on the sub-indicator system; and allocating the water environment capacity for the planning year based on the overall water environment capacity of the rivers and the water environment capacity allocation coefficient of each administrative region in the planning year.

[0009] In an implementation method of the first aspect, the basic data of human and land resources information of each administrative region includes: any one or more combinations of the population, gross national product, water area, length of water functional area, water quality targets of water functional area, and sewage problems of each administrative region in the current level year and the planned level year.

[0010] In an implementation of the first aspect, the first-level indicators include: water environment capacity allocation indicators based on economic factors; the second-level indicators include: water environment capacity allocation indicators based on socio-demographic factors; the third-level indicators include: water environment capacity allocation indicators based on resource and environmental factors.

[0011] In an implementation of the first aspect, the establishment of the water environment capacity allocation index based on economic factors includes the following steps: obtaining the water environment capacity allocation index based on economic factors based on the current pollution discharge per unit GDP of each administrative area and the planned annual pollution discharge per unit GDP; including: calculating the current total pollution discharge per unit GDP of each district and town, the planned annual total pollution discharge per unit GDP, and the current and planned annual pollution discharge coefficient per unit GDP of each district and town based on the basic data of human and land resources information of each administrative area; normalizing and converting the pollution discharge coefficient per unit GDP of each district and town to obtain the normalized current pollution discharge coefficient per unit GDP of each district and town and the normalized planned annual pollution discharge coefficient per unit GDP of each district and town; weighted calculation of the normalized current pollution discharge coefficient per unit GDP of each district and town and the normalized planned annual pollution discharge coefficient per unit GDP of each district and town to obtain the water environment capacity allocation index based on economic factors of each district and town.

[0012] In an implementation of the first aspect, the calculation formula of the water environment capacity allocation index based on economic factors is:

[0013]

[0014] include:

[0015]

[0016]

[0017] Among them, GN j Indicates the current pollution discharge per unit GDP of town in district j, unit: t / 100 million yuan; CN j Indicates the current pollutant emissions of the town in district j, unit: t; GDPN j Indicates the current annual gross national product of the town in district j, unit: 100 million yuan; DN j It represents the pollution emission coefficient per unit GDP of the j district town; GF represents the normalized current pollution emission coefficient per unit GDP of town j; j represents the annual unit GDP pollution discharge of the j district town planning level, unit: t / 100 million yuan; CF j Indicates the annual pollutant emissions of the planned town in district j, unit: t; GDPF j Indicates the annual gross national product of the planned town in district j, unit: 100 million yuan; DF j It represents the pollution emission coefficient per unit GDP in the planning level of the j district town; represents the normalized planning level annual unit GDP pollution discharge coefficient of the j district town; D j It represents the water environment capacity allocation index of the j district town based on economic factors; α represents the weight of the current unit GDP pollution discharge coefficient.

[0018] In an implementation of the first aspect, the water environment capacity allocation index based on social demographic factors includes the following steps: obtaining the water environment capacity allocation index based on social demographic factors based on the current total pollution discharge per unit population of each district and town and the planned annual total pollution discharge per unit population; including: calculating the current total pollution discharge per unit population of each district and town, the planned annual total pollution discharge per unit population, and the current and planned annual pollution discharge coefficient per unit population of each district and town based on the current total pollution discharge per unit population of each district and town and the planned annual total pollution discharge per unit population; normalizing the pollution discharge coefficient per unit population of each district and town to obtain the normalized current pollution discharge coefficient per unit population of each district and town and the normalized pollution discharge coefficient per unit population of each district and town in the planned year; performing weighted calculation based on the normalized current pollution discharge coefficient per unit population of each district and town and the normalized pollution discharge coefficient per unit population of each district and town in the planned year to obtain the water environment capacity allocation index based on social demographic factors.

[0019] In an implementation of the first aspect, the calculation formula of the water environment capacity allocation index based on social demographic factors is:

[0020]

[0021] include:

[0022]

[0023]

[0024] Among them, PN j Indicates the current unit population sewage discharge of j district town, unit: t / 10,000 people; CN j Indicates the current pollutant emissions in the j district town, unit: t; POPN j VN represents the current annual population of the town in district j, in ten thousand people; j represents the current unit population pollution coefficient of the town in district j, PF represents the normalized current unit population pollution coefficient of the j district town; j Indicates the annual per capita sewage discharge of the planned town in the j district, unit: t / 10,000 people; CF j Indicates the annual pollutant emissions of the planned town in j district, unit: t; POPF j VF represents the planned annual population of the town in the j district, unit: 10,000 people; j It represents the annual unit population pollution discharge coefficient of the planned level of the j district town; V represents the normalized planning level annual unit population pollution coefficient of the j district town; j It represents the water environment capacity allocation index of the j district town based on social demographic factors; β represents the weight of the current unit population pollution discharge coefficient.

[0025] In an implementation of the first aspect, based on the resources and environmental factors of each district and town, and in combination with the water area, length of the water functional area and water quality target of the water functional area in the basic data of human and land resources information of each administrative area, the water environment capacity allocation index based on the resources and environmental factors of each town is calculated; the calculation formula of the water environment capacity allocation index based on the resources and environmental factors of each town is:

[0026]

[0027] Among them, K j represents the water environment capacity allocation index of the j district town based on the resources and environmental factors of each town; l ij represents the length of the water function zone with water quality target in town i of district j; C i Indicates the target concentration limit of water quality; S j represents the water area of ​​the town in district j; l j represents the length of the target water functional area of ​​district j; n represents the number of districts and towns.

[0028] In an implementation of the first aspect, obtaining the water environment capacity allocation coefficient for each administrative region planning year based on the sub-indicator system includes the following steps: constructing an indicator relationship between three levels based on the sub-indicator system; obtaining the sub-indicator weights of each level based on the indicator relationship between the three levels; performing weighted calculation on the sub-indicator weights to obtain the water environment capacity allocation coefficient for each administrative region planning year; the calculation formula for the water environment capacity allocation coefficient for each administrative region planning year is:

[0029] WEC j =D j ·η+V j ·χ+K j ·δ (16)

[0030] η+χ+δ=1 (17)

[0031] Among them, WEC j represents the water environment capacity allocation coefficient of the j-district town in the horizontal planning year; D j V represents the water environment capacity allocation index of the town in district j based on economic factors; j K represents the water environment capacity allocation index of town j based on social demographic factors; j represents the water environment capacity allocation index of district j based on resource and environmental factors; η represents the sub-item weight of water environment capacity allocation index of district j based on economic factors; χ represents the sub-item weight of water environment capacity allocation index of district j based on social and demographic factors; δ represents the sub-item weight of water environment capacity allocation index of district j based on resource and environmental factors.

[0032] In the second aspect, the present application provides a water environment capacity allocation system suitable for cross-administrative regions, including: an acquisition module for acquiring basic data on human and land resource information of each administrative region within the target area; a water environment capacity calculation module for calculating the overall water environment capacity of the river in the target area based on the basic data on human and land resource information; an indicator system construction module for dividing three levels of indicators based on economic factors, social demographic factors, resource and environmental factors and the overall water environment capacity of the river, and establishing a sub-indicator system for indicators at each level; the three levels of indicators include: first-level indicators, second-level indicators and third-level indicators; an allocation coefficient calculation module for acquiring the water environment capacity allocation coefficient of each administrative region in the planning year based on the sub-indicator system; an allocation planning module for allocating water environment capacity for the planning year based on the overall water environment capacity of the river and the water environment capacity allocation coefficient of each administrative region in the planning year.

[0033] As described above, the method, system, medium and device for allocating water environment capacity across administrative regions of the present application have the following beneficial effects:

[0034] (1) The water environment capacity allocation method applicable to cross-administrative regions provided in this application and the indicator system fully consider the heterogeneous characteristics of economic factors, social demographic factors, resources and environmental factors in each administrative region, and the indicators are universal, objective and quantifiable, which helps to improve the scientificity and operability of the water environment capacity allocation method and overcome the shortcomings of previous capacity allocation schemes that mainly rely on human decision-making;

[0035] (2) When allocating water environment capacity, this application sets water environment capacity allocation indicators based on economic factors, and promotes the transformation of the industrial structure of each administrative region to promote the reduction of total pollution discharge from the perspective of economic optimization; at the same time, it sets water environment capacity allocation indicators based on social demographic factors, and avoids the situation where the water environment capacity allocation indicators based on economic factors are too strict and restrict social development from the perspective of fairness of social development, so as to balance the economic optimality and fairness of the cross-administrative region water environment capacity allocation plan;

[0036] (3) This application takes into account the temporal attributes of the indicators and integrates the current situation with the planned situation, so as to facilitate timely adjustment of the water environment capacity allocation plan in accordance with the planned situation, and provides new ideas for the management and allocation of water environment capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Shown is a flow chart of an embodiment of the method and system for allocating water environment capacity across administrative regions described in this application.

[0038] Figure 2 Shown is a flow chart of the method for allocating water environment capacity across administrative regions described in this application.

[0039] Figure 3 Shown is a flow chart of S2 in one embodiment of the method for allocating water environment capacity across administrative regions described in this application.

[0040] Figure 4 Shown is a flow chart of S3 in one embodiment of the method for allocating water environment capacity across administrative regions described in this application.

[0041] Figure 5 Shown is the intention of the water environment capacity allocation indicator system in one embodiment of the water environment capacity allocation method applicable to cross-administrative regions described in this application.

[0042] Figure 6 Shown is a flow chart of S4 in one embodiment of the method for allocating water environment capacity across administrative regions described in this application.

[0043] Figure 7Shown is a schematic diagram of the principle structure of a water environment capacity allocation system applicable to cross-administrative regions described in this application in one embodiment.

[0044] Component number description

[0045] 71 Get Module

[0046] 72 Water environment capacity calculation module

[0047] 73 Indicator system building blocks

[0048] 74 Distribution coefficient calculation module

[0049] 75 Allocation Planning Module DETAILED DESCRIPTION

[0050] The following specific examples are used to illustrate the embodiments described in this application. Those skilled in the art can easily understand the other advantages and effects described in this application from the contents disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit described in this application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0051] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept described in the present application. Therefore, the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0052] The following will describe in detail a method and system for allocating water environment capacity across administrative regions provided in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application.

[0053] See also Figure 1 and Figure 2 , respectively showing a flow chart of a method and system for allocating water environment capacity across administrative regions described in this application in one embodiment and a flow chart of a method for allocating water environment capacity across administrative regions described in this application. Figure 1 and Figure 2 As shown, this embodiment provides a method and system for allocating water environment capacity across administrative regions.

[0054] The water environment capacity allocation method applicable to cross-administrative regions specifically comprises the following steps:

[0055] S1, obtaining basic data of human and land resources in each administrative area within the target area. The basic data of human and land resources in each administrative area include but are not limited to: population, gross national product, water area, length of water function area, water quality target of water function area, sewage problems, etc. in each administrative area in the current level year and the planned level year.

[0056] In this embodiment, according to the research needs, data such as population, gross national product, water area, length of water functional area, water quality targets of water functional area, and total sewage discharge of each district and town along the river in the current level year and the planned level year are collected.

[0057] Specifically, first determine the specific administrative area where data needs to be obtained; then obtain data through official channels (such as government statistics departments, water conservancy departments, environmental protection departments, etc.) using online data platforms and academic materials; compile and organize the data on the current and planned population, gross national product, water area, length of water functional areas, water quality targets for water functional areas, total pollution discharge, etc. of each district and town along the target river; in order to facilitate the subsequent use of statistical methods and data analysis tools to analyze the collected data.

[0058] The basic data of human and land resources of each administrative region also include:

[0059] (1) River basin scope, river system distribution, river network density, river water volume, flow velocity, flow direction, water level changes, etc.;

[0060] (2) Water quality monitoring data: Obtain recent and historical water quality monitoring data of rivers, including concentration data of key indicators such as dissolved oxygen, chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, and total nitrogen;

[0061] (3) Pollution source data: Information on pollution sources such as industrial emissions, agricultural non-point source pollution, and domestic sewage discharge along the river is collated, including the location, type, emission volume, and type of pollutants of the pollution sources.

[0062] For example, by visiting the websites of the national and provincial statistics bureaus, various data including population, economy, gross national product, etc. in the target area can be collected; or data such as water area, length of water functional areas, water quality targets, etc. can be collected through the websites of the water conservancy departments and their subordinate institutions; and information on discharge permits and pollutant emissions can be collected through the websites of the environmental protection departments in order to conduct subsequent monitoring and evaluation of the actual situation.

[0063] It should be noted that the basic data of human and land resources information of each administrative area is not limited to the above-mentioned data types, and may include all data types applicable to this application.

[0064] S2, calculate the overall water environment capacity of rivers in the target area based on the basic data of human and land resources. Figure 3 , which is a flow chart of S2 in one embodiment of the water environment capacity allocation method applicable to cross-administrative regions described in this application. Figure 3 As shown, S2 comprises the following steps:

[0065] Water environment capacity allocation refers to the process of rationally allocating the maximum load of pollutants that a water body can accommodate (i.e., water environment capacity) in a specific area based on factors such as water environment quality objectives, hydrological conditions, pollutant characteristics, and socio-economic needs. This process is an important part of environmental management and water resource protection, and aims to ensure that water quality meets established standards while meeting the needs of socio-economic development.

[0066] Therefore, by rationally allocating water environment capacity, we can effectively control the total amount of pollutant emissions, protect water bodies from pollution, and maintain the sustainable use of water resources; at the same time, on the premise of ensuring that water quality meets standards, rational allocation of water environment capacity can provide necessary support and guarantee for regional economic development and promote the optimization and upgrading of industrial structure; rational allocation of water environment capacity can also help maintain the balance and stability of the water ecosystem and protect the diversity and living environment of aquatic organisms.

[0067] S21, based on the basic data of human and land resources, conduct water quality status assessment and pollution trend analysis, and identify major pollution factors and pollution areas;

[0068] S22, dividing different water quality functional zones according to demand, and setting water quality target values ​​for each water quality functional zone;

[0069] S23, construct a water environment capacity calculation model based on water quality functional zones and water quality target values;

[0070] S24, calculating the overall water environment capacity of rivers in the target area based on the water environment capacity calculation model.

[0071] In this embodiment, the water environment capacity of the entire river is calculated.

[0072] Specifically, firstly, the water quality status and pollution trend analysis are carried out based on the basic data of human and land resources; the current water quality of the target river is comprehensively evaluated to identify the main pollution factors and pollution areas. Then, different water quality functional areas are divided according to the use function and protection objectives of the river, such as drinking water source protection area, fishery water area, landscape and entertainment area, etc.; and specific water quality target values ​​are set for each functional area in combination with the actual situation of the river. Then, according to the hydrological conditions, pollutant characteristics and data of the river, a water environment capacity calculation model is constructed to calculate the water environment capacity, such as a one-dimensional water quality model, a two-dimensional water quality model or a more complex three-dimensional model; and the parameters of the water environment capacity calculation model are determined, such as: water body self-purification coefficient, diffusion coefficient, degradation rate constant, etc. Finally, the pollution source information, water quality target value and model parameters are input into the water environment capacity calculation model to perform water quality simulation and prediction, and calculate the overall water environment capacity of the river in the target area under different conditions.

[0073] S3, based on economic factors, social demographic factors, resource and environmental factors and the overall water environment capacity of the river, divide the indicators into three levels and establish a sub-indicator system for each level of indicators. The three levels of indicators include: first level indicators, second level indicators and third level indicators. Figure 4 and Figure 5 , respectively showing the flow diagram of S3 in one embodiment of the method for allocating water environment capacity across administrative regions described in this application and the water environment capacity allocation index system in one embodiment of the method for allocating water environment capacity across administrative regions described in this application. Figure 4 and Figure 5 As shown, S3 comprises the following steps:

[0074] In this embodiment, three levels are divided based on economic factors, social demographic factors, and resource and environmental factors, and a sub-indicator system for indicators at each level is established.

[0075] The first-level indicators include: water environment capacity allocation indicators based on economic factors; the second-level indicators include: water environment capacity allocation indicators based on social and demographic factors; the third-level indicators include: water environment capacity allocation indicators based on resource and environmental factors.

[0076] S31. Establish water environment capacity allocation indicators based on economic factors.

[0077] In this embodiment, the water environment capacity allocation index based on economic factors is obtained based on the current pollution discharge per unit GDP of each administrative area and the planned annual pollution discharge per unit GDP.

[0078] Specifically, based on the basic data of human and land resources information of each administrative area, the current total pollution discharge per unit GDP of each district and town, the total pollution discharge per unit GDP in the planned year, and the pollution discharge coefficient per unit GDP of each district and town in the current and planned year are calculated respectively; the pollution discharge coefficient per unit GDP of each district and town is normalized and converted to obtain the normalized current pollution discharge coefficient per unit GDP of each district and town and the normalized pollution discharge coefficient per unit GDP of each district and town in the planned year; the normalized current pollution discharge coefficient per unit GDP of each district and town and the normalized pollution discharge coefficient per unit GDP of each district and town in the planned year are weightedly calculated to obtain the water environment capacity allocation index based on economic factors for each district and town.

[0079] The calculation formula of the water environment capacity allocation index based on economic factors is:

[0080]

[0081] include:

[0082]

[0083]

[0084] Among them, GN j Indicates the current pollution discharge per unit GDP of town in district j, unit: t / 100 million yuan; CN j Indicates the current pollutant emissions of the town in district j, unit: t; GDPN j Indicates the current annual gross national product of the town in district j, unit: 100 million yuan; DN j It represents the pollution emission coefficient per unit GDP of the j district town; GF represents the normalized current pollution emission coefficient per unit GDP of town j; j Indicates the annual unit GDP pollution discharge of the planned town in the j district, unit: t / 100 million yuan; CF j Indicates the annual pollutant emissions of the planned town in j district, unit: t; GDPF j Indicates the annual gross national product of the planned town in district j, unit: 100 million yuan; DF j It represents the pollution emission coefficient per unit GDP in the planning level of the j district town; represents the normalized planning level annual unit GDP pollution discharge coefficient of the j district town; D j It represents the water environment capacity allocation index of the j district town based on economic factors; α represents the weight of the current unit GDP pollution discharge coefficient.

[0085] S32. Establish water environment capacity allocation indicators based on socio-demographic factors.

[0086] In this embodiment, the water environment capacity allocation index based on social demographic factors is obtained based on the current total pollution discharge per unit population of each district and town and the planned annual total pollution discharge per unit population.

[0087] Specifically, the current total pollution discharge per unit population of each district and town, the annual total pollution discharge per unit population at the planned level, and the pollution discharge coefficient per unit population of each district and town at the current and planned levels are calculated based on the current total pollution discharge per unit population of each district and town and the annual total pollution discharge per unit population at the planned level; the pollution discharge coefficient per unit population of each district and town is normalized to obtain the normalized current pollution discharge coefficient per unit population of each district and town and the normalized pollution discharge coefficient per unit population of each district and town at the planned level; weighted calculation is performed based on the normalized current pollution discharge coefficient per unit population of each district and town and the normalized pollution discharge coefficient per unit population of each district and town at the planned level to obtain the water environment capacity allocation index based on social demographic factors.

[0088] The calculation formula for the water environment capacity allocation index based on social demographic factors is:

[0089]

[0090] include:

[0091]

[0092]

[0093] Among them, PN j Indicates the current unit population sewage discharge of j district town, unit: t / 10,000 people; CN j Indicates the current pollutant emissions in the j district town, unit: t; POPN j VN represents the current annual population of the town in district j, in ten thousand people; j represents the current unit population pollution coefficient of the town in district j, PF represents the normalized current unit population pollution coefficient of the j district town; j Indicates the annual per capita sewage discharge of the planned town in the j district, unit: t / 10,000 people; CF j Indicates the annual pollutant emissions of the planned town in j district, unit: t; POPF j VF represents the planned annual population of the town in the j district, unit: 10,000 people; j It represents the annual unit population pollution discharge coefficient of the planned level of the j district town; V represents the normalized planning level annual unit population pollution coefficient of the j district town; j It represents the water environment capacity allocation index of the j district town based on social demographic factors; β represents the weight of the current unit population pollution discharge coefficient.

[0094] S33, establish water environment capacity allocation indicators based on the resources and environmental factors of each town.

[0095] In this embodiment, based on the resources and environmental factors of each district and town, and combined with the water area, water functional area length and water quality targets of the water functional area in the basic data of human and land resources information of each administrative area, the water environment capacity allocation index based on the resources and environmental elements of each town is calculated.

[0096] The calculation formula for the water environment capacity allocation index based on the resources and environmental elements of each town is:

[0097]

[0098] Among them, K j represents the water environment capacity allocation index of the j district town based on the resources and environmental factors of each town; l ij represents the length of the water function zone with water quality target in town i of district j; C i Indicates the target concentration limit of water quality; S j represents the water area of ​​the town in district j; l j represents the length of the target water functional area of ​​district j; n represents the number of districts and towns.

[0099] In summary, when allocating water environment capacity, this application sets water environment capacity allocation indicators based on economic factors, and from the perspective of economic optimality, promotes the transformation of the industrial structure of each administrative region to promote the trend of reducing the total amount of pollution discharge; at the same time, it sets water environment capacity allocation indicators based on social demographic factors, and from the perspective of fairness in social development, avoids the situation where social development is restricted due to the excessively strict setting of water environment capacity allocation indicators based on economic factors, thereby balancing and ensuring the economic optimality and fairness of the cross-administrative region water environment capacity allocation plan.

[0100] S4, based on the sub-indicator system, obtain the water environment capacity allocation coefficient for each administrative region in the planning level year. Figure 6 , which is a flow chart of S4 in one embodiment of the water environment capacity allocation method applicable to cross-administrative regions described in this application. Figure 6 As shown, S4 comprises the following steps:

[0101] S41, constructing the indicator relationship between the three levels based on the sub-indicator system;

[0102] S42, obtaining the weight of the sub-item indicators at each level based on the indicator relationship between the three levels;

[0103] S43, performing weighted calculation on the weights of the sub-item indicators to obtain the water environment capacity allocation coefficient of each administrative region in the planning level year.

[0104] In this embodiment, the relationship between indicators at three levels, namely economic factors, socio-demographic factors, and resource and environmental factors, is established. The weights of sub-indicators at each level are obtained by using the expert meeting method or the Delphi method. Weighted calculations are performed on the weighted indicators to obtain the water environment capacity allocation coefficient for each county in the planning year.

[0105] The calculation formula for the water environment capacity allocation coefficient of each administrative region in the planning level year is:

[0106] WEC j =D j ·η+V j ·χ+K j ·δ (16)

[0107] η+χ+δ=1 (17)

[0108] Among them, WEC j represents the water environment capacity allocation coefficient of the j-district town in the horizontal planning year; D j V represents the water environment capacity allocation index of the town in district j based on economic factors; j K represents the water environment capacity allocation index of town j based on social demographic factors; j represents the water environment capacity allocation index of the j district town based on resource and environmental factors; η represents the sub-item weight of the water environment capacity allocation index of the j district town based on economic factors; χ represents the sub-item weight of the water environment capacity allocation index of the j district town based on social population factors; δ represents the sub-item weight of the water environment capacity allocation index of the j district town based on resource and environmental factors. In addition, η, χ, and δ can be obtained by the expert meeting method or the Delphi method.

[0109] S5, allocating the water environment capacity for the planning year based on the overall water environment capacity of the river and the water environment capacity allocation coefficient for the planning year of each administrative region.

[0110] In this embodiment, the water environment capacity for the planning level year is allocated based on the overall water environment capacity of the river and the water environment capacity allocation coefficient for the planning level year of each district and town along the river.

[0111] The following is a further explanation using the T River Basin as an example combined with the above method.

[0112] In this embodiment, the T River is set as a plain river in the Taihu Lake Basin, flowing through three districts and ten towns. The water environment capacity is calculated based on the actual conditions such as water function zoning, water body characteristics and hydrological conditions. Under the condition of 90% hydrological guarantee rate, the COD water environment capacity along the T River in the planned horizontal year is calculated to be 44283.66t.

[0113] Combining the current GDP and current COD emissions of the ten towns, the current COD emissions per unit GDP can be calculated, as shown in Table 1. Formula (4) is used to calculate the current unit GDP emissions coefficient, and formula (6) is used for normalization. Combining the GDP in the planning level year and the current COD emissions, the COD emissions per unit GDP in the planning level year of each town can be calculated, as shown in Table 2. Formula (5) is used to calculate the annual unit GDP emissions coefficient, and formula (7) is used for normalization.

[0114] The Delphi method obtains that the weight of the pollution discharge coefficient per unit GDP is 0.3. The water environment capacity allocation index of each town based on economic factors can be calculated by formula (1), which is {5.54%, 10.23%, 6.25%, 8.18%, 10.42%, 12.65%, 9.34%, 5.48%, 14.40%, 17.51%}.

[0115] Table 1 Pollution emission coefficient per unit GDP of each town

[0116]

[0117] Table 2 Pollution emission coefficient per unit GDP in each town in the planning level year

[0118]

[0119]

[0120] Combining the current population of the ten towns and the current COD emissions, the current COD emissions per unit population can be calculated, as shown in Table 1. Formula (11) is used to calculate the current unit population emissions coefficient, and formula (13) is used for normalization. Combining the planned level year population and the current COD emissions, the planned level year unit population COD emissions of each town can be calculated, as shown in Table 2. Formula (12) is used to calculate the planned level year unit population emissions coefficient, and formula (14) is used for normalization.

[0121] The Delphi method obtains that the weight of the current unit population discharge coefficient is 0.5, and the water environment capacity allocation index of each town based on social population factors can be calculated by formula (8), which is {15.48%, 9.39%, 12.12%, 10.57%, 8.08%, 7.43%, 9.61%, 14.74%, 6.87%, 5.71%}.

[0122] Table 3 Current unit population pollution coefficient of each town

[0123]

[0124] Table 4 Pollution emission coefficient per unit population in each town in the planning level year

[0125]

[0126] Taking into account factors such as water area, length of water functional zone, and water quality target of water functional zone, the water environment capacity allocation index of each town based on resource and environmental factors is calculated by formula (15), and the result is {5.31%, 19.63%, 20.32%, 14.92%, 9.18%, 5.86%, 4.26%, 7.21%, 6.37%, 6.95%}.

[0127] The Delphi method was used to obtain the weights of water environment capacity allocation indicators based on economic factors, social demographic factors, resources and environmental factors, which were 0.3, 0.3 and 0.4 respectively. Formula (16) was used for weighted calculation to obtain the water environment capacity allocation coefficient of each town in the planning level year, which was {8.43%, 13.74%, 13.64%, 11.59%, 9.22%, 8.37%, 7.39%, 8.95%, 8.93%, 9.75%}.

[0128] The COD water environment capacity along the T River in the planning level year is 44283.66t. According to the water environment capacity allocation coefficient of each district and town along the river in the planning level year, the water environment capacity allocation in the planning level year is carried out. The results are shown in Table 5.

[0129] Table 5 Water environment capacity allocation table for each district and town

[0130]

[0131]

[0132] It should be noted that in this implementation case, only the pollutant COD is used as an example for water environment capacity allocation. In fact, the water environment capacity allocation method and indicator system in the present invention can be applied to pollutants including but not limited to COD.

[0133] The water environment capacity allocation method and system applicable to cross-administrative regions provided in this application constructs a water environment capacity allocation method that comprehensively considers multiple indicators such as economic factors, social demographic factors, resources and environmental factors, and proposes an indicator system applicable to cross-administrative region water environment capacity allocation. This method and indicator system are universal, objective, and quantifiable, fully considering the heterogeneity of various regions, and effectively ensuring the economic optimality and fairness of the cross-administrative region water environment capacity allocation plan.

[0134] The protection scope of the water environment capacity allocation method and system applicable to cross-administrative regions described in the embodiment of the present application is not limited to the execution order of the steps listed in the present embodiment. All solutions implemented by adding, reducing or replacing steps in the prior art based on the principles of the present application are included in the protection scope of the present application.

[0135] An embodiment of the present application also provides a water environment capacity allocation system applicable to cross-administrative regions. The water environment capacity allocation system applicable to cross-administrative regions can implement the water environment capacity allocation method applicable to cross-administrative regions described in the present application. However, the implementation device of the water environment capacity allocation method applicable to cross-administrative regions described in the present application includes but is not limited to the structure of the water environment capacity allocation system applicable to cross-administrative regions listed in the present embodiment. All structural deformations and replacements of the prior art made according to the principles of the present application are included in the protection scope of the present application.

[0136] The following will describe in detail the water environment capacity allocation system applicable to cross-administrative regions provided by this embodiment with reference to the diagrams.

[0137] This embodiment provides a water environment capacity allocation system applicable to cross-administrative regions, including:

[0138] See also Figure 7 , which is a schematic diagram of the principle structure of a water environment capacity allocation system applicable to cross-administrative regions in one embodiment of the present application. Figure 7 As shown, the water environment capacity allocation system applicable to cross-administrative regions includes: an acquisition module 71, a water environment capacity calculation module 72, an indicator system construction module 73, an allocation coefficient calculation module 74, and an allocation planning module 75.

[0139] The acquisition module 71 is used to acquire basic data of human and land resources information of each administrative area in the target area.

[0140] In this embodiment, according to the research needs, data such as population, gross national product, water area, length of water functional area, water quality targets of water functional area, and total sewage discharge of each district and town along the river in the current level year and the planned level year are collected.

[0141] Specifically, first determine the specific administrative area where data needs to be obtained; then obtain data through official channels (such as government statistics departments, water conservancy departments, environmental protection departments, etc.) using online data platforms and academic materials; compile and organize the data on the current and planned population, gross national product, water area, length of water functional areas, water quality targets for water functional areas, total pollution discharge, etc. of each district and town along the target river; in order to facilitate the subsequent use of statistical methods and data analysis tools to analyze the collected data.

[0142] The water environment capacity calculation module 72 is connected to the acquisition module 71 and is used to calculate the overall water environment capacity of the rivers in the target area based on the basic data of human and land resources information.

[0143] In this embodiment, the overall water environment capacity of the river is calculated. That is, based on the basic data of human and land resources, the water quality status assessment and pollution trend analysis are carried out to identify the main pollution factors and pollution areas; according to the needs, different water quality functional areas are divided, and the water quality target value of each water quality functional area is set; based on the water quality functional areas and water quality target values, a water environment capacity calculation model is constructed; based on the water quality functional areas and water quality target values, the overall water environment capacity of the river in the target area is calculated based on the water environment capacity calculation model.

[0144] Specifically, first, based on the basic data of human and land resources, the current water quality status assessment and pollution trend analysis are carried out; the current water quality status of the target river is comprehensively assessed to identify the main pollution factors and pollution areas. Then, different water quality functional areas are divided according to the use function and protection objectives of the river; and specific water quality target values ​​are set for each functional area in combination with the actual situation of the river. Next, according to the hydrological conditions, pollutant characteristics and data of the river, a water environment capacity calculation model is constructed to calculate the water environment capacity; and the parameters of the water environment capacity calculation model are determined. Finally, the pollution source information, water quality target values ​​and model parameters are input into the water environment capacity calculation model to perform water quality simulation and prediction, and calculate the overall water environment capacity of the river in the target area under different conditions.

[0145] The indicator system construction module 73 is used to divide the indicators into three levels based on economic factors, social demographic factors, resource and environmental factors and the overall water environment capacity of the river, and establish a sub-indicator system for indicators at each level; the three levels of indicators include: first-level indicators, second-level indicators and third-level indicators.

[0146] In this embodiment, three levels are divided based on economic factors, social demographic factors, and resource and environmental factors, and a sub-indicator system for indicators at each level is established.

[0147] Specifically, the first-level indicators include: water environment capacity allocation indicators based on economic factors; the second-level indicators include: water environment capacity allocation indicators based on socio-demographic factors; the third-level indicators include: water environment capacity allocation indicators based on resource and environmental factors.

[0148] (I) The first level of indicators is the water environment capacity allocation indicator based on economic factors.

[0149] The water environment capacity allocation index based on economic factors is obtained based on the current pollution discharge per unit GDP of each administrative region and the planned annual pollution discharge per unit GDP.

[0150] This allocation index is mainly based on the current pollution discharge per unit GDP of each district and town and the planned annual pollution discharge per unit GDP. Calculate the total pollution discharge per unit GDP of each district and town, the total pollution discharge per unit GDP of each district and town, and calculate the pollution discharge coefficient per unit GDP of each district and town, normalize it, and convert it into a value between 0 and 1. Take a certain weight (obtained by expert meeting method or Delphi method) for the normalized current pollution discharge coefficient per unit GDP and the pollution discharge coefficient per unit GDP of the planned year for weighted calculation to obtain the water environment capacity allocation index based on economic factors for each district and town.

[0151] (II) The second level indicator is the water environment capacity allocation indicator based on social demographic factors

[0152] In this embodiment, a water environment capacity allocation index based on social population factors is established. The water environment capacity allocation index based on social population factors is obtained based on the current total sewage discharge per unit population of each district and town and the planned annual total sewage discharge per unit population.

[0153] Specifically, level 2 is the water environment capacity allocation index based on social demographic factors. This allocation index is mainly based on the current total pollution discharge per unit population of each district and town and the planned annual total pollution discharge per unit population. Calculate the current total pollution discharge per unit population of each district and town, the planned annual total pollution discharge per unit population, and the pollution discharge coefficient per unit population of each district and town, normalize them, and convert them into a value between 0 and 1. Take a certain weight (obtained by the expert meeting method or the Delphi method) for the normalized current pollution discharge coefficient per unit population and the planned annual pollution discharge coefficient per unit population for weighted calculation to obtain the water environment capacity allocation index based on social demographic factors for each district and town.

[0154] (III) The third level indicator is the water environment capacity allocation indicator based on the resources and environmental factors of each town

[0155] In this embodiment, based on the resources and environmental factors of each district and town, and combined with the water area, water functional area length and water quality targets of the water functional area in the basic data of human and land resources information of each administrative area, the water environment capacity allocation index based on the resources and environmental elements of each town is calculated.

[0156] Specifically, establish water environment capacity allocation indicators based on resource and environmental factors of each town. Based on the resource and environmental factors of each district and town, comprehensively consider indicators such as water area, length of water functional area, and water quality targets of water functional area, and calculate water environment capacity allocation indicators based on resource and environmental factors for each district and town.

[0157] In summary, when allocating water environment capacity, this application sets water environment capacity allocation indicators based on economic factors, and from the perspective of economic optimality, promotes the transformation of the industrial structure of each administrative region to promote the trend of reducing the total amount of pollution discharge; at the same time, it sets water environment capacity allocation indicators based on social demographic factors, and from the perspective of fairness in social development, avoids the situation where social development is restricted due to the excessively strict setting of water environment capacity allocation indicators based on economic factors, thereby balancing and ensuring the economic optimality and fairness of the cross-administrative region water environment capacity allocation plan.

[0158] The allocation coefficient calculation module 74 is used to obtain the water environment capacity allocation coefficient of each administrative region in the planning level year based on the sub-indicator system.

[0159] In this embodiment, the relationship between indicators at three levels, namely economic factors, socio-demographic factors, and resource and environmental factors, is established. The weights of sub-indicators at each level are obtained by using the expert meeting method or the Delphi method. Weighted calculations are performed on the weighted indicators to obtain the water environment capacity allocation coefficient for each county in the planning year.

[0160] Specifically, based on the sub-indicator system, the indicator relationship between the three levels is constructed; based on the indicator relationship between the three levels, the weights of the sub-indicators at each level are obtained; and the weights of the sub-indicators are weightedly calculated to obtain the water environment capacity allocation coefficient of each administrative region in the planning level year.

[0161] The allocation planning module 75 is used to allocate the water environment capacity of the planning level year based on the overall water environment capacity of the river and the water environment capacity allocation coefficient of the planning level year of each administrative region.

[0162] The water environment capacity allocation for the planning year is carried out based on the overall water environment capacity of the river and the water environment capacity allocation coefficient for the planning year of each administrative region.

[0163] In this embodiment, the water environment capacity for the planning level year is allocated based on the overall water environment capacity of the river and the water environment capacity allocation coefficient for the planning level year of each district and town along the river.

[0164] The water environment capacity allocation model applicable to cross-administrative regions is applicable to the construction of a water environment capacity allocation system applicable to cross-administrative regions. When allocating water environment capacity, water environment capacity allocation indicators based on economic factors are set. From the perspective of economic optimality, the industrial structure of each administrative region is promoted to change to a trend that promotes the reduction of total pollution discharge. At the same time, water environment capacity allocation indicators based on social demographic factors are set. From the perspective of fairness in social development, the situation in which the water environment capacity allocation indicators based on economic factors are set too strictly and restrict social development is avoided, so that the economic optimality and fairness of the cross-administrative region water environment capacity allocation plan are taken into account and guaranteed. At the same time, the time attribute of the indicator is also taken into account, and the current situation and planning situation are integrated, so that the water environment capacity allocation plan can be adjusted in time according to the planning situation, which provides new ideas for water environment capacity management and allocation.

[0165] It should be noted that it should be understood that the division of the various modules of the above system is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; some modules can also be implemented in the form of software called by processing elements, and some modules can be implemented in the form of hardware. For example, the x module can be a separately established processing element, or it can be integrated in a certain chip of the above system for implementation. In addition, it can also be stored in the memory of the above system in the form of program code, and called and executed by a certain processing element of the above system. The implementation of other modules is similar. In addition, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element described here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.

[0166] In summary, the present application provides a method and system for allocating water environment capacity across administrative regions, which has the following beneficial effects:

[0167] (1) The water environment capacity allocation method applicable to cross-administrative regions provided in this application and the indicator system fully consider the heterogeneous characteristics of economic factors, social demographic factors, resources and environmental factors in each administrative region, and the indicators are universal, objective and quantifiable, which helps to improve the scientificity and operability of the water environment capacity allocation method and overcome the shortcomings of previous capacity allocation schemes that mainly rely on human decision-making;

[0168] (2) When allocating water environment capacity, this application sets water environment capacity allocation indicators based on economic factors, and promotes the transformation of the industrial structure of each administrative region to promote the reduction of total pollution discharge from the perspective of economic optimization; at the same time, it sets water environment capacity allocation indicators based on social demographic factors, and avoids the situation where the water environment capacity allocation indicators based on economic factors are too strict and restrict social development from the perspective of fairness of social development, so as to balance the economic optimality and fairness of the cross-administrative region water environment capacity allocation plan;

[0169] (3) This application takes into account the temporal attributes of the indicators and integrates the current situation with the planned situation, so as to facilitate timely adjustment of the water environment capacity allocation plan in accordance with the planned situation, and provides new ideas for the management and allocation of water environment capacity.

[0170] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A method for allocating water environment capacity across administrative regions, characterized in that: The following steps are involved: Obtain basic data on human and land resources in each administrative area within the target area; Calculate the overall water environment capacity of rivers in the target area based on the basic data of human and land resources; Based on economic factors, social demographic factors, resource and environmental factors and the overall water environment capacity of the river, three levels of indicators are divided, and a sub-indicator system for each level of indicators is established; the three levels of indicators include: first level indicators, second level indicators and third level indicators; Based on the sub-indicator system, the water environment capacity allocation coefficient of each administrative region in the planning level year is obtained; The water environment capacity allocation for the planning year is carried out based on the overall water environment capacity of the river and the water environment capacity allocation coefficient for the planning year of each administrative region.

2. The method for allocating water environment capacity across administrative regions according to claim 1, characterized in that: The basic data of human and land resources information of each administrative region include: any one or more combinations of the population, gross national product, water area, length of water functional area, water quality targets of water functional area, and sewage problems of each administrative region in the current level year and the planned level year.

3. The water environment capacity allocation method applicable to cross-administrative regions according to claim 1 is characterized in that: The first-level indicators include: water environment capacity allocation indicators based on economic factors; the second-level indicators include: water environment capacity allocation indicators based on social and demographic factors; the third-level indicators include: water environment capacity allocation indicators based on resource and environmental factors.

4. The method for allocating water environment capacity across administrative regions according to claim 3 is characterized in that: The establishment of the water environment capacity allocation index based on economic factors includes the following steps: The water environment capacity allocation index based on economic factors is obtained based on the current pollution discharge per unit GDP of each administrative area and the planned annual pollution discharge per unit GDP; including: Based on the basic data of human and land resources in each administrative region, the total pollution discharge per unit GDP of each district and town, the total pollution discharge per unit GDP in the planned level year, and the pollution discharge coefficient per unit GDP of each district and town in the current and planned level year were calculated respectively; Normalize and convert the pollution emission coefficient per unit GDP of each district and town to obtain the normalized current pollution emission coefficient per unit GDP of each district and town and the normalized planned annual pollution emission coefficient per unit GDP of each district and town; The normalized current pollution discharge coefficient per unit GDP of each district and town and the normalized planned annual pollution discharge coefficient per unit GDP of each district and town are weighted to obtain the water environment capacity allocation index based on economic factors for each district and town.

5. The method for allocating water environment capacity across administrative regions according to claim 4 is characterized in that: The calculation formula of the water environment capacity allocation index based on economic factors is: include: Among them, GN j Indicates the current pollution discharge per unit GDP of town in district j, unit: t / 100 million yuan; CN j Indicates the current pollutant emissions of the town in district j, unit: t; GDPN j Indicates the current annual gross national product of the town in district j, unit: 100 million yuan; DN j It represents the pollution emission coefficient per unit GDP of the j district town; GF represents the normalized current pollution emission coefficient per unit GDP of town j; j Indicates the annual unit GDP pollution discharge of the planned town in the j district, unit: t / 100 million yuan; CF j Indicates the annual pollutant emissions of the planned town in j district, unit: t; GDPF j Indicates the annual gross national product of the planned town in district j, unit: 100 million yuan; DF j It represents the pollution emission coefficient per unit GDP in the planning level of the j district town; represents the normalized planning level annual unit GDP pollution discharge coefficient of the j district town; D j It represents the water environment capacity allocation index of the j district town based on economic factors; α represents the weight of the current unit GDP pollution discharge coefficient.

6. The method for allocating water environment capacity across administrative regions according to claim 3 is characterized in that: The water environment capacity allocation indicator based on socio-demographic factors includes the following steps: Based on the current total amount of sewage discharged per unit population in each district and town and the planned annual total amount of sewage discharged per unit population, the water environment capacity allocation index based on social population factors is obtained; including: Based on the current total pollution discharge per unit population of each district and town and the total pollution discharge per unit population in the planned level year, calculate the current total pollution discharge per unit population of each district and town, the total pollution discharge per unit population in the planned level year, and the pollution discharge coefficient per unit population of each district and town in the current and planned level year; Normalizing the pollution discharge coefficient per unit population of each district and town to obtain the normalized current pollution discharge coefficient per unit population of each district and town and the normalized planned annual pollution discharge coefficient per unit population of each district and town; The water environment capacity allocation index based on social demographic factors is obtained by weighted calculation based on the normalized current unit population pollution discharge coefficient of each district and town and the normalized planned level annual unit population pollution discharge coefficient of each district and town.

7. The method for allocating water environment capacity across administrative regions according to claim 6, characterized in that: The water environment capacity allocation indicator based on socio-demographic factors includes the following steps: The calculation formula for the water environment capacity allocation index based on social demographic factors is: include: Among them, PN j Indicates the current unit population sewage discharge of j district town, unit: t / 10,000 people; CN j Indicates the current pollutant emissions in the j district town, unit: t; POPN j VN represents the current annual population of the town in district j, in ten thousand people; j represents the current unit population pollution coefficient of the town in district j, PF represents the normalized current unit population pollution coefficient of the j district town; j Indicates the annual per capita sewage discharge of the planned town in the j district, unit: t / 10,000 people; CF j Indicates the annual pollutant emissions of the planned town in j district, unit: t; POPF j VF represents the planned annual population of the town in the j district, unit: 10,000 people; j It represents the annual unit population pollution discharge coefficient of the planned level of the j district town; V represents the normalized planning level annual unit population pollution coefficient of the j district town; j It represents the water environment capacity allocation index of the j district town based on social demographic factors; β represents the weight of the current unit population pollution discharge coefficient.

8. The method for allocating water environment capacity across administrative regions according to claim 3 is characterized in that: Based on the resource and environmental factors of each district and town, and in combination with the water area, length of water functional area and water quality target of water functional area in the basic data of human and land resources of each administrative area, the water environment capacity allocation index based on the resource and environmental factors of each town is calculated; The calculation formula for the water environment capacity allocation index based on the resources and environmental elements of each town is: Among them, K j represents the water environment capacity allocation index of the j district town based on the resources and environmental factors of each town; l ij represents the length of the water function zone with water quality target in town i of district j; C i Indicates the target concentration limit of water quality; S j represents the water area of ​​the town in district j; l j represents the length of the target water functional area of ​​district j; n represents the number of districts and towns.

9. The method for allocating water environment capacity across administrative regions according to claim 1, characterized in that: Obtaining the water environment capacity allocation coefficient for each administrative region in the planning level year based on the sub-indicator system includes the following steps: Construct the indicator relationship between the three levels based on the sub-indicator system; Obtain the weight of the sub-item indicators at each level based on the indicator relationship between the three levels; The weights of the sub-items are weighted and calculated to obtain the water environment capacity allocation coefficient for each administrative region in the planning level year; The calculation formula for the water environment capacity allocation coefficient of each administrative region in the planning level year is: WEC j =D j ·η+V j ·x+K j ·d (16) η+χ+δ=1 (17) Among them, WEC j represents the water environment capacity allocation coefficient of the j-district town in the horizontal planning year; D j V represents the water environment capacity allocation index of the town in district j based on economic factors; j K represents the water environment capacity allocation index of town j based on social demographic factors; j represents the water environment capacity allocation index of district j based on resource and environmental factors; η represents the sub-item weight of water environment capacity allocation index of district j based on economic factors; χ represents the sub-item weight of water environment capacity allocation index of district j based on social and demographic factors; δ represents the sub-item weight of water environment capacity allocation index of district j based on resource and environmental factors.

10. A water environment capacity allocation system applicable to cross-administrative regions, characterized in that: include: The acquisition module is used to obtain the basic data of human and land resources information of each administrative area in the target area; A water environment capacity calculation module, used to calculate the overall water environment capacity of rivers in the target area based on the basic data of human and land resources information; An indicator system construction module is used to divide the indicators into three levels based on economic factors, social demographic factors, resource and environmental factors and the overall water environment capacity of the river, and establish a sub-indicator system for the indicators at each level; the three levels of indicators include: first-level indicators, second-level indicators and third-level indicators; A distribution coefficient calculation module, used to obtain the water environment capacity distribution coefficient of each administrative region in the planning level year based on the sub-indicator system; The allocation planning module is used to allocate the water environment capacity of the planning level year based on the overall water environment capacity of the river and the water environment capacity allocation coefficient of the planning level year of each administrative region.

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