Method and device for measuring comprehensive carrying capacity of water resources environment applicable to urban areas

Abstract

The present invention relates to the technical field of the carrying capacity of the social hydrological water system, and discloses a method and device for measuring the comprehensive carrying capacity of the water resources environment applicable to urban areas. The method includes: obtaining water resources element data, water environment element data, and social and economic element data; respectively determining a water resources carrying capacity evaluation model and a water environment carrying capacity evaluation model based on the water resources element data and the water environment element data; fitting a human-water interaction relationship equation set based on the water resources element data, the water environment element data, and the social and economic element data; and solving the comprehensive carrying capacity result of the water resources environment based on the water resources carrying capacity evaluation model, the water environment carrying capacity evaluation model, and the human-water interaction relationship equation set. Based on the human-water interaction relationship, the present invention integrates two dimensions of water quantity and water quality, and can quantitatively solve the comprehensive carrying capacity result of the water resources environment, providing an objective scientific support for guiding the water resources management and water environment protection in urban areas.

Description

Technical Field

[0001] The present invention relates to the technical field of social hydrology water system carrying capacity, and in particular to a method and device for measuring the comprehensive carrying capacity of water resources environment suitable for urban areas. Background Art

[0002] The continuous interaction between humans and nature has led to a closer coupling between humans and water, and the relationship between humans and water has become more complicated. The current rapid urbanization process has led to rapid social and economic development, increased population density, and aggravated hardening of the underlying surface, resulting in a sharp increase in the development and utilization of water resources, which has further significantly affected the urban water cycle and water environment at different time and space scales. However, as economic development enters the in-depth stage and urbanization becomes more mature, the contradiction between economic growth and water resources and environment has become increasingly acute, the regional scarcity of water resources has become prominent, and a series of water environment problems such as urban black and smelly water bodies and urban non-point source pollution have occurred frequently. Water resource overload is a key issue that needs to be urgently addressed in the current urbanization process, which threatens the sustainable development of urban social economy.

[0003] Carrying capacity is a yardstick for effectively solving urban resource and environmental problems and guiding urban sustainable development. Human society urgently needs to explore the sustainable state of water resource development and utilization through the study of carrying capacity. The original concept of carrying capacity is used to describe the ability of a carrier to support its carrying capacity. Previously, some scholars proposed the concept of "resource carrying capacity", which refers to the population that can be maintained indefinitely at a given living standard within the foreseeable period. Later, some scholars proposed the concept of water resource carrying capacity, which refers to the maximum capacity of water resources in a certain area to carry industry, agriculture, urban scale and population without destroying the social and ecological systems at a certain stage of social history and scientific and technological development. Since then, many scholars have successively proposed definitions for water resource carrying capacity. Although no consensus has been reached, these definitions reflect the connotation of water resource carrying capacity to a certain extent. However, if the water resource carrying capacity does not take into account the relationship between the carrier and the carrying capacity, the assessment of carrying capacity will become empty and inaccurate.

[0004] Traditional carrying capacity assessments generally rely on multi - indicator assessment models, such as the entropy weight method, the analytic hierarchy process, the fuzzy comprehensive evaluation method, the principal component analysis method, the pressure - state - response model, etc., to calculate the carrying capacity index and determine whether water resources are over - utilized. The above - mentioned methods based on mathematical statistics obscure the concept of carrying capacity, do not consider the coupling effect between influencing factors, and it is difficult to determine the interaction between the involved elements and the dynamic change process of the carrying capacity. As a result, there is a lack of accurate identification of the maximum socio - economic scale that urban water resources can support. With the in - depth research, existing studies pay more attention to considering the mutual feedback effect between various factors affecting water resources carrying capacity, and quantitatively calculate the water resources carrying capacity through mathematical equations or models, including the ecological footprint method, the projection pursuit method, the system dynamics method, etc. These methods still have certain limitations in establishing a relatively reasonable and quantitative assessment equation and model for water resources carrying capacity. Under the current urbanization background, the development and utilization of water resources involve increasingly complex human - water relationships, exacerbating the challenges of solving the problem of water resources carrying capacity. The city, as a spatial carrier of frequent human activities, is a key node for the interaction between natural background conditions and socio - economic elements. However, there are still deficiencies in the current research on water resources carrying capacity for urban areas that fully consider the human - water mutual feedback relationship, and it is difficult to reasonably quantify the urban economic development threshold that water resources can support. Summary of the Invention

[0005] In view of this, the present invention provides a method and device for measuring the comprehensive carrying capacity of water resources environment applicable to urban areas to solve the problem of difficultly and reasonably quantifying the water resources carrying threshold.

[0006] In the first aspect, the present invention provides a method for measuring the comprehensive carrying capacity of water resources environment applicable to urban areas, and the method includes:

[0007] Obtain water resource element data, water environment element data, and socio - economic element data;

[0008] Based on the water resource element data and the water environment element data, respectively determine the water resources carrying capacity assessment model and the water environment carrying capacity assessment model;

[0009] Based on the water resource element data, the water environment element data, and the socio - economic element data, fit to obtain the human - water mutual feedback relationship equations;

[0010] Based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model, and the human - water mutual feedback relationship equations, solve the result of the comprehensive carrying capacity of water resources environment.

[0011] The comprehensive carrying capacity measurement method of water resources environment applicable to urban areas provided by the present invention determines a water resources carrying capacity evaluation model based on water resources element data, and determines a water environment carrying capacity evaluation model based on water environment element data; fits a human-water interaction relationship equation set based on water resources element data, water environment element data and social and economic element data; constructs a comprehensive carrying capacity measurement model of water resources environment based on the water resources carrying capacity evaluation model, the water environment carrying capacity evaluation model and the human-water interaction relationship equation set, and solves the comprehensive carrying capacity result of water resources environment based on the comprehensive carrying capacity measurement model of water resources environment. Based on the human-water interaction relationship, the present invention integrates two dimensions of water resources and water environment, and can quantitatively solve the comprehensive carrying capacity result of water resources environment in the research area, that is, the maximum population quantity that can be carried and the scale of gross domestic product (GDP), solves the problem that it is difficult to reasonably quantify the carrying threshold of water resources, and can provide relatively objective scientific support for guiding water resources management and water environment protection in urban areas.

[0012] In an alternative embodiment, determining the water resources carrying capacity evaluation model and the water environment carrying capacity evaluation model based on the water resources element data and the water environment element data respectively includes:

[0013] Determining the water resources carrying capacity evaluation model based on the water resources element data;

[0014] Determining the water environment carrying capacity evaluation model based on the water environment element data.

[0015] The comprehensive carrying capacity measurement method of water resources environment applicable to urban areas provided by the present invention determines the water resources carrying capacity evaluation model based on the water resources element data; determines the water environment carrying capacity evaluation model based on the water environment element data, realizes the purpose of quantitatively evaluating the water resources carrying capacity and the water environment carrying capacity respectively by constructing a mathematical calculation method, and provides conditions for jointly constructing a comprehensive carrying capacity measurement model of water resources environment based on the human-water interaction relationship equation set with the subsequent human-water interaction relationship equation set.

[0016] In an alternative embodiment, the water resources element data includes surface water resources quantity, groundwater resources quantity, available transit water quantity, production water consumption, domestic water consumption and ecological water consumption;

[0017] Determining the water resources carrying capacity evaluation model based on the water resources element data includes:

[0018] Obtaining the surface water resources quantity, groundwater resources quantity, available transit water quantity, production water consumption, domestic water consumption and ecological water consumption from the water resources element data;

[0019] Determining the actual water consumption based on the production water consumption, domestic water consumption and ecological water consumption;

[0020] Determine the wastewater reuse amount based on the actual water consumption and the preset reuse rate;

[0021] Determine the available local water resources based on the surface water resources and the groundwater resources;

[0022] Determine the total available water resources based on the available local water resources, the available cross-border water volume, and the wastewater reuse amount;

[0023] Determine the water resources carrying capacity assessment model based on the actual water consumption and the total available water resources.

[0024] The comprehensive water resources environment carrying capacity measurement method applicable to urban areas provided by the present invention analyzes and evaluates the evolution status of the water resources carrying capacity through the water resources carrying capacity assessment model. Finally, the water resources carrying capacity assessment model is converted into a process of solving the total available water resources and the actual water consumption, and making a quantitative comparison, numericalizing the water resources carrying capacity. The water resources carrying capacity assessment model is simple to calculate, providing a basis for subsequent calculation of the comprehensive carrying capacity index of the water system.

[0025] In an alternative embodiment, the water environment element data includes the sewage discharge load of residents' production and living, the pollution load of rivers entering the territory, the external transferred water pollution load, the non-point source pollution load, the natural degradation amount of pollutants, the sewage treatment reduction amount, the flow of the outflow water body, and the local water quality standard; the sewage discharge load of residents' production and living, the pollution load of rivers entering the territory, and the external transferred water pollution load are all calculated from the flow rate, concentration data, and sewage discharge time;

[0026] Determining the water environment carrying capacity assessment model based on the water environment element data includes:

[0027] Construct a water environment dynamics model applicable to urban areas based on the sewage discharge load of residents' production and living, the pollution load of rivers entering the territory, the external transferred water pollution load, the non-point source pollution load, the natural degradation amount of pollutants, the sewage treatment reduction amount, the mass conservation, and the hydrodynamics theory;

[0028] Calculate the allowable load based on the water environment dynamics model, the flow of the outflow water body within a preset time period, and the local water quality standard; take the sewage discharge load of residents' production and living as the total actual sewage discharge load;

[0029] Determine the water environment carrying capacity assessment model based on the allowable load and the total actual sewage discharge load.

[0030] In an alternative embodiment, calculating the allowable load based on the water environment dynamics model, the flow of the outflow water body within a preset time period, and the local water quality standard includes:

[0031] Calculate the maximum limit value of the pollution load of the outflow water body based on the flow of the outflow water body within a preset time period and the local water quality standard;

[0032] Determine the allowable load based on the water environment dynamics model, the maximum limit value of the pollution load of the discharged water body, other water pollution sources except the pollution load of residents' production and living sewage, and the reduction load.

[0033] The method for measuring the comprehensive carrying capacity of water resources applicable to urban areas provided by the present invention converts the water environment carrying capacity evaluation model determined based on water environment element data into a process of solving the allowable load and the total actual sewage discharge load, and making a quantitative comparison, numericalizes the water environment carrying capacity, considers that the water pollutants in the urban area mainly come from the sewage discharge of residents' production and living, river inflow, river outflow, non-point source pollution generation, external transferred water pollution, etc., and also considers the gradual reduction of the pollution load through processes such as artificial sewage treatment and natural degradation, improving the calculation accuracy of the water environment carrying capacity.

[0034] In an optional implementation manner, the water resource element data further includes precipitation, the production water consumption includes the production water consumption of the primary industry, the production water consumption of the secondary industry, and the production water consumption of the tertiary industry, and the domestic water consumption includes the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, and the per capita domestic water consumption of rural residents; the social and economic element data includes the permanent population quantity, the urbanization rate, the gross domestic product of each industry, and the value of high-tech industries;

[0035] The human-water interaction relationship equations include the first human-water interaction relationship equations;

[0036] The human-water interaction relationship equations fitted based on the water resource element data, the water environment element data, and the social and economic element data include:

[0037] The first human-water interaction relationship equations are fitted based on precipitation, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, the per capita domestic water consumption of rural residents, the permanent population quantity, the urbanization rate, the gross domestic product of each industry, and the value of high-tech industries.

[0038] In an optional implementation manner, the water environment element data further includes the sewage discharge of residents' production and living, the sewage discharge of urban residents, the sewage discharge coefficient of urban residents, the sewage discharge of the secondary industry, the sewage discharge of the tertiary industry, the sewage discharge coefficient of the secondary and tertiary industries, the sewage discharge concentration, the sewage treatment reduction load, the discharge concentration after sewage treatment, and the non-point source pollution load;

[0039] The social and economic element data further includes the built-up area at the end of the year; the gross domestic product of each industry includes the gross domestic product of the primary industry;

[0040] The human-water interaction relationship equations further include the second human-water interaction relationship equations;

[0041] The system of equations for the human-water interaction relationship obtained by fitting based on water resource element data, water environment element data, and socioeconomic element data further includes:

[0042] A second system of equations for the human-water interaction relationship is obtained by fitting based on the domestic sewage discharge volume of residents' production and living, the domestic sewage discharge volume of urban residents, the domestic sewage discharge coefficient of urban residents, the production sewage discharge volume of the secondary industry, the production sewage discharge volume of the tertiary industry, the sewage discharge coefficient of the secondary and tertiary industries, the sewage discharge concentration, the sewage treatment reduction load, the discharge concentration of sewage after treatment, the non-point source pollution load, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the permanent population, the urbanization rate, the gross domestic product of the primary industry, the value of high-tech industries, and the built-up area at the end of the year.

[0043] The method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas provided by the present invention obtains a first system of equations for the human-water interaction relationship by fitting based on water resource element data and socioeconomic element data; a second system of equations for the human-water interaction relationship is obtained by fitting based on water environment element data, water resource element data, and socioeconomic element data. Starting from the human-water interaction relationship, the first system of equations for the human-water interaction relationship and the second system of equations for the human-water interaction relationship suitable for the water resources and environment of urban areas are determined, providing conditions for subsequent solving of the results of the comprehensive carrying capacity of water resources and environment.

[0044] In an optional implementation manner, solving the comprehensive carrying capacity result of water resources and environment based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model, and the system of equations for the human-water interaction relationship includes:

[0045] Solving the water resources-carrying population and gross domestic product in a preset period based on the water resources carrying capacity assessment model and the first system of equations for the human-water interaction relationship;

[0046] Solving the water environment-carrying population and gross domestic product in a preset period based on the water environment carrying capacity assessment model and the second system of equations for the human-water interaction relationship;

[0047] Based on the barrel principle, the smaller value of the water resources-carrying population and gross domestic product in a preset period and the water environment-carrying population and gross domestic product in the corresponding period is selected as the result of the comprehensive carrying capacity of water resources and environment.

[0048] The comprehensive carrying capacity measurement method of water resources environment applicable to urban areas provided by the present invention is based on a water resources carrying capacity evaluation model and a first human-water interaction relationship equation set to solve the water resources-carrying population and gross domestic product (GDP) in a preset period; based on a water environment carrying capacity evaluation model and a second human-water interaction relationship equation set to solve the water environment-carrying population and GDP in a preset period; and based on the bucket principle, select the smaller value of the water resources-carrying population and GDP in a preset period and the water environment-carrying population and GDP in the corresponding period as the result of the comprehensive carrying capacity of water resources environment, realizing the calculation of the water environment carrying capacity threshold, and providing an objective scientific support for guiding water resources management and water environment protection in urban areas.

[0049] In a second aspect, the present invention provides a comprehensive carrying capacity measurement device for water resources environment applicable to urban areas, the device comprising:

[0050] A data acquisition module, configured to acquire water resources element data, water environment element data, and socioeconomic element data;

[0051] A carrying capacity evaluation model determination module, configured to determine a water resources carrying capacity evaluation model based on the water resources element data, and determine a water environment carrying capacity evaluation model based on the water environment element data;

[0052] A human-water interaction relationship fitting module, configured to fit a human-water interaction relationship equation set based on the water resources element data, the water environment element data, and the socioeconomic element data;

[0053] A comprehensive carrying capacity measurement module, configured to solve the result of the comprehensive carrying capacity of water resources environment based on the water resources carrying capacity evaluation model, the water environment carrying capacity evaluation model, and the human-water interaction relationship equation set.

[0054] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, which are communicatively connected to each other, wherein the memory stores computer instructions, and the processor executes the computer instructions to execute the comprehensive carrying capacity measurement method of water resources environment applicable to urban areas in the first aspect or any corresponding embodiment thereof.

[0055] In a fourth aspect, the present invention provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to cause a computer to execute the comprehensive carrying capacity measurement method of water resources environment applicable to urban areas in the first aspect or any corresponding embodiment thereof. Description of the Drawings

[0056] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0057] Figure 1 is a schematic flowchart of a method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention;

[0058] Figure 2 is a schematic flowchart of another method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention;

[0059] Figure 3 is a schematic flowchart of yet another method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention;

[0060] Figure 4 is a schematic flowchart of still another method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention;

[0061] Figure 5 is a comparison chart of the population that can be supported and the actual population of the water resources carrying capacity in the research area according to an embodiment of the present invention;

[0062] Figure 6 is a comparison chart of the population that can be supported and the actual population of the water environment carrying capacity in the research area according to an embodiment of the present invention;

[0063] Figure 7 is a comparison chart of the GDP that can be supported and the actual GDP of the water resources carrying capacity in the research area according to an embodiment of the present invention;

[0064] Figure 8 is a comparison chart of the GDP that can be supported and the actual GDP of the water environment carrying capacity in the research area according to an embodiment of the present invention;

[0065] Figure 9 is a comparison chart of the population that can be supported and the actual population of the comprehensive carrying capacity of water resources and environment in the research area according to an embodiment of the present invention;

[0066] Figure 10 is a comparison chart of the GDP that can be supported and the actual GDP of the comprehensive carrying capacity of water resources and environment in the research area according to an embodiment of the present invention;

[0067] Figure 11 is a structural block diagram of a device for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention;

[0068] Figure 12 It is a schematic diagram of the hardware structure of the computer device according to an embodiment of the present invention. Specific implementation manners

[0069] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0070] According to an embodiment of the present invention, an embodiment of a method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0071] In this embodiment, a method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas is provided, which can be used in computers, servers Figure 1 It is a flowchart of a method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention, as Figure 1 shown, and the process includes the following steps:

[0072] Step S101, obtain water resource element data, water environment element data and socioeconomic element data.

[0073] Specifically, collect the data of water resource elements, water environment elements, and social and economic elements in the target study area during the study period. Among them, the data of water resource elements include relevant data such as precipitation, surface water resource volume, groundwater resource volume, total water resource volume, production water consumption of each industry (primary, secondary, and tertiary industries), domestic water consumption of urban and rural residents, ecological water consumption, recycling rate, and incoming water volume; the data of water environment elements include relevant data such as sewage discharge from residents' production and life, pollution from rivers entering the area, pollution of water transferred from outside, natural degradation volume of pollutants, reduction volume of sewage treatment, flow of the effluent water body, and local water quality standards; the data of social and economic elements include relevant data such as the number of permanent residents, urbanization rate, gross domestic product (GDP) of each industry (primary, secondary, and tertiary industries), output value of high-tech industries, etc. The gross domestic product of each industry includes the gross domestic product of the primary industry, the gross domestic product of the secondary industry, and the gross domestic product of the tertiary industry. The gross domestic product is the sum of the gross domestic products of each industry, that is, the sum of the gross domestic product of the primary industry, the gross domestic product of the secondary industry, and the gross domestic product of the tertiary industry.

[0074] The non-point source pollution load is calculated using the Export Coefficient Model (ECM model), and the calculation formula is as follows:

[0075]

[0076] Among them, L npoint is the non-point source pollution load, including the load amount of non-point source pollutants; E k is the export coefficient of the kth type of pollution source; A k is the quantity of the kth type of pollution source; l is the number of pollution source types; PI is the quantity of nutrients input by rainfall.

[0077] Step S102, determine the water resource carrying capacity assessment model and the water environment carrying capacity assessment model based on the water resource element data and the water environment element data respectively.

[0078] Specifically, water resources carrying capacity refers to the ability of the water resources in the target research basin or region to continuously support the scale of economic and social development and maintain a good ecosystem. That is, whether the total available water resources calculated from the precipitation, surface water resources, groundwater resources, incoming water volume, water consumption, and reuse rate in the water resources element data can support the production water consumption of various industries (primary industry, secondary industry, and tertiary industry), the domestic water consumption of urban and rural residents, and the ecological water consumption. Therefore, the water resources carrying capacity can be evaluated by solving the total available water resources and the actual water consumption. Water environment carrying capacity refers to the maximum capacity of the water body in the target research basin or region to accommodate sewage and pollutants when it can be continuously used and maintain a good ecosystem. That is, whether the maximum carrying capacity of the urban area calculated from the non-point source pollution load, river incoming pollution load, external transferred water pollution load, natural degradation amount of pollutants, sewage treatment reduction amount, outflow water body flow, and local water quality standards in the water environment element data can accommodate the total actual sewage discharge load of residents' production and life. Therefore, the water environment carrying capacity can be evaluated by solving the accommodable load and the actual sewage discharge load.

[0079] Step S103: Fit the human-water interaction relationship equations based on the water resources element data, water environment element data, and social and economic element data.

[0080] Specifically, the human-water interaction relationship includes: the regional human water demand causes water resources shortage, and the water pollution substances generated in the process of human production and life increase the vulnerability of the regional water resources supply and water environment protection. An appropriate binary or multiple regression equation can be selected and the human-water interaction relationship equations can be fitted according to the water resources element data, water environment element data, and social and economic element data.

[0081] Step S104: Solve the results of the comprehensive water resources and environment carrying capacity based on the water resources carrying capacity evaluation model, water environment carrying capacity evaluation model, and human-water interaction relationship equations.

[0082] Specifically, based on the human-water interaction relationship equations, combined with the water resources carrying capacity evaluation model and the water environment carrying capacity evaluation model, integrating the two dimensions of water quantity and water quality, a measurement model for the comprehensive water resources and environment carrying capacity is constructed to quantitatively solve the maximum population quantity and GDP scale that can be carried by the comprehensive water resources and environment carrying capacity in the research area.

[0083] The method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas provided in this embodiment determines a water resources carrying capacity evaluation model based on water resources element data, and determines a water environment carrying capacity evaluation model based on water environment element data; a human-water interaction relationship equation set is fitted based on water resources element data, water environment element data and social and economic element data; a comprehensive measurement model of water resources and environment carrying capacity is constructed by combining the water resources carrying capacity evaluation model, the water environment carrying capacity evaluation model and the human-water interaction relationship equation set, which can quantitatively solve the comprehensive carrying capacity result of water resources and environment based on the human-water interaction relationship, integrating two dimensions of water quantity and water quality in the research area, that is, the maximum population quantity and GDP scale that can be carried, solving the problem of difficult to reasonably quantify the carrying threshold of the comprehensive carrying capacity of water resources and environment, and providing an objective scientific support for guiding water resources management and water environment protection in urban areas.

[0084] In this embodiment, a method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas is provided, which can be used in computers, servers, etc. Figure 2 It is a flowchart of the method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention, as Figure 2 shown, and this process includes the following steps:

[0085] Step S201, obtain water resources element data, water environment element data and social and economic element data. For details, please refer to Figure 1 Step S101 of the embodiment shown, which will not be elaborated here.

[0086] Step S202, respectively determine a water resources carrying capacity evaluation model and a water environment carrying capacity evaluation model based on water resources element data and water environment element data.

[0087] Specifically, the above step S202 includes:

[0088] Step S2021, determine a water resources carrying capacity evaluation model based on water resources element data.

[0089] In some alternative implementation manners, the water resources element data includes surface water resources quantity, groundwater resources quantity, available transit water quantity, production water consumption, domestic water consumption and ecological water consumption; the above step S2021 includes:

[0090] Step a1, obtain surface water resources quantity, groundwater resources quantity, available transit water quantity, production water consumption, domestic water consumption and ecological water consumption from the water resources element data.

[0091] Step a2, determine the actual water consumption based on production water consumption, domestic water consumption and ecological water consumption. Specifically, the formula for determining the actual water consumption based on production water consumption, domestic water consumption and ecological water consumption is as follows:

[0092] W use = W industry + W domestic + W ecological (2);

[0093] W industry = W primary + W secondary + W tertiary (3);

[0094] W domestic = WC domestic + WR domestic (4);

[0095] Where: W use represents the actual water consumption; W industry , W domestic , W ecological are the production water consumption, domestic water consumption, and ecological water consumption respectively, with the unit of 100 million m 3 ; W primary , W secondary , W tertiary are the production water consumptions of the primary, secondary, and tertiary industries respectively, with the unit of 100 million m 3 ; WC domestic , WR domestic are the domestic water consumptions of urban residents and rural residents respectively, with the unit of 100 million m 3 .

[0096] Step a3, determine the wastewater reuse amount based on the actual water consumption and the preset reuse rate.

[0097] Specifically, the wastewater reuse amount W use is calculated by multiplying the actual water consumption W ruse by the reuse rate rw.

[0098] Step a4, determine the available local water resources amount based on the surface water resources amount and the groundwater resources amount.

[0099] Specifically, the available local water resources amount W surface is obtained by multiplying the surface water resources amount W ground and the groundwater resources amount W local by the corresponding empirical coefficients.

[0100] Step a5, determine the total available water resources amount based on the total available local water resources amount, the available transit water amount, and the wastewater reuse amount.

[0101] Specifically, the formula for calculating the total available water resources amount is as follows:

[0102]

[0103] Among them, the total available water resources W capacity consist of the locally available water resources W local , the available cross-border water volume W transit and the reused wastewater volume W ruse ; W transit represents the available cross-border water volume obtained by summarizing and sorting out the water intake permits in the study area according to the Ministry of Water Resources. The total available water resources can also be the total amount of available water resources = total water resources * available utilization rate.

[0104] Step a6, determine the water resources carrying capacity assessment model based on the actual water consumption and the total available water resources.

[0105] Specifically, compare and analyze the total available water resources W capacity and the actual water consumption W use over the years to obtain the evolution status of the regional water resources carrying capacity and evaluate the water resources carrying capacity.

[0106] The method for measuring the comprehensive water environment carrying capacity applicable to urban areas provided in this embodiment analyzes and evaluates the evolution status of the water resources carrying capacity through the water resources carrying capacity assessment model. Finally, the evaluation of the water resources carrying capacity is converted into the process of solving and comparing the total available water resources and the actual water consumption, numericalizing the water resources carrying capacity index. The calculation of the water resources carrying capacity assessment model is simple, providing a basis for the subsequent calculation of the comprehensive water system carrying capacity index.

[0107] Step S2022, determine the water environment carrying capacity assessment model based on the water environment element data.

[0108] Specifically, the water environment element data includes the sewage discharge load of residents' production and living, the pollution load of rivers entering the territory, the water pollution load of external water transfers, the natural degradation amount of pollutants, the sewage treatment reduction amount, the flow of the outflow water body, and the local water quality standard. The load data such as the sewage discharge load of residents' production and living, the pollution load of rivers entering the territory, and the water pollution load of external water transfers are all calculated from the flow, concentration data, and sewage discharge time; the above step S2022 includes:

[0109] Step b1, construct a water environment dynamics model applicable to urban areas based on the sewage discharge load of residents' production and living, the pollution load of rivers entering the territory, the water pollution load of external water transfers, the non-point source pollution load, the natural degradation amount of pollutants, the sewage treatment reduction amount, the mass conservation, and the hydrodynamics theory.

[0110] Specifically, in this embodiment, taking the entire city as an example, the entire city is generalized as a water tank, ignoring the exchange of water pollution substances generated by water body overflows, seepages, etc. with surrounding cities, and considering that the water pollution substances in the urban area mainly come from domestic sewage discharge from residents' production and living, river inflows, river outflows, non-point source pollution generation, external water transfer pollution, etc. At the same time, the reduction of pollution load through artificial sewage treatment and natural degradation processes is also considered. Based on the principle of mass conservation and hydrodynamics theory, the present invention proposes a water environment dynamics model for the water environment carrying capacity suitable for urban areas, and the formula is as follows:

[0111]

[0112] Among them, Q is the flow rate of the urban effluent water body; C is the pollutant concentration of the urban effluent water body; t is time; V is the total amount of water resources in the city (total amount of water resources = surface water resources volume W surface + groundwater resources volume W ground - duplicate calculation amount, and the total available water resources can also be the total amount of available water resources = total amount of water resources * availability rate); Q i 、C i (i = 1, 2,..., n) are the flow rates and concentrations corresponding to each water pollution source item such as domestic sewage discharge from residents' production (including secondary and tertiary industries) and living, non-point source pollution generation, river inflows, external water transfer pollution, etc.; Q j 、C j (j = n + 1, 2,..., m) are the flow rates and concentrations corresponding to each water pollution reduction item such as sewage treatment; K is the natural degradation coefficient. This formula is applicable to degradable pollutants, and the degradation conforms to the first-order reaction kinetics, that is, the degradation rate is proportional to the remaining pollutant concentration. i represents the i-th water pollution source item; j represents the j-th water pollution reduction item; n represents the number of source items; m represents the total number of source items and reduction items.

[0113] Step b2, calculate the tolerable load based on the water environment dynamics model, the flow rate of the effluent water body within a preset time period, and the local water quality standard; take the domestic sewage discharge load from residents' production and living as the actual total sewage discharge load.

[0114] Specifically, calculate the total water pollution load within a preset time period based on the water environment dynamics model under the preset steady-state emission state. The preset steady-state emission state refers to that the pollutant concentration does not change within the time period. The preset steady-state emission state is:

[0115]

[0116] Under the preset steady-state emission state, formula (6) can be converted to:

[0117]

[0118] Define a new water cycle period index E = V / Q, which can represent the water replacement efficiency of water bodies in the city. Substitute the water cycle index E = V / Q into formula (8) to obtain:

[0119]

[0120] According to formula (9), obtain the total water pollution load L of the urban system outflow during the time period Δt out It is:

[0121]

[0122] In an alternative implementation manner, the calculation of the allowable load based on the total water pollution load, the outflow water body flow rate, and the local water quality standard in the above step b2 includes:

[0123] Step b21, calculate the maximum limit value of the water pollution load of the outflow water body based on the outflow water body flow rate and the local water quality standard within a preset time period.

[0124] Specifically, according to the water area function and classification, to make the water quality of the local river outflow section reach or exceed a specific standard, the following conditions need to be met:

[0125] L out = QCΔt ≤ QC s Δt(11);

[0126] Among them, C s Is the water quality standard limit value of the local river outflow section. Substitute formula (10) into formula (11) to obtain:

[0127]

[0128] Let:

[0129]

[0130] Among them, L max Is the maximum limit value of the water pollution load of the outflow water body; L point Is the sewage discharge load of residents' production (including the secondary and tertiary industries) and life, that is, the actual total sewage discharge load; L sum Is other water pollution sources and reduction loads except L point Then:

[0131] Q1C1Δt + L sum ≤ (KE + 1)L max (14);

[0132] Step b22, determine the allowable load based on the water environment dynamics model, the maximum limit value of the water pollution load of the outflow water body, and other water pollution sources and reduction loads except the sewage discharge load of residents' production and life.

[0133] Specifically, the load that can be accommodated is the maximum limit value L of the sewage discharge load L from residents' production and living point that can be accommodated capacity is:

[0134] L capacity =(KE + 1)L max −L sum (15).

[0135] Among them, L capacity is the load that can be accommodated.

[0136] Step b3: Determine the water environment carrying capacity assessment model based on the load that can be accommodated and the total actual sewage discharge load.

[0137] Specifically, by comparing and analyzing the sewage discharge loads from residents' production and living that can be accommodated in the water environment over the years, that is, the load L that can be accommodated capacity and the total actual sewage discharge load L point , the evolution status of the regional water environment carrying capacity is obtained, and the water environment carrying capacity is evaluated.

[0138] The method for measuring the comprehensive water resources and environment carrying capacity applicable to urban areas provided in this embodiment converts the process of determining the water environment carrying capacity assessment model based on water environment element data and social and economic element data into a process of solving and comparing the load that can be accommodated and the total actual sewage discharge load, numericalizes the water environment carrying capacity assessment, considers that the water pollutants in the urban area mainly come from sewage discharge from residents' production and living, river inflow, river outflow, non-point source pollution, external transferred water pollution, etc., and also considers the gradual reduction of pollution load through processes such as artificial sewage treatment and natural degradation, improving the calculation rationality and accuracy of the load that can be accommodated and the total actual sewage discharge load.

[0139] Step S203: Fit the human-water interaction relationship equations based on water resources element data, water environment element data, and social and economic element data. For details, please refer to Figure 1 Step S103 of the embodiment shown, which will not be elaborated here.

[0140] Step S204: Solve the results of the comprehensive water resources and environment carrying capacity based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model, and the human-water interaction relationship equations. For details, please refer to Figure 1 Step S103 of the embodiment shown, which will not be elaborated here.

[0141] The method for measuring the comprehensive water resources and environment carrying capacity applicable to urban areas provided in this embodiment determines the water resources carrying capacity assessment model based on water resources element data; determines the water environment carrying capacity assessment model based on water environment element data, providing conditions for subsequent construction of the comprehensive water resources and environment carrying capacity measurement model.

[0142] In this embodiment, a method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas is provided, which can be used in computers, servers, etc. Figure 3 It is a flowchart of the method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to an embodiment of the present invention, as Figure 3 shown. The process includes the following steps:

[0143] Step S301, obtain water resource element data, water environment element data, and social and economic element data. For details, please refer to Figure 2 step S201 of the embodiment shown here, which will not be elaborated here.

[0144] Step S302, respectively determine the water resource carrying capacity evaluation model and the water environment carrying capacity evaluation model based on the water resource element data and the water environment element data. For details, please refer to Figure 2 step S202 of the embodiment shown here, which will not be elaborated here.

[0145] Step S303, fit the human-water interaction relationship equations based on the water resource element data, the water environment element data, and the social and economic element data.

[0146] Specifically, first select a suitable binary or multiple regression equation formula, fit it based on the historical data of the water resource element data, the water environment element data, and the social and economic element data, and use the least squares method to estimate the unknown parameters to determine the quantified human-water interaction relationship equations.

[0147] The formula of the binary or multiple regression equation is as follows:

[0148]

[0149] Among them, y is the dependent variable to be fitted, x refers to the independent variable related to y, and w1, w2, w3, w4, w5 respectively represent the unknown parameters to be fitted.

[0150] The specific calculation steps for estimating the unknown parameters using the least squares method are as follows:

[0151] Let (x, y) be a pair of observed values (the observed values refer to the historical observation data of a certain period of time, and the historical observation data all come from the water resource element data, the water environment element data, and the social and economic element data), and x = [x1, x2,..., x m T ∈R n , and satisfy the following theoretical function:

[0152] y = f(x, w) (17);

[0153] Among them, w = [w1, w2,..., w n T is the unknown parameter.​​

[0154] To find the optimal estimate of the unknown parameter w of the function f(x, w), for the given m sets (usually m > n) of observed data, solve the objective function:

[0155]

[0156] where L i (x) (i = 1, 2, …, m) is the residual function.

[0157] Specifically, the water resource element data also includes precipitation, the production water consumption includes the production water consumption of the primary industry, the production water consumption of the secondary industry, and the production water consumption of the tertiary industry, and the domestic water consumption includes the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, and the per capita domestic water consumption of rural residents; the social and economic element data includes the permanent population, the urbanization rate, the gross domestic product of each industry, and the value of high-tech industries; the human-water interaction relationship equations include the first human-water interaction relationship equations; the above step S303 includes:

[0158] Step S3031, based on precipitation, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, the per capita domestic water consumption of rural residents, the permanent population, the urbanization rate, the gross domestic product of each industry, and the value of high-tech industries, fit to obtain the first human-water interaction relationship equations.

[0159] Specifically, the specific formula for fitting the first human-water interaction relationship equations based on precipitation, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, the per capita domestic water consumption of rural residents, the permanent population, the urbanization rate, the gross domestic product of each industry, and the value of high-tech industries is as follows:

[0160]

[0161]

[0162] PC = P × c(23);

[0163] PR = P × (1 - c)(24);

[0164] where pre is precipitation, in units of mm; T is the regional science and technology level, and in this embodiment, the high-tech industry output value index is used to represent the regional science and technology level, in units of 100 million yuan; GDP primary 、GDP secondary 、GDP tertiaryGDP of the primary industry, secondary industry, and tertiary industry respectively, in 100 million yuan; WC per is the per capita domestic water consumption of urban residents, in L / d (liters per day); WR per is the per capita domestic water consumption of rural residents, in L / d; PC is the permanent urban population, in 10,000 people; PR is the permanent rural population, in 10,000 people; P is the permanent population, in 10,000 people; c is the urbanization rate, in %.

[0165] The water environment element data also includes the sewage discharge volume of residents' production and domestic use, the sewage discharge volume of urban residents' domestic use, the sewage discharge coefficient of urban residents' domestic use, the production sewage discharge volume of the secondary industry, the production sewage discharge volume of the tertiary industry, the sewage discharge coefficient of the secondary and tertiary industries, the sewage discharge concentration, the sewage treatment reduction load, the discharge concentration after sewage treatment, and the non-point source pollution load; the social and economic element data also includes the GDP of the primary industry and the built-up area at the end of the year; the human-water interaction relationship equations also include the second human-water interaction relationship equations; the above step S303 also includes:

[0166] Step S3032, based on the sewage discharge volume of residents' production and domestic use, the sewage discharge volume of urban residents' domestic use, the sewage discharge coefficient of urban residents' domestic use, the production sewage discharge volume of the secondary industry, the production sewage discharge volume of the tertiary industry, the sewage discharge coefficient of the secondary and tertiary industries, the sewage discharge concentration, the sewage treatment reduction load, the discharge concentration after sewage treatment, the non-point source pollution load, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the permanent population quantity, the urbanization rate, the GDP of the primary industry, the value of high-tech industries, and the built-up area at the end of the year, fit to obtain the second human-water interaction relationship equations.

[0167] Specifically, the specific formula for obtaining the second human-water interaction relationship equations based on the sewage discharge volume of residents' production and domestic use, the sewage discharge volume of urban residents' domestic use, the sewage discharge coefficient of urban residents' domestic use, the production sewage discharge volume of the secondary industry, the production sewage discharge volume of the tertiary industry, the sewage discharge coefficient of the secondary and tertiary industries, the sewage discharge concentration, the sewage treatment reduction load, the discharge concentration after sewage treatment, the non-point source pollution load, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the permanent population quantity, the urbanization rate, the GDP of the primary industry, the value of high-tech industries, and the built-up area at the end of the year is as follows:

[0168] D point = DC domestic + D secondary + D tertiary (25);

[0169] DC domestic = WC domestic × pc × 10 4 (26);

[0170] D secondary +D tertiary =(W secondary +W tertiary )×pi×10 4 (27);

[0171]

[0172]

[0173] L npoint =exp(0.63×lnpre + 3.11×lnGDP primary - 1.22×lnAB)(31);

[0174] Wherein, D point is the sewage discharge of residents' production (including secondary and tertiary industries) and living, in ten thousand tons; DC domestic is the sewage discharge of urban residents' living, in ten thousand tons; pc is the sewage discharge coefficient of urban residents' living, dimensionless; D secondary and D tertiary are respectively the sewage discharges of secondary industry and tertiary industry production, in ten thousand tons; pi is the sewage discharge coefficient of secondary industry and tertiary industry, dimensionless; sw is the sewage treatment rate, in %; L point is the sewage discharge load of residents' production and living, in kg; C nsw is the sewage discharge concentration, in mg / L (milligrams per liter); L sw is the sewage treatment reduction load, in kg; C sw is the discharge concentration of sewage after treatment, in mg / L; L npoint is the non-point source pollution load, in kg; AB is the built-up area at the end of the year, in square kilometers.

[0175] Step S304, solve the result of the comprehensive water resources and environment carrying capacity based on the water resources carrying capacity evaluation model, water environment carrying capacity evaluation model and the human-water interaction relationship equations.

[0176] Specifically, integrating the two dimensions of water quantity and water quality, applying the "barrel principle" to the integration of the comprehensive water resources and environment carrying capacity on the basis of the water resources carrying capacity and water environment carrying capacity, and taking the smaller value of each item in the water resources carrying capacity and water environment carrying capacity in each period as the lower envelope line to form the comprehensive water resources and environment carrying capacity at the urban scale.

[0177] The above-mentioned step S304 includes:

[0178] Step S3041, solve the water resources-carrying population and gross domestic product in a preset period based on the water resources carrying capacity evaluation model and the first human-water interaction relationship equations.

[0179] Specifically, by combining formulas (2) to (5) with formulas (19) to (24), the water resources - carrying capacity of population and GDP are obtained. The relationship between the population quantity and GDP is determined by the actual per - capita GDP of the current year, and the remaining unknown variables such as the proportion of the GDP of the primary, secondary, and tertiary industries and the urbanization rate all adopt the actual values of the current year. The comparison charts of the water resources - carrying capacity of population in the study area and the actual population, and the comparison charts of the water resources - carrying capacity of GDP in the study area and the actual GDP are respectively as Figure 5 and Figure 7 shown.

[0180] Step S3042: Solve the water environment - carrying capacity of population and GDP in the preset period based on the water environment - carrying capacity assessment model and the second human - water interaction relationship equations.

[0181] Specifically, by combining formula (13), formula (15), and formulas (25) to (31), the water environment - carrying capacity of population and GDP are obtained. The comparison charts of the water environment - carrying capacity of population in the study area and the actual population, and the comparison charts of the water environment - carrying capacity of GDP in the study area and the actual GDP are respectively as Figure 6 and Figure 8 shown.

[0182] Step S3043: Based on the barrel principle, select the smaller value between the water resources - carrying capacity of population and GDP in the preset period and the water environment - carrying capacity of population and GDP in the corresponding period as the result of the comprehensive water resources and environment carrying capacity.

[0183] Specifically, based on the barrel principle, take the smaller value between the water resources - carrying capacity of population in each period and the water environment - carrying capacity of population as the final result of the comprehensive - carrying - capacity of population; take the smaller value between the water resources - carrying capacity of GDP in each period and the water environment - carrying capacity of GDP as the final result of the comprehensive - carrying - capacity of GDP. The comparison charts of the comprehensive water resources and environment - carrying capacity of population in the study area and the actual population, and the comparison charts of the comprehensive water resources and environment - carrying capacity of GDP in the study area and the actual GDP are respectively as Figure 9 and Figure 10 shown.

[0184] The comprehensive carrying capacity measurement method of water resources environment applicable to urban areas provided by this embodiment fits the first human-water interaction relationship equations based on water resources element data and social and economic element data; and fits the second human-water interaction relationship equations based on water environment element data, water resources element data and social and economic element data. Starting from the human-water interaction relationship, the first human-water interaction relationship equations and the second human-water interaction relationship equations suitable for the water resources environment of urban areas are determined, providing conditions for solving the comprehensive carrying capacity results of the water resources environment. Based on the water resources carrying capacity assessment model and the first human-water interaction relationship equations, the population and GDP that can be carried by water resources in a preset period are solved; based on the water environment carrying capacity assessment model and the second human-water interaction relationship equations, the population and GDP that can be carried by the water environment in a preset period are solved; and by integrating two aspects of water resources carrying capacity and water environment carrying capacity, the smaller value of the population and GDP that can be carried by water resources in a preset period and the population and GDP that can be carried by the water environment in the corresponding period is selected as the comprehensive carrying capacity result of the water resources environment based on the cask principle, realizing the quantitative calculation of the threshold of the comprehensive carrying capacity of the water resources environment, and providing relatively objective scientific support for guiding water resources management and water environment protection in urban areas.

[0185] As one or more specific application embodiments of the embodiment of the present invention, in combination with Figures 4 to 10 , taking a certain city as the case area and the period from 2010 to 2020 as the research period, and calculating the water environment taking the total phosphorus index as an example, the comprehensive carrying capacity measurement method of water resources environment applicable to urban areas provided by the present invention is further described in detail. As Figure 4 shown, the specific steps are as follows:

[0186] Step 1: Data collection and preprocessing: Collect water resources element data, water environment element data, and social and economic element data of the target research area during the research period. Among them, relevant data such as water resources and water environment are sourced from the municipal water resources bulletin, provincial water resources bulletin, municipal environmental quality bulletin, etc. Social and economic data are sourced from the city's "Statistical Yearbook", "A Certain Statistical Bulletin", etc. The available transit water volume data is sourced from various water intake license decisions announced by the Water Resources Commission of the Ministry of Water Resources, and the water intake source is the river section within the city. Non-point source pollution is approximately estimated using the ECM model, and the calculation formula is as follows:

[0187]

[0188] Among them, Lnon is the estimated non-point source pollutant load; E k is the output coefficient of the kth type of pollution source; A k is the quantity of the kth type of pollution source; l is the number of pollution source types; P is the quantity of nutrients input by rainfall.

[0189] Step 2. Evaluation of the evolution status of water resources carrying capacity and water environment carrying capacity: This includes separately constructing an evaluation model for the water resources carrying capacity and an evaluation model for the water environment carrying capacity in the urban area, and analyzing and evaluating the evolution status of the water resources carrying capacity and water environment carrying capacity in the study area.

[0190] The evaluation of water resources carrying capacity considers the available local water resources, the available cross-border water volume, and the recycled wastewater volume. Among them, the total available local water resources are obtained by multiplying the surface water resources volume and the groundwater resources volume by the corresponding empirical coefficients respectively; the available cross-border water volume is sorted out according to the various water intake permits announced by the basin committee; the recycled wastewater volume is obtained by multiplying the total water consumption by the recycling rate of each year. The specific formulas are as follows:

[0191] W use = W industry + W domestic + W ecological (2);

[0192] W industry = W primary + W secondary + W tertiary (3);

[0193] W domestic = WC domestic + WR domestic (4);

[0194] Among them: W use represents the actual water consumption; W industry , W domestic , W ecological are the production water consumption, domestic water consumption, and ecological water consumption respectively, with the unit of 100 million m 3 ; W primary , W secondary , W tertiary are the production water consumption of the primary, secondary, and tertiary industries respectively, with the unit of 100 million m 3 ; WC domestic , WR domestic are the domestic water consumption of urban residents and rural residents respectively, with the unit of 100 million m 3 ; W use represents the actual water consumption; W industry , W domestic , W ecological are the production water consumption, domestic water consumption, and ecological water consumption respectively, with the unit of 100 million m 3 ; W primary , W secondary , W tertiary are the production water consumption of the primary, secondary, and tertiary industries respectively, with the unit of 100 million m 3 ; WC domestic , WR domesticThey are the domestic water consumption of urban residents and rural residents respectively, with the unit of 100 million m 3 .

[0195] The calculation formula for the total available water resources is as follows:

[0196]

[0197] Among them, the total available water resources W capacity consist of the locally available water resources W local , the available cross-border water volume W transit and the reused wastewater volume W ruse ; the locally available water resources W surface is obtained by multiplying the surface water resources volume W ground and the groundwater resources volume W local by the corresponding empirical coefficients; W transit represents the available cross-border water volume obtained by summarizing and sorting out the water intake permits in the study area according to the Ministry of Water Resources.

[0198] By comparing and analyzing the total available water resources and the actual water consumption over the years, the evolution of the regional water resources carrying capacity is obtained. The statistical table of the calculation results of the water resources carrying capacity is shown in Table 1 below:

[0199] Table 1

[0200]

[0201]

[0202] In the assessment of the water environment carrying capacity, the entire urban area is generalized as a water tank. Considering that the water pollutants in the urban area mainly come from the sewage discharged from residents' production and life, river inflows, river outflows, and non-point source pollution, and also considering the gradual reduction of the pollution load through artificial sewage treatment and natural degradation processes. Since there is no large-scale external water diversion source in this city, the impact of external water pollution is ignored. Water quality indicators represent the types and quantities of impurities in water, and they are specific measurement scales for judging the degree of water pollution. Common indicators include odor, water temperature, turbidity, pH value, conductivity, dissolved solids, suspended solids, total phosphorus, total nitrogen, total organic carbon (TOC), dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total bacteria count, coliform group, etc. In this invention, the total phosphorus is taken as an example for calculation. After derivation, the specific formula is as follows:

[0203] L max =QC s Δt

[0204] L point =Q1C1Δt

[0205]

[0206] Q1C1Δt + L sum ≤(KE + 1)L max (14);

[0207] Wherein, Q is the flow rate of the urban effluent water body; C s is the water quality standard limit value of the local river effluent cross-section; t is the time; V is the total amount of water resources in the city; Q i 、C i (i = 1, 2, …, n) are the flow rates and concentrations corresponding to each water pollution source item such as residential production (including secondary and tertiary industries), domestic sewage discharge, non-point source pollution generation, river inflow, and external transferred water pollution, etc.; Q j 、C j (j = n + 1, 2, …, m) are the flow rates and concentrations corresponding to each water pollution reduction item such as sewage treatment, etc.; K is the natural degradation coefficient; E = V / Q is the water cycle period index; L max is the maximum limit value of the pollution load of the effluent water body; L point is the pollution discharge load of residential production (including secondary and tertiary industries), that is, the total actual pollution discharge load; L sum is the other water pollution sources and reduction loads except L point ; L point is the allowable load, that is, the allowable pollution discharge load of residential production and life.

[0208] By comparing and analyzing the allowable pollution discharge load of residential production and life that the water environment can accommodate over the years with the total actual pollution discharge load, the evolution status of the regional water environment carrying capacity is obtained. The statistical table of the calculation results of the water environment carrying capacity is shown in Table 2 below:

[0209] Table 2

[0210]

[0211] Step 3: Sort out the human-water interaction relationship: Based on historical data such as water resource element data, water environment element data, and social and economic element data, summarize the variation laws among the elements, and conduct a qualitative analysis of the causal relationships among the elements; select appropriate binary or multiple regression equations, and use R software (R software is a computer software for statistical analysis, graphing language, and operating environment) to fit the relationships among the elements based on historical data, estimate the unknown parameters according to the least squares method, and determine the quantitative human-water interaction relationship equation. Among them, for some parameter values, refer to relevant planning standards. For example, C nsw is the sewage discharge concentration, and refer to the "Quality Standard for Sewage Discharged into Urban Sewers" (GB_T 31962 - 2015) to take 8 mg / L; C swThe discharge concentration after sewage treatment, referring to the "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants" (GB 18918-2002), is taken as 0.5 mg / L; in this embodiment, the total phosphorus is taken as an example for calculation. According to the water area function and classification standard, since the section of the river passing through this city belongs to Class III of the "Surface Water Environment Quality Standard" (GB3838-2002), in order to make the water quality at the cross-section of the city boundary reach or be better than Class III standard, the water quality standard limit C s is taken as 0.2 mg / L.

[0212] The specific formula of the first human-water interaction relationship equations set obtained by fitting based on water resource element data and social and economic element data is as follows:

[0213]

[0214] PC = P × c (23);

[0215] PR = P × (1 - c) (24);

[0216] Among them, pre is precipitation, with the unit of mm; T is the regional science and technology level. In this embodiment, the high-tech industry output value index is used to represent the regional science and technology level, with the unit of 100 million yuan; GDP primary 、GDP secondary 、GDP tertiary are the GDPs of the primary industry, secondary industry and tertiary industry respectively, with the unit of 100 million yuan; WC per is the per capita domestic water consumption of urban residents, taking the empirical value of 150 L / d (liters per day); WR per is the per capita domestic water consumption of rural residents, taking the empirical value of 100 L / d; PC is the urban permanent population, with the unit of 10,000 people; PR is the rural permanent population, with the unit of 10,000 people; P is the permanent population, with the unit of 10,000 people; c is the urbanization rate, with the unit of %.

[0217] The specific formula of the second human-water interaction relationship equations set obtained by fitting based on water environment element data, water resource element data and social and economic element data is as follows:

[0218] D point = DC domestic + D secondary + D tertiary (25);

[0219] DC domestic = WC domestic × pc × 10 4 (26);

[0220] D secondary + D tertiary = (W secondary + W tertiary ) × pi × 104 (27);

[0221]

[0222] L npoint = exp(0.63×lnpre + 3.11×lnGDP primary - 1.22×lnAB)(31);

[0223] where D point is the discharge of domestic sewage for production (including secondary and tertiary industries) and living, in ten thousand tons; DC domestic is the discharge of domestic sewage for urban residents' living, in ten thousand tons; pc is the discharge coefficient of domestic sewage for urban residents, dimensionless; D secondary , D tertiary are the discharges of industrial sewage for the secondary and tertiary industries respectively, in ten thousand tons; pi are the sewage discharge coefficients of the secondary and tertiary industries, dimensionless; sw is the sewage treatment rate, in %; L point is the pollution load of domestic sewage for production and living, in kg; C nsw is the sewage discharge concentration, in mg / L (milligrams per liter); L sw is the sewage treatment reduction load, in kg; C sw is the discharge concentration of sewage after treatment, in mg / L; L npoint is the non-point source pollution load, in kg; AB is the built-up area at the end of the year, in square kilometers.

[0224] Step 4. Quantitative solution of the comprehensive carrying capacity of the water resources environment: Based on the human-water interaction relationship, combined with the evaluation models of water resources carrying capacity and water environment carrying capacity, integrating the two dimensions of water quantity and water quality, a measurement model of the comprehensive carrying capacity of the water resources environment is constructed to quantitatively solve the maximum population and GDP scale that the comprehensive carrying capacity of the water resources environment in the study area can support. Among them, the integration of the two dimensions of water quantity and water quality is based on the "barrel principle" on the basis of the single carrying capacities of water resources and water environment, taking the smaller value of the single item in the water resources carrying capacity and water environment carrying capacity in each period as the lower envelope line to form the comprehensive carrying capacity of the water resources environment at the urban scale. The specific calculation steps are as follows:

[0225] 1) Jointly solve equations (2) to (5) and equations (19) - (24), where the relationship between population and GDP is determined by the actual per capita GDP of the current year, and the remaining unknown variables such as the proportion of GDP of the primary, secondary, and tertiary industries and the urbanization rate are all adopted as the actual values of the current year, to obtain the population P W that the water resources can support and the industrial value GDP W ; The comparison charts of the population that the water resources carrying capacity of the study area can support and the actual population, and the comparison charts of the GDP that the water resources carrying capacity of the study area can support and the actual GDP are respectively asFigure 5 and Figure 7 as shown

[0226] 2) Jointly solve equations (13), (15), and (25) to (31), where the relationship between population and GDP is determined by the actual per capita GDP of the current year, and the proportions of the GDP of the primary, secondary, and tertiary industries and the remaining unknown variables of the urbanization rate all adopt the actual values of the current year, to obtain the population P that the water environment can support in each year L and the industrial value GDP L ; The comparison chart of the population that the water environment carrying capacity of the research area can support and the actual population, and the comparison chart of the GDP that the water environment carrying capacity of the research area can support and the actual GDP are respectively as Figure 6 and Figure 8 as shown

[0227] 3) Take the smaller value of the population and GDP that can be supported by a single item in the water resources carrying capacity and the water environment carrying capacity in each year as the final result of the comprehensive carrying capacity. That is, the population P that the comprehensive water resources and environment carrying capacity can support WL = min(P W , P L ), and the population quantity GDP that the comprehensive water resources and environment carrying capacity can support WL = min(GDP W , GDP L ). The comparison chart of the population that the comprehensive water resources and environment carrying capacity of the research area can support and the actual population, and the comparison chart of the GDP that the comprehensive water resources and environment carrying capacity of the research area can support and the actual GDP are respectively as Figure 9 and Figure 10 as shown

[0228] In this embodiment, a measurement device for the comprehensive water resources and environment carrying capacity applicable to urban areas is further provided. This device is used to implement the above-mentioned embodiments and preferred implementation manners, and those that have been described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated

[0229] This embodiment provides a measurement device for the comprehensive water resources and environment carrying capacity applicable to urban areas, as Figure 11 shown, including:

[0230] A data acquisition module 1101, configured to acquire water resources element data, water environment element data, and socioeconomic element data

[0231] A carrying capacity evaluation model determination module 1102, configured to determine a water resources carrying capacity evaluation model based on the water resources element data, and determine a water environment carrying capacity evaluation model based on the water environment element data

[0232] The human - water interaction relationship fitting module 1103 is used to fit the human - water interaction relationship equations based on water resource element data, water environment element data, and socioeconomic element data.

[0233] The comprehensive carrying capacity measurement module 1104 is used to solve the comprehensive water resource and environment carrying capacity results based on the water resource carrying capacity assessment model, the water environment carrying capacity assessment model, and the human - water interaction relationship equations.

[0234] In some alternative embodiments, the carrying capacity assessment model determination module 1102 includes:

[0235] The first assessment model determination unit is used to determine the water resource carrying capacity assessment model based on water resource element data;

[0236] The second assessment model determination unit is used to determine the water environment carrying capacity assessment model based on water environment element data.

[0237] In some alternative embodiments, the water resource element data includes surface water resource quantity, groundwater resource quantity, total available local water resources, available cross - border water quantity, production water consumption, domestic water consumption, and ecological water consumption; the first assessment model determination unit includes:

[0238] The water quantity acquisition subunit is used to acquire the surface water resource quantity, groundwater resource quantity, available cross - border water quantity, production water consumption, domestic water consumption, and ecological water consumption from the water resource element data.

[0239] The actual water consumption determination subunit is used to determine the actual water consumption based on production water consumption, domestic water consumption, and ecological water consumption.

[0240] The wastewater reuse quantity determination subunit is used to determine the wastewater reuse quantity based on the actual water consumption and a preset reuse rate.

[0241] The local water resources available quantity determination subunit is used to determine the local water resources available quantity based on the surface water resource quantity and the groundwater resource quantity.

[0242] The total available water resources subunit is used to determine the total available water resources based on the local water resources available quantity, the available cross - border water quantity, and the wastewater reuse quantity.

[0243] The water resource carrying capacity assessment model determination subunit is used to determine the water resource carrying capacity assessment model based on the actual water consumption and the total available water resources.

[0244] In some alternative embodiments, the water environment element data includes the sewage load of residents' production and living, the pollution load of rivers entering the area, the water pollution load transferred from outside, the natural degradation amount of pollutants, the reduction amount of sewage treatment, the flow of the effluent water body, and the local water quality standard; the sewage load of residents' production and living, the pollution load of rivers entering the area, and the water pollution load transferred from outside are all calculated from the flow rate, concentration data, and sewage discharge time; the second evaluation model determination unit includes:

[0245] A model construction subunit, configured to construct a water environment dynamics model applicable to urban areas based on the sewage load of residents' production and living, the pollution load of rivers entering the area, the water pollution load transferred from outside, the non-point source pollution load, the natural degradation amount of pollutants, the reduction amount of sewage treatment, the mass conservation, and the hydrodynamic theory.

[0246] An allowable load calculation subunit, configured to calculate the allowable load based on the water environment dynamics model, the flow of the effluent water body within a preset time period, and the local water quality standard; and use the sewage load of residents' production and living as the total actual sewage discharge load.

[0247] A water environment carrying capacity evaluation model determination subunit, configured to determine a water environment carrying capacity evaluation model based on the allowable load and the total actual sewage discharge load.

[0248] In some alternative embodiments, the water resource element data further includes precipitation, the production water consumption includes the production water consumption of the primary industry, the production water consumption of the secondary industry, and the production water consumption of the tertiary industry, the domestic water consumption includes the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, and the per capita domestic water consumption of rural residents; the social and economic element data includes the permanent population, the urbanization rate, GDP, and the value of high-tech industries; the human-water interaction relationship equation set includes the first human-water interaction relationship equation set; the water environment element data further includes the sewage discharge amount of residents' production and living, the sewage discharge amount of urban residents' living, the sewage discharge coefficient of urban residents' living, the sewage discharge amount of the secondary industry production, the sewage discharge amount of the tertiary industry production, the sewage discharge coefficient of the secondary and tertiary industries, the sewage discharge concentration, the sewage treatment reduction load, the discharge concentration of the sewage after treatment, and the non-point source pollution load; the social and economic element data further includes the built-up area at the end of the year; the gross domestic product of each industry includes the gross domestic product of the primary industry;

[0249] The human-water interaction relationship equation set further includes the second human-water interaction relationship equation set;

[0250] The human-water interaction relationship fitting module 1103 includes:

[0251] The first fitting unit is used to fit and obtain the first human-water interaction relationship equations based on precipitation, water consumption for primary industry production, water consumption for secondary industry production, water consumption for tertiary industry production, domestic water consumption of urban residents, domestic water consumption of rural residents, per capita domestic water consumption of urban residents, per capita domestic water consumption of rural residents, the number of permanent residents, urbanization rate, gross domestic product of each industry, and the value of high-tech industries.

[0252] The second fitting unit is used to fit and obtain the second human-water interaction relationship equations based on the emissions of domestic and industrial sewage of residents, the emissions of domestic sewage of urban residents, the domestic sewage emission coefficient of urban residents, the emissions of industrial sewage of the secondary industry, the emissions of industrial sewage of the tertiary industry, the sewage emission coefficients of the secondary and tertiary industries, sewage emission concentration, sewage treatment reduction load, emission concentration after sewage treatment, non-point source pollution load, water consumption for primary industry production, water consumption for secondary industry production, water consumption for tertiary industry production, the number of permanent residents, urbanization rate, gross domestic product of the primary industry, the value of high-tech industries, and the built-up area at the end of the year.

[0253] In some alternative embodiments, the comprehensive carrying capacity measurement module 1104 includes:

[0254] The first solving unit is used to solve the water resources carrying capacity population and gross domestic product in a preset period based on the water resources carrying capacity assessment model and the first human-water interaction relationship equations.

[0255] The second solving unit is used to solve the water environment carrying capacity population and gross domestic product in a preset period based on the water environment carrying capacity assessment model and the second human-water interaction relationship equations.

[0256] The selection unit is used to select the smaller value between the water resources carrying capacity population and gross domestic product in a preset period and the water environment carrying capacity population and gross domestic product in the corresponding period as the result of the comprehensive water resources and environment carrying capacity based on the bucket principle.

[0257] The further function descriptions of the above-mentioned various modules and units are the same as those in the corresponding embodiments above, and will not be elaborated here.

[0258] The water resources and environment comprehensive carrying capacity measurement device applicable to urban areas in this embodiment is presented in the form of functional units. Here, the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and a memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0259] The embodiment of the present invention also provides a computer device having the above Figure 11 shown water resources and environment comprehensive carrying capacity measurement device applicable to urban areas.

[0260] Please refer to Figure 12 , Figure 12 which is a schematic structural diagram of a computer device provided by an alternative embodiment of the present invention. As Figure 12 shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including a high-speed interface and a low-speed interface. Each component communicates with each other using different buses and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed within the computer device, including instructions stored in the memory or on the memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some alternative embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a set of blade servers, or a multi-processor system). Figure 12 In

[0261]

[0262]

[0263]

[0264] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiments. The memory 20 can include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the computer device. In addition, the memory 20 can include a high-speed random access memory and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some alternative embodiments, the memory 20 can optionally include a memory remotely set relative to the processor 10, and these remote memories can be connected to the computer device through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and their combinations.​​The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid state drive; the memory 20 may further include a combination of the above types of memory.

[0265] The computer device further includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 12 Taking connection via a bus as an example.

[0266] The input device 30 can receive input digital or character information, and generate key signal inputs related to the user settings and function controls of the computer device, such as touch screen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., LED), and a haptic feedback device (e.g., vibration motor), etc. The above display device includes but is not limited to liquid crystal display, light emitting diode, display and plasma display. In some alternative embodiments, the display device may be a touch screen.

[0267] The embodiments of the present invention also provide a computer-readable storage medium. The methods according to the embodiments of the present invention can be implemented in hardware, firmware, or be implemented as computer code that can be recorded on a storage medium, or be implemented by downloading via a network the original computer code stored in a remote storage medium or a non-transitory machine-readable storage medium and to be stored in a local storage medium, so that the methods described herein can be stored in such software processes on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk or a solid state drive, etc.; further, the storage medium may further include a combination of the above types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code, and when the software or computer code is accessed and executed by the computer, the processor or the hardware, the methods shown in the above embodiments are implemented.

[0268] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for measuring the comprehensive carrying capacity of water resources and environment in urban areas, characterized in that: The method comprises: Obtain data on water resources elements, water environment elements, and socio-economic elements; Based on the water resource element data and the water environment element data, the water resource carrying capacity assessment model and the water environment carrying capacity assessment model are determined respectively; Based on the water resource element data, water environment element data and social economic element data, a group of human-water feedback relationship equations are obtained by fitting; Based on the water resources carrying capacity assessment model, water environment carrying capacity assessment model and the human-water feedback relationship equation group, the comprehensive carrying capacity of water resources and environment is solved; Determining a water resource carrying capacity assessment model and a water environment carrying capacity assessment model based on the water resource element data and the water environment element data respectively includes: Determine a water resources carrying capacity assessment model based on the water resources element data; Determine a water environment carrying capacity assessment model based on the water environment element data; The water resource element data include surface water resources, groundwater resources, available transit water, production water, domestic water, ecological water and precipitation. The production water includes the production water of the primary industry, the production water of the secondary industry and the production water of the tertiary industry. The domestic water includes the domestic water of urban residents, the domestic water of rural residents, the per capita domestic water of urban residents and the per capita domestic water of rural residents. The social and economic factor data include the number of permanent residents, urbanization rate, gross domestic product of each industry and the value of high-tech industries; The human-water mutual feedback relationship equation group includes a first human-water mutual feedback relationship equation group; Based on the water resource element data, water environment element data and social economic element data, the human-water feedback relationship equation group is fitted, including: Based on the precipitation, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, the per capita domestic water consumption of rural residents, the number of permanent residents, the urbanization rate, the gross domestic product of each industry and the value of high-tech industries, the first human-water feedback relationship equation group is fitted; The water environment factor data include the discharge of residential production and living sewage, the discharge of urban residential domestic sewage, the discharge coefficient of urban residential domestic sewage, the discharge of secondary industrial production sewage, the discharge of tertiary industrial production sewage, the discharge coefficient of secondary and tertiary industrial sewage, sewage discharge concentration, sewage treatment reduction load, sewage discharge concentration after treatment and rainfall surface source pollution load; The data on social and economic factors include the area of ​​built-up areas at the end of the year; the gross domestic product of each industry includes the gross domestic product of the primary industry; The human-water mutual feedback relationship equation group also includes a second human-water mutual feedback relationship equation group; The human-water feedback relationship equations obtained by fitting based on the water resource element data, water environment element data and social economic element data also include: Based on the discharge of residential production and living sewage, the discharge of urban residents' domestic sewage, the discharge coefficient of urban residents' domestic sewage, the discharge of secondary industry production sewage, the discharge of tertiary industry production sewage, the discharge coefficient of secondary and tertiary industries, sewage discharge concentration, sewage treatment reduction load, sewage discharge concentration after treatment, rainfall surface source pollution load, primary industry production water consumption, secondary industry production water consumption, tertiary industry production water consumption, permanent population, urbanization rate, primary industry gross domestic product, high-tech industry value and the built-up area at the end of the year, the second human-water mutual feedback relationship equation group is obtained by fitting; The results of solving the comprehensive carrying capacity of water resources and environment based on the water resources carrying capacity assessment model, water environment carrying capacity assessment model and the human-water feedback relationship equation group include: Based on the water resources carrying capacity assessment model and the first person-water mutual feedback relationship equation group, the water resources carrying capacity population and GDP for the preset period are solved; Based on the water environment carrying capacity assessment model and the second person-water mutual feedback relationship equation group, the water environment can carry the population and GDP for the preset period; Based on the barrel principle, the smaller value between the population and GDP that water resources can carry in a preset period and the population and GDP that the water environment can carry in the corresponding period is selected as the comprehensive carrying capacity of the water resources environment.

2. The method according to claim 1, characterized in that Determining a water resources carrying capacity assessment model based on the water resources element data includes: Obtaining the amount of surface water resources, groundwater resources, available transit water, production water consumption, domestic water consumption and ecological water consumption from the water resource element data; Determine the actual water consumption based on the production water consumption, domestic water consumption and ecological water consumption; Determine the amount of wastewater reuse based on actual water consumption and preset reuse rate; Determine the availability of local water resources based on the amount of surface water resources and groundwater resources; Determine the total amount of available water resources based on the available local water resources, the amount of water available for transit and the amount of wastewater reuse; A water resource carrying capacity assessment model is determined based on the actual water consumption and the total available water resources.

3. The method according to claim 1, characterized in that The water environment factor data also include the sewage load of residents' production and life, the pollution load of rivers entering the country, the pollution load of external water transfer, the natural degradation of pollutants, the reduction of sewage treatment, the outflow flow rate of water bodies and local water quality standards; the sewage load of residents' production and life, the pollution load of rivers entering the country and the pollution load of external water transfer are all calculated from the flow rate, concentration data and sewage discharge time; Determining a water environment carrying capacity assessment model based on the water environment element data includes: A water environment dynamics model suitable for urban areas is constructed based on the sewage load of residents' production and life, the pollution load of rivers entering the country, the pollution load of external water transfer, the pollution load of non-point source, the natural degradation of pollutants, the reduction of sewage treatment, mass conservation and hydrodynamic theory; the accommodated load is calculated based on the water environment dynamics model, the outflow water flow rate within a preset time period and the local water quality standard; the sewage load of residents' production and life is taken as the actual total sewage load; The water environment carrying capacity assessment model is determined based on the accommodated load and the actual total sewage load.

4. The method according to claim 3, characterized in that The calculation of the load that can be accommodated based on the water environment dynamics model, the outflow water flow rate within a preset time period and the local water quality standard includes: Calculate the maximum limit of the pollution load of the outflowing water body based on the outflowing water body flow rate and the local water quality standard within the preset time period; The accommodated load is determined based on the water environment dynamics model, the maximum limit of the pollution load of the outflow water body, other sources of water pollution except the sewage load of residents' production and life, and the reduced load.

5. A water resource environment comprehensive carrying capacity measuring device suitable for urban areas, characterized in that: The device comprises: A data acquisition module, used to acquire water resource element data, water environment element data and socio-economic element data; A carrying capacity assessment model determination module, used to determine a water resource carrying capacity assessment model based on the water resource element data, and to determine a water environment carrying capacity assessment model based on the water environment element data; A human-water mutual feedback relationship fitting module is used to fit the human-water mutual feedback relationship equation group based on the water resource element data, water environment element data and social economic element data; Comprehensive carrying capacity measurement module, used to solve the comprehensive carrying capacity of water resources and environment based on the water resources carrying capacity assessment model, water environment carrying capacity assessment model and human-water feedback relationship equation group; Determining a water resource carrying capacity assessment model and a water environment carrying capacity assessment model based on the water resource element data and the water environment element data respectively includes: Determine a water resources carrying capacity assessment model based on the water resources element data; Determine a water environment carrying capacity assessment model based on the water environment element data; The water resource element data include surface water resources, groundwater resources, available transit water, production water, domestic water, ecological water and precipitation. The production water includes the production water of the primary industry, the production water of the secondary industry and the production water of the tertiary industry. The domestic water includes the domestic water of urban residents, the domestic water of rural residents, the per capita domestic water of urban residents and the per capita domestic water of rural residents. The social and economic factor data include the number of permanent residents, urbanization rate, gross domestic product of each industry and the value of high-tech industries; The human-water mutual feedback relationship equation group includes a first human-water mutual feedback relationship equation group; Based on the water resource element data, water environment element data and social economic element data, the human-water feedback relationship equation group is fitted, including: Based on the precipitation, the production water consumption of the primary industry, the production water consumption of the secondary industry, the production water consumption of the tertiary industry, the domestic water consumption of urban residents, the domestic water consumption of rural residents, the per capita domestic water consumption of urban residents, the per capita domestic water consumption of rural residents, the number of permanent residents, the urbanization rate, the gross domestic product of each industry and the value of high-tech industries, the first human-water feedback relationship equation group is fitted; The water environment factor data include the discharge of residential production and living sewage, the discharge of urban residential domestic sewage, the discharge coefficient of urban residential domestic sewage, the discharge of secondary industrial production sewage, the discharge of tertiary industrial production sewage, the discharge coefficient of secondary and tertiary industrial sewage, sewage discharge concentration, sewage treatment reduction load, sewage discharge concentration after treatment and rainfall surface source pollution load; The data on social and economic factors also include the area of ​​built-up areas at the end of the year; the GDP of each industry includes the GDP of the primary industry; The human-water mutual feedback relationship equation group also includes a second human-water mutual feedback relationship equation group; The human-water feedback relationship equations obtained by fitting the water resource element data, water environment element data and social economic element data also include: Based on the discharge of residential production and living sewage, the discharge of urban residents' domestic sewage, the discharge coefficient of urban residents' domestic sewage, the discharge of secondary industry production sewage, the discharge of tertiary industry production sewage, the discharge coefficient of secondary and tertiary industries, sewage discharge concentration, sewage treatment reduction load, sewage discharge concentration after treatment, rainfall surface source pollution load, primary industry production water consumption, secondary industry production water consumption, tertiary industry production water consumption, permanent population, urbanization rate, primary industry gross domestic product, high-tech industry value and the built-up area at the end of the year, the second human-water mutual feedback relationship equation group is obtained by fitting; The results of solving the comprehensive carrying capacity of water resources and environment based on the water resources carrying capacity assessment model, water environment carrying capacity assessment model and the human-water feedback relationship equation group include: Based on the water resources carrying capacity assessment model and the first person-water mutual feedback relationship equation group, the water resources carrying capacity population and GDP for the preset period are solved; Based on the water environment carrying capacity assessment model and the second person-water mutual feedback relationship equation group, the water environment can carry the population and GDP for the preset period; Based on the barrel principle, the smaller value between the population and GDP that water resources can carry in a preset period and the population and GDP that the water environment can carry in the corresponding period is selected as the comprehensive carrying capacity of the water resources environment.

6. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the comprehensive carrying capacity measurement method for water resources environment applicable to urban areas as described in any one of claims 1 to 4 by executing the computer instructions.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to any one of claims 1 to 4.

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