Water resource environment comprehensive bearing capacity metering method and device suitable for urban areas

Abstract

The invention relates to the technical field of water system bearing capacity of social hydrology, and discloses a water resource environment comprehensive bearing capacity metering method and device suitable for an urban district, and the method comprises the steps: obtaining water resource element data, water environment element data and social economic element data; respectively determining a water resource bearing capacity evaluation model and a water environment bearing capacity evaluation model based on the water resource element data and the water environment element data; fitting based on the water resource element data, the water environment element data and the social and economic element data to obtain a human-water mutual feedback relation equation set; and solving a water resource environment comprehensive bearing capacity result based on the water resource bearing capacity evaluation model, the water environment bearing capacity evaluation model and the human-water mutual feedback relation equation set. According to the method, two dimensions of water quantity and water quality are integrated on the basis of a human-water mutual feedback relationship, a water resource environment comprehensive bearing capacity result can be quantitatively solved, and objective scientific support can be provided for guiding urban area water resource management and water environment protection.

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 assessment is generally based on multi-index assessment models, such as entropy weight method, hierarchical analysis method, fuzzy comprehensive evaluation method, principal component analysis method, pressure-state-response model, etc., to calculate the carrying capacity index to determine whether water resources are overused. The above mathematical statistics-based methods blur the concept of carrying capacity, do not consider the coupling effect between influencing factors, and are difficult to determine the interaction between the factors involved and the dynamic change process of carrying capacity, thus lacking accurate identification of the maximum socio-economic scale that urban water resources can carry. With the deepening of research, existing studies pay more attention to the feedback between the various factors affecting water resource carrying capacity, and quantitatively calculate water resource carrying capacity through mathematical equations or models including ecological footprint method, projection tracking method, system dynamics method, etc. These methods still have certain limitations in establishing more reasonable and quantitative water resource carrying capacity assessment equations and models. In the current context of urbanization, the development and utilization of water resources involves an increasingly complex relationship between people and water, which intensifies the challenge of solving the problem of water resource carrying capacity. As a spatial carrier of frequent human activities, cities are key nodes for the interaction between natural background conditions and socio-economic elements. However, current research on water resource carrying capacity in urban areas that fully considers the feedback relationship between people and water is still insufficient, and it is difficult to reasonably quantify the threshold of urban economic development that water resources can carry. 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 suitable for urban areas, so as to solve the problem that it is difficult to reasonably quantify the carrying capacity threshold of water resources.

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

[0007] Obtain data on water resources elements, water environment elements, and socio-economic elements;

[0008] 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;

[0009] Based on the data of water resources elements, water environment elements and social economic elements, the equations of the human-water feedback relationship were fitted.

[0010] The comprehensive carrying capacity of water resources and environment is solved based on the water resources carrying capacity assessment model, water environment carrying capacity assessment model and the human-water feedback relationship equation group.

[0011] The water resource environment comprehensive carrying capacity measurement method applicable to urban areas provided by the present invention determines a water resource carrying capacity assessment model based on water resource element data, and determines a water environment carrying capacity assessment model based on water environment element data; obtains a group of human-water mutual feedback relationship equations based on fitting of water resource element data, water environment element data and socio-economic element data; constructs a water resource environment comprehensive carrying capacity measurement model based on the water resource carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water mutual feedback relationship equation group, and solves the water resource environment comprehensive carrying capacity result based on the water resource environment comprehensive carrying capacity measurement model. Based on the human-water mutual feedback relationship, the present invention integrates two dimensions of water resources and water environment, and can quantitatively solve the comprehensive carrying capacity result of water resource environment in the study area, that is, the maximum population 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 more objective scientific support for guiding water resource management and water environment protection in urban areas.

[0012] In an optional implementation, determining 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 includes:

[0013] Determine the water resources carrying capacity assessment model based on water resources element data;

[0014] Determine the water environment carrying capacity assessment model based on water environment element data.

[0015] The method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas provided by the present invention determines a water resources carrying capacity assessment model based on water resources element data; determines a water environment carrying capacity assessment model based on water environment element data, and achieves the purpose of quantitatively assessing the water resources carrying capacity and the water environment carrying capacity by respectively constructing a mathematical calculation method, thereby providing conditions for subsequently combining with a group of human-water mutual feedback relationship equations to construct a water resources and environment comprehensive carrying capacity measurement model based on the human-water mutual feedback relationship.

[0016] In an optional implementation, the water resource element data includes surface water resources, groundwater resources, available transit water, production water, domestic water and ecological water;

[0017] The water resources carrying capacity assessment model based on water resources element data includes:

[0018] Obtain surface water resources, groundwater resources, available transit water, production water, domestic water and ecological water from water resource element data;

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

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

[0021] Determine the availability of local water resources based on the amount of surface water resources and groundwater resources;

[0022] 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;

[0023] The water resources carrying capacity assessment model is determined based on actual water consumption and the total amount of available water resources.

[0024] The present invention provides a method for measuring the comprehensive carrying capacity of water resources and the environment in urban areas. The method analyzes and evaluates the evolution of water resources carrying capacity through a water resources carrying capacity assessment model, and finally converts the water resources carrying capacity assessment model into a process of solving the total amount of available water resources and the actual water consumption, and performing quantitative comparisons. The water resources carrying capacity is quantified, and the water resources carrying capacity assessment model is simple to calculate, which provides a basis for the subsequent calculation of the comprehensive carrying capacity index of the water system.

[0025] In an optional implementation, the water environment factor data 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 pollution load of non-point source, the natural degradation of pollutants, the reduction of sewage treatment, the outflow water flow and the local water quality standard; 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, concentration data and sewage discharge time;

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

[0027] 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, the pollution load of external water, the pollution load of non-point sources, the natural degradation of pollutants, the reduction of sewage treatment, mass conservation and hydrodynamic theory;

[0028] The load that can be accommodated is calculated based on the water environment dynamics model, the outflow water flow in 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;

[0029] The water environment carrying capacity assessment model is determined based on the accommodated load and the actual total sewage load.

[0030] In an optional implementation, the calculation of the accommodative load based on the water environment dynamics model, the outflow water flow rate within a preset time period, and the local water quality standard includes:

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

[0032] The accommodated load is determined based on the water environment dynamics model, the maximum limit of the outflow water pollution load, other water pollution sources other than the sewage load of residents' production and life, and the reduction load.

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

[0034] In an optional implementation, 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 include the number of permanent residents, the urbanization rate, the gross domestic product of each industry, and the value of high-tech industries;

[0035] The human-water mutual feedback relationship equation group includes a first human-water mutual feedback relationship equation group;

[0036] Based on the water resources data, water environment data and socio-economic data, the human-water feedback relationship equations are fitted, including:

[0037] The first human-water feedback relationship equation group was obtained based on precipitation, water consumption of primary industry, water consumption of secondary industry, water consumption of tertiary industry, 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, number of permanent residents, urbanization rate, gross domestic product of each industry and value of high-tech industry.

[0038] In an optional implementation, the water environment factor data also includes 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, discharge concentration of treated sewage and non-point source pollution load;

[0039] 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;

[0040] The human-water mutual feedback relationship equation group also includes a second human-water mutual feedback relationship equation group;

[0041] Based on the water resources data, water environment data and socio-economic data, the human-water feedback relationship equations are also fitted:

[0042] The second set of human-water feedback relationship equations was obtained based on the discharge of residential production and domestic sewage, urban residents' domestic sewage, urban residents' domestic sewage discharge coefficient, secondary industry production sewage, tertiary industry production sewage, secondary and tertiary industry sewage discharge coefficients, sewage discharge concentration, sewage treatment reduction load, sewage discharge concentration after treatment, non-point source pollution load, primary industry production water consumption, secondary industry production water consumption, tertiary industry production water consumption, permanent population, urbanization rate, primary industry GDP, high-tech industry value and built-up area at the end of the year.

[0043] The method for measuring the comprehensive carrying capacity of water resources and environment in urban areas provided by the present invention obtains a first set of human-water mutual feedback equations based on water resources element data and socio-economic element data; and obtains a second set of human-water mutual feedback equations based on water environment element data, water resources element data and socio-economic element data. Starting from the mutual feedback relationship between people and water, the first set of human-water mutual feedback equations and the second set of human-water mutual feedback equations suitable for the water resources environment in urban areas are determined, which provides conditions for the subsequent solution of the comprehensive carrying capacity of water resources and environment.

[0044] In an optional implementation, solving the comprehensive carrying capacity of water resources and environment based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water feedback relationship equation group includes:

[0045] 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;

[0046] 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;

[0047] 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.

[0048] The method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas provided by the present invention solves the water resources carrying capacity population and gross domestic product for a preset period based on a water resources carrying capacity assessment model and a first group of human-water mutual feedback relationship equations; solves the water environment carrying capacity population and gross domestic product for a preset period based on a water environment carrying capacity assessment model and a second group of human-water mutual feedback relationship equations; and selects the smaller value of the water resources carrying capacity population and GDP for a preset period and the water environment carrying capacity population and gross domestic product for a corresponding period as the result of the comprehensive carrying capacity of water resources and environment based on the wooden barrel principle, thereby realizing the calculation of the water environment carrying capacity threshold, and providing more 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 water resource environment comprehensive carrying capacity measuring device suitable for urban areas, the device comprising:

[0050] A data acquisition module, used to acquire water resource element data, water environment element data and socio-economic element data;

[0051] A carrying capacity assessment model determination module is used to determine a water resource carrying capacity assessment model based on water resource element data, and to determine a water environment carrying capacity assessment model based on water environment element data;

[0052] A human-water mutual feedback relationship fitting module is used to fit the human-water mutual feedback relationship equation group based on water resource element data, water environment element data and social economic element data;

[0053] The comprehensive carrying capacity measurement module is used to solve the comprehensive carrying capacity results of water resources and environment based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water feedback relationship equation group.

[0054] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to execute the method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas according to the first aspect or any corresponding embodiment thereof.

[0055] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being 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 the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 is a flow chart 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 flow chart 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 flow chart 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;

[0060] Figure 4 is a flow chart 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;

[0061] Figure 5 is a comparison diagram between the population that can be carried by the water resources carrying capacity and the actual population in the study area according to an embodiment of the present invention;

[0062] Figure 6 is a comparison diagram between the population that can be carried by the water environment carrying capacity and the actual population in the study area according to an embodiment of the present invention;

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

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

[0065] Fig. 9 is a comparison diagram of the population that can be carried by the comprehensive carrying capacity of the water resources environment in the study area and the actual population according to an embodiment of the present invention;

[0066] Fig.10 is a comparison chart of the GDP that can be carried by the comprehensive carrying capacity of the water resources environment in the study area and the actual GDP according to an embodiment of the present invention;

[0067] Fig.11 is a structural block diagram of a water resource environment comprehensive carrying capacity metering device applicable to urban areas according to an embodiment of the present invention;

[0068] Fig.12 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection 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 a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0071] In this embodiment, a method for measuring the comprehensive carrying capacity of water resources and environment in urban areas is provided, which can be used in computers and servers. Figure 1 is a flow chart 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. Figure 1 As shown, the process includes the following steps:

[0072] Step S101, obtaining water resource element data, water environment element data and socio-economic element data.

[0073] Specifically, water resource element data, water environment element data and social and economic element data of the target study area during the study period are collected. Among them, water resource element data include precipitation, surface water resources, groundwater resources, total water resources, production water consumption of various industries (primary, secondary and tertiary industries), urban and rural residents' living water consumption, ecological water consumption, reuse rate, inflow water volume and other related data; water environment element data include residents' production and living sewage, river inflow pollution, external water pollution, natural degradation of pollutants, sewage treatment reduction, outflow water flow and local water quality standards and other related data; social and economic element data include permanent population, urbanization rate, gross domestic product (GDP) of various industries (primary, secondary and tertiary industries), output value of high-tech industries and other related data. The GDP of each industry includes the GDP of the primary industry, the GDP of the secondary industry and the GDP of the tertiary industry. The gross domestic product is the sum of the gross domestic products of all industries, namely, 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) with the following calculation formula:

[0075]

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

[0077] Step S102, 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.

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

[0079] Step S103, fitting a group of human-water feedback relationship equations based on water resource element data, water environment element data and social economic element data.

[0080] Specifically, the human-water feedback relationship includes: regional human water demand causes water shortages, and water pollutants produced in the process of human production and life increase the vulnerability of regional water supply and water environment protection. Appropriate binary or multivariate regression equations can be selected and fitted according to water resource element data, water environment element data and socio-economic element data to obtain the human-water feedback relationship equations.

[0081] Step S104, solving the comprehensive carrying capacity result of water resources environment based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water feedback relationship equation group.

[0082] Specifically, based on the equation group of the mutual feedback relationship between human and water, combined with the water resources carrying capacity assessment model and the water environment carrying capacity assessment model, the two dimensions of water quantity and water quality are integrated to construct a measurement model of the comprehensive carrying capacity of water resources and environment, and quantitatively solve the maximum population and GDP scale that can be carried by the comprehensive carrying capacity of water resources and environment in the study area.

[0083] The present embodiment provides a method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas. The method determines a water resources carrying capacity assessment model based on water resources element data, and determines a water environment carrying capacity assessment model based on water environment element data; obtains a group of equations for the human-water mutual feedback relationship based on the water resources element data, the water environment element data and the socio-economic element data; and constructs a water resources and environment comprehensive carrying capacity measurement model by combining the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water mutual feedback relationship equation group. The method can quantitatively solve the results of the comprehensive carrying capacity of water resources and environment in the study area based on the human-water mutual feedback relationship, the integrated water quantity and the water quality, that is, the maximum population and GDP scale that can be carried. The method solves the problem that it is difficult to reasonably quantify the carrying threshold of the comprehensive carrying capacity of water resources and environment, and can provide 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 in urban areas is provided, which can be used in computers, servers, etc. Figure 2 is a flow chart 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. Figure 2 As shown, the process includes the following steps:

[0085] Step S201, obtain water resource element data, water environment element data and social economic element data. Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0086] Step S202: 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.

[0087] Specifically, the above step S202 includes:

[0088] Step S2021, determining a water resource carrying capacity assessment model based on water resource element data.

[0089] In some optional implementations, the water resource element data includes surface water resources, groundwater resources, available transit water, production water, domestic water and ecological water; the above step S2021 includes:

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

[0091] Step a2, determining 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 Indicates the actual water consumption; W industry , W domestic , W ecological They are production water consumption, domestic water consumption, and ecological water consumption, in billion m 3 ; W primary , W secondary , W tertiary The units are the production water of the first, second and third industries, in billion m 3 ;WC domestic WR domestic They are respectively the domestic water consumption of urban residents and the domestic water consumption of rural residents, in billion m 3 .

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

[0097] Specifically, the actual water consumption W use Multiply by the reuse rate rw to calculate the wastewater reuse amount W ruse .

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

[0099] Specifically, the surface water resources W surface , Groundwater resources W ground Multiply by the corresponding empirical coefficient to get the local water resource availability W local .

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

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

[0102]

[0103] Among them, the total amount of available water resources W capacity The available water resources W local , Available transit water volume W transit And the amount of wastewater reuse W ruse Together they constitute; W transit It indicates the amount of water available in the study area according to the water withdrawal permit of the Ministry of Water Resources. The total amount of available water resources can also be the total amount of available water resources = total amount of water resources * availability rate.

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

[0105] Specifically, the total amount of available water resources W in previous years is compared and analyzed. capacity The actual water consumption W use , obtain the evolution of regional water resources carrying capacity and evaluate the water resources carrying capacity.

[0106] The present embodiment provides a method for measuring the comprehensive carrying capacity of water resources and the environment in urban areas. The method analyzes and evaluates the evolution of water resources carrying capacity through a water resources carrying capacity assessment model, and finally converts the assessment of water resources carrying capacity into a process of solving and comparing the total amount of available water resources and the actual water consumption, thereby quantifying the water resources carrying capacity index. The calculation of the water resources carrying capacity assessment model is simple, which provides a basis for the subsequent calculation of the comprehensive carrying capacity index of the water system.

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

[0108] Specifically, the water environment element data 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 water flow and local water quality standards. The load data such as 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, concentration data and sewage discharge time; the above step S2022 includes:

[0109] Step b1, construct a water environment dynamics model suitable for urban areas based on the sewage load of residents' production and life, the pollution load of rivers, the pollution load of external water transfer, the pollution load of non-point source sources, the natural degradation of pollutants, the reduction of sewage treatment, mass conservation and hydrodynamic theory.

[0110] Specifically, this embodiment takes the entire city as an example, generalizes the entire city into a water tank, ignores the exchange of water pollutants with surrounding cities due to water overflow, seepage, etc., considers that water pollutants in urban areas mainly come from residents' production and living sewage, river inflow, river outflow, non-point source pollution, external water pollution, etc., and also considers the gradual reduction of pollution load through artificial sewage treatment and natural degradation. Based on the principle of mass conservation and hydrodynamics theory, the present invention proposes a water environment dynamics model suitable for water environment carrying capacity in urban areas, and the formula is as follows:

[0111]

[0112] Among them, Q is the flow rate of urban outflow water; C is the pollutant concentration of urban outflow water; t is time; V is the total amount of water resources in the city (total amount of water resources = surface water resources W surface + Groundwater resources W ground - Repeated calculation amount, and the total amount of 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) is the flow rate and concentration corresponding to each water pollution source item, including residents’ production (including secondary and tertiary industries) and domestic sewage, non-point source pollution, river inflow, external water pollution, etc.; Q j , C j (j=n+1,2,…,m) are the flow and concentration 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 concentration of the remaining pollutants. 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 accommodated load based on the water environment dynamics model, the outflow water flow rate within a preset time period and the local water quality standard; and take the residents' production and living sewage load as the actual total sewage load.

[0114] Specifically, the total water pollution load within a preset time period is calculated based on the water environment dynamics model under a preset steady-state emission state. The preset steady-state emission state means 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 condition, formula (6) can be converted into:

[0117]

[0118] Define a new water cycle index E = V / Q, which can represent the water exchange efficiency of water bodies in cities. Substituting the water cycle index E = V / Q into formula (8), we get:

[0119]

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

[0121]

[0122] In an optional implementation, the calculation of the accommodative load in the above step b2 based on the total water pollution load, the outflow water flow rate and the local water quality standard within the preset time period includes:

[0123] Step b21, calculating 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 a preset time period.

[0124] Specifically, according to the function and classification of the water area, in order for the water quality of the local river outflow section to reach or exceed specific standards, the following conditions must be met:

[0125] L out =QCΔt≤QC s Δt(11);

[0126] Among them, C s is the water quality standard limit of the local river outflow section. Substituting formula (10) into formula (11), we get:

[0127]

[0128] make:

[0129]

[0130] Among them, L max is the maximum limit of pollution load on outflow water; L point The sewage load of residents' production (including the secondary and tertiary industries), that is, the actual total sewage load; L sum To divide L point For other sources of water pollution and load reduction,

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

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

[0133] Specifically, the accommodative load is the accommodative sewage load of residents' production and life. point The maximum limit L capacity for:

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

[0135] Among them, L capacity To accommodate the load.

[0136] Step b3, determining the water environment carrying capacity assessment model based on the accommodated load and the actual total sewage load.

[0137] Specifically, the accommodative load L is compared and analyzed based on the accommodative load of residents’ production and living in the water environment over the years. capacity The actual total sewage load L point , obtain the evolution of regional water environment carrying capacity and evaluate the water environment carrying capacity.

[0138] The method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas provided in this embodiment converts the water environment carrying capacity assessment model determined based on water environment factor data and socio-economic factor data into a process of solving and comparing the accommodated load and the actual total sewage load, and quantifies the water environment carrying capacity assessment. It takes into account that water pollutants in urban areas mainly come from sewage discharged from residents' production and life, river inflow, river outflow, non-point source pollution, external water pollution, etc., and also takes into account the gradual reduction of pollution load through artificial sewage treatment and natural degradation, thereby improving the rationality and accuracy of the calculation of the accommodated load and the actual total sewage load.

[0139] Step S203, based on the water resources factor data, water environment factor data and social economic factor data, a group of human-water feedback relationship equations are obtained by fitting. Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0140] Step S204, based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water feedback relationship equation group, solve the water resources and environment comprehensive carrying capacity results. Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0141] 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 assessment model based on water resources element data; determining a water environment carrying capacity assessment model based on water environment element data provides conditions for the subsequent construction of a water resources and environment comprehensive carrying capacity measurement model.

[0142] In this embodiment, a method for measuring the comprehensive carrying capacity of water resources and environment in urban areas is provided, which can be used in computers, servers, etc. Figure 3 is a flow chart 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. Figure 3 As shown, the process includes the following steps:

[0143] Step S301, obtain water resource element data, water environment element data and social economic element data. Figure 2 Step S201 of the illustrated embodiment will not be described in detail here.

[0144] Step S302: Determine 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. Figure 2 Step S202 of the illustrated embodiment will not be described in detail here.

[0145] Step S303, fitting a group of human-water feedback relationship equations based on water resource element data, water environment element data and social economic element data.

[0146] Specifically, we first select a suitable set of binary or multivariate regression equations, fit them based on historical data of water resources elements, water environment elements and socio-economic elements, use the least squares method to estimate unknown parameters, and determine the quantitative human-water feedback relationship equation set.

[0147] The formula for binary or multiple regression equations 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, and w5 represent the unknown parameters to be fitted respectively.

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

[0151] Assume (x, y) is a pair of observations (observations refer to historical observations over a period of time, and historical observations are derived from water resources data, water environment data, and socio-economic data), and x = [x1, x2, …, x m ] T ∈R n , which satisfies the following theoretical function:

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

[0153] Where w=[w1,w2,…,w n ] T is an unknown parameter.

[0154] In order to find the optimal estimate of the unknown parameter w of the function f(x,w), for a given m groups (usually m>n) of observation data, solve the objective function:

[0155]

[0156] Among them, 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 include the number of permanent residents, the urbanization rate, the gross domestic product of each industry, and the value of high-tech industries; the human-water mutual feedback relationship equation group includes the first human-water mutual feedback relationship equation group; the above step S303 includes:

[0158] Step S3031, based on precipitation, water consumption of primary industry, water consumption of secondary industry, water consumption of tertiary industry, 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, number of permanent residents, urbanization rate, gross domestic product of each industry and value of high-tech industry, the first group of human-water feedback relationship equations is fitted.

[0159] Specifically, based on precipitation, water consumption of the primary industry, water consumption of the secondary industry, water consumption of the tertiary industry, 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, number of permanent residents, urbanization rate, gross domestic product of each industry and value of high-tech industries, the specific formula of the first human-water feedback relationship equation group is fitted as follows:

[0160]

[0161]

[0162] PC = P × c (23);

[0163] PR = P × (1-c) (24);

[0164] Where pre is precipitation, unit is mm; T is the regional technological level. This embodiment uses the high-tech industry output value index to represent the regional technological level, unit is 100 million yuan; GDP primary , GDP secondary , GDP tertiaryare the GDP of the primary, secondary and tertiary industries respectively, in 100 million yuan; WC per is the per capita domestic water consumption of urban residents, in L / d (liter / day); WR per is the per capita domestic water consumption of rural residents, in L / d; PC is the permanent urban population, in ten thousand people; PR is the permanent rural population, in ten thousand people; P is the permanent population, in ten thousand people; c is the urbanization rate, in %.

[0165] The water environment factor data also include the discharge of domestic sewage from production by residents, the discharge of domestic sewage from urban residents, the discharge coefficient of domestic sewage from urban residents, the discharge of wastewater from production by the secondary industry, the discharge of wastewater from production by the tertiary industry, the discharge coefficient of wastewater from the secondary and tertiary industries, the discharge concentration of wastewater, the reduction load of wastewater treatment, the discharge concentration of treated wastewater and the non-point source pollution load; the socio-economic factor data also include the GDP of the primary industry and the area of ​​built-up areas at the end of the year; the human-water mutual feedback relationship equation group also includes the second human-water mutual feedback relationship equation group; the above step S303 also includes:

[0166] Step S3032, based on the discharge of domestic sewage from residents, the discharge of domestic sewage from urban residents, the discharge coefficient of domestic sewage from urban residents, the discharge of wastewater from the secondary industry, the discharge of wastewater from the tertiary industry, the discharge coefficients of wastewater from the secondary and tertiary industries, the concentration of wastewater, the reduction load of wastewater treatment, the discharge concentration of treated wastewater, the load of non-point source pollution, 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 number of permanent residents, the urbanization rate, the gross domestic product of the primary industry, the value of high-tech industries and the area of ​​built-up areas at the end of the year, the second set of human-water feedback relationship equations is obtained by fitting.

[0167] Specifically, based on the discharge of domestic sewage from residents, the discharge of domestic sewage from urban residents, the discharge coefficient of domestic sewage from urban residents, the discharge of wastewater from the secondary industry, the discharge of wastewater from the tertiary industry, the discharge coefficient of wastewater from the secondary and tertiary industries, the concentration of wastewater discharged, the reduction load of wastewater treatment, the discharge concentration of treated wastewater, the load of non-point source pollution, 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 number of permanent residents, the urbanization rate, the gross domestic product of the primary industry, the value of high-tech industries and the area of ​​built-up areas at the end of the year, the specific formula of the second group of human-water feedback relationship equations 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] Among them, D point The amount of sewage discharged from residential production (including secondary and tertiary industries) and domestic life, in tons; DC domestic is the discharge of urban domestic sewage, in 10,000 tons; pc is the discharge coefficient of urban domestic sewage, dimensionless; D secondary , D tertiary are the wastewater discharge of the secondary and tertiary industries, in 10,000 tons; pi is the wastewater discharge coefficient of the secondary and tertiary industries, dimensionless; sw is the wastewater treatment rate, in %; L point It is the sewage load of residents’ production and life, unit is kg; C nsw It is the sewage discharge concentration, unit is mg / L (milligrams per liter); L sw The reduction of wastewater treatment load, unit: kg; C sw It is the discharge concentration of the treated sewage, 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, solving the comprehensive carrying capacity result of water resources environment based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water feedback relationship equation group.

[0176] Specifically, the two dimensions of water quantity and water quality are integrated. On the basis of water resources carrying capacity and water environment carrying capacity, the "barrel principle" is applied to the integration of the comprehensive carrying capacity of water resources and environment. The smaller value of the water resources carrying capacity and water environment carrying capacity in each period is taken as the lower envelope to constitute the comprehensive carrying capacity of water resources and environment at the urban scale.

[0177] The above step S304 includes:

[0178] Step S3041, based on the water resources carrying capacity assessment model and the first human-water feedback relationship equation group, solve the water resources carrying capacity population and gross domestic product for a preset period.

[0179] Specifically, by combining formulas (2) to (5) with formulas (19) to (24), we can obtain the population that water resources can carry and the gross domestic product, where the relationship between population and GDP is determined by the actual per capita GDP of the year, and the remaining unknown variables such as the proportion of GDP of the primary, secondary and tertiary industries and the urbanization rate all use the actual values ​​of the year. The comparison chart of the population that water resources carrying capacity can carry and the actual population in the study area and the comparison chart of the GDP that water resources carrying capacity can carry and the actual GDP in the study area are shown as follows: Figure 5 and Figure 7 shown.

[0180] Step S3042, based on the water environment carrying capacity assessment model and the second human-water feedback relationship equation group, solve the population and gross domestic product that the water environment can carry during a preset period.

[0181] Specifically, the population and GDP that the water environment can carry are obtained by combining formula (13), formula (15) and formula (25) to formula (31). The comparison chart of the population that the water environment carrying capacity can carry and the actual population in the study area and the comparison chart of the GDP that the water environment carrying capacity can carry and the actual GDP in the study area are as follows: Figure 6 and Figure 8 shown.

[0182] Step S3043, based on the wooden barrel principle, select 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 a corresponding period as the result of the comprehensive carrying capacity of the water resources environment.

[0183] Specifically, based on the principle of the wooden barrel, the smaller value of the population that can be carried by the water resources carrying capacity and the population that can be carried by the water environment carrying capacity in each period is taken as the final result of the comprehensive carrying capacity and the GDP; based on the principle of the wooden barrel, the smaller value of the GDP that can be carried by the water resources carrying capacity and the water environment carrying capacity in each period is taken as the final result of the comprehensive carrying capacity and the GDP. The comparison chart of the population that can be carried by the comprehensive carrying capacity of the water resources and environment in the study area and the comparison chart of the GDP that can be carried by the comprehensive carrying capacity of the water resources and environment in the study area and the actual GDP are shown in the figure below. Fig. 9 and Fig.10 shown.

[0184] The method for measuring the comprehensive carrying capacity of water resources and environment applicable to urban areas provided in this embodiment is based on fitting the first human-water mutual feedback relationship equation group based on water resources element data and socio-economic element data; and the second human-water mutual feedback relationship equation group is fitted based on water environment element data, water resources element data and socio-economic element data. Starting from the mutual feedback relationship between people and water, the first human-water mutual feedback relationship equation group and the second human-water mutual feedback relationship equation group suitable for the water resources environment in urban areas are determined, which provides conditions for solving the comprehensive carrying capacity of water resources and environment results, and solves the water resources carrying capacity population and GDP in a preset period based on the water resources carrying capacity assessment model and the first human-water mutual feedback relationship equation group; solves the water environment carrying capacity population and GDP in a preset period based on the water environment carrying capacity assessment model and the second human-water mutual feedback relationship equation group; and integrates the two aspects of water resources carrying capacity and water environment carrying capacity, and selects the smaller value of the water resources carrying capacity population and GDP in a preset period and the water environment carrying capacity population and GDP in the corresponding period as the comprehensive carrying capacity result of water resources and environment based on the barrel principle, which realizes the quantitative calculation of the threshold of the comprehensive carrying capacity of water resources and environment, and can provide 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 present invention, Figures 4 to 10 , taking a certain city as a case area, taking 2010-2020 as the research period, and taking the total phosphorus index as an example for water environment calculation, the method for measuring the comprehensive carrying capacity of water resources environment applicable to urban areas provided by the present invention is further described in detail, such as Figure 4 As shown, the specific steps include:

[0186] Step 1. Data collection and pre-processing: Collect water resource element data, water environment element data, and socio-economic element data in the target study area during the study period. Among them, water resources, water environment and other related data are derived from the municipal water resources bulletin, provincial water resources bulletin, municipal environmental quality bulletin, etc. Socio-economic data are derived from the city's "Statistical Yearbook", "Certain Statistical Bulletin", etc. The available transit water volume data is derived from various water abstraction permit decisions announced by the River Basin Committee of the Ministry of Water Resources, and the water 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] Wherein, Lnon is the estimated non-point source pollutant load; E k is the output coefficient of the kth pollution source; A k is the number of the kth pollution source; l is the number of pollution source types; P is the amount of nutrients input by rainfall.

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

[0190] The water resource carrying capacity assessment takes into account the available local water resources, the amount of water that can be taken in transit, and the amount of wastewater reused. The total amount of local water resources available is obtained by multiplying the amount of surface water resources and groundwater resources by the corresponding empirical coefficients; the amount of water that can be taken in transit is obtained by sorting out the various water withdrawal permits published by the basin committee; the amount of wastewater reused is obtained by multiplying the total amount of water used by the reuse rate of each year. The specific formula is 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] Where: W use Indicates the actual water consumption; W industry , W domestic , W ecological They are production water consumption, domestic water consumption, and ecological water consumption, in billion m 3 ; W primary , W secondary , W tertiary The units are the production water of the first, second and third industries, in billion m 3 ;WC domestic WR domestic They are respectively the domestic water consumption of urban residents and the domestic water consumption of rural residents, in billion m 3 ; W use Indicates the actual water consumption; W industry , W domestic , W ecological They are production water consumption, domestic water consumption, and ecological water consumption, in billion m 3 ; W primary , W secondary , W tertiary The units are the production water of the first, second and third industries, in billion m 3 ;WC domestic WR domesticThey are respectively the domestic water consumption of urban residents and the domestic water consumption of rural residents, in billion m 3 .

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

[0196]

[0197] Among them, the total amount of available water resources W capacity The available water resources W local , Available transit water volume W transit And the amount of wastewater reuse W ruse Together, it is composed of surface water resources W surface , Groundwater resources W ground Multiply by the corresponding empirical coefficient to get the local water resource availability W local ; W transit It indicates the amount of transit water available in the study area, which is compiled based on the water abstraction permits from the Ministry of Water Resources.

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

[0199] Table 1

[0200]

[0201]

[0202] The water environment carrying capacity assessment generalizes the entire urban area into a water tank, considering that the water pollutants in the urban area mainly come from the sewage discharge of residents' production and life, river inflow, river outflow, and non-point source pollution. It also considers the gradual reduction of pollution load through artificial sewage treatment and natural degradation. Since the city has no large-scale external water source, the impact of external water pollution is ignored. Water quality indicators represent the types and quantities of impurities in the water. It is a specific measurement scale for judging the degree of water pollution. Common indicators include odor, water temperature, turbidity, pH value, conductivity, soluble solids, suspended solids, total phosphorus, total nitrogen, total organic carbon (TOC), dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total bacteria, coliform group, etc. The total phosphorus of the present invention is calculated as an example. The specific formula obtained after derivation is as follows:

[0203] L max =QC s Δt

[0204] L point =Q1C1Δt

[0205]

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

[0207] Where Q is the outflow flow of the city; C s is the water quality standard limit of the local river outflow section; t is time; V is the total amount of water resources in the city; Q i , C i (i=1,2,…,n) is the flow rate and concentration corresponding to each water pollution source item, including residents’ production (including secondary and tertiary industries) and domestic sewage, non-point source pollution, river inflow, external water pollution, etc.; Q j , C j (j=n+1,2,…,m) is the flow rate and concentration corresponding to each water pollution reduction item such as sewage treatment; K is the natural degradation coefficient; E=V / Q is the water cycle index; L max is the maximum limit of pollution load on outflow water; L point The sewage load of residents' production (including the secondary and tertiary industries), that is, the actual total sewage load; L sum To divide L point Other sources of water pollution and load reduction; L point The load that can be accommodated is the load of sewage discharge from residents' production and life.

[0208] By comparing and analyzing the sewage load of residents' production and life that the water environment can accommodate over the years and the actual total sewage load, the evolution 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: Sorting out the mutual feedback relationship between people and water: Based on historical data such as water resource factor data, water environment factor data, and social and economic factor data, summarize the change patterns among various factors and conduct qualitative analysis on the causal relationship among various factors; select appropriate binary or multivariate regression equations, and use R software (R software is a computer software used for statistical analysis, drawing language and operating environment) to fit the relationship between various factors based on historical data, estimate unknown parameters based on the least squares method, and determine the quantitative mutual feedback relationship equation between people and water. The values ​​of some parameters involved refer to relevant planning standards, such as C nsw is the sewage discharge concentration, which is 8 mg / L according to the Water Quality Standard for Sewage Discharge into Urban Sewers (GB_T 31962-2015); C swis the discharge concentration of the treated sewage, and refers to the Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB 18918-2002) to take 0.5 mg / L; this embodiment takes total phosphorus as an example for calculation. According to the water area function and classification standard, since the river section passing through the city belongs to Class III of the Surface Water Environmental Quality Standard (GB3838-2002), in order to make the water quality of the outflow city boundary section reach or exceed Class III standards, the water quality standard limit C s Take 0.2mg / L.

[0212] The specific formula of the first person-water mutual feedback relationship equation group obtained by fitting the water resources factor data and the socio-economic factor data is as follows:

[0213]

[0214] PC = P × c (23);

[0215] PR = P × (1-c) (24);

[0216] Where pre is precipitation, unit is mm; T is the regional technological level. This embodiment uses the high-tech industry output value index to represent the regional technological level, unit is 100 million yuan; GDP primary , GDP secondary , GDP tertiary are the GDP of the primary, secondary and tertiary industries respectively, in 100 million yuan; WC per is the per capita domestic water consumption of urban residents, taking the empirical value of 150L / d (liter / day); WR per is the per capita domestic water consumption of rural residents, taking the empirical value as 100L / d; PC is the permanent urban population, in ten thousand people; PR is the permanent rural population, in ten thousand people; P is the permanent population, in ten thousand people; c is the urbanization rate, in %.

[0217] The specific formula of the second human-water mutual feedback relationship equation group obtained by fitting the water environment factor data, water resource factor data and socio-economic factor 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] Among them, D point The amount of sewage discharged from residential production (including secondary and tertiary industries) and domestic life, in tons; DC domestic is the discharge of urban domestic sewage, in 10,000 tons; pc is the discharge coefficient of urban domestic sewage, dimensionless; D secondary , D tertiary are the wastewater discharge of the secondary and tertiary industries, in 10,000 tons; pi is the wastewater discharge coefficient of the secondary and tertiary industries, dimensionless; sw is the wastewater treatment rate, in %; L point It is the sewage load of residents' production and life, unit is kg; C nsw It is the sewage discharge concentration, unit is mg / L (milligrams per liter); L sw The reduction of wastewater treatment load, unit: kg; C sw It is the discharge concentration of the treated sewage, 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 water resources and environment: Based on the mutual feedback relationship between people and water, combined with the water resources carrying capacity and water environment carrying capacity assessment models, the two dimensions of water quantity and water quality are integrated to construct a measurement model for the comprehensive carrying capacity of water resources and environment, and quantitatively solve the maximum population and GDP scale that the comprehensive carrying capacity of water resources and environment in the study area can bear. The integration of the two dimensions of water quantity and water quality is to apply the "barrel principle" on the basis of the single carrying capacity 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, to form the comprehensive carrying capacity of water resources and environment at the urban scale. The specific calculation steps are:

[0225] 1) Solve formula (2) to formula (5) and formula (19) to formula (24) jointly, where the relationship between population and GDP is determined by the actual per capita GDP of the 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 based on the actual values ​​of the year, and the population P that water resources can carry in each year is obtained. W GDP W ; The comparison chart of the population that the water resources carrying capacity can carry and the actual population in the study area and the comparison chart of the GDP that the water resources carrying capacity can carry and the actual GDP in the study area are as follows: Figure 5 and Figure 7 shown.

[0226] 2) Solve formula (13), formula (15) and formula (25) to formula (31) jointly, where the relationship between population and GDP is determined by the actual per capita GDP of the year, and the proportion of GDP of the primary, secondary and tertiary industries and the urbanization rate and other unknown variables are all based on the actual values ​​of the year, and the population P that the water environment can carry in each year is obtained. L GDP L ; The comparison chart of the population that the water environment carrying capacity can carry and the actual population in the study area and the comparison chart of the GDP that the water environment carrying capacity can carry and the actual GDP in the study area are as follows Figure 6 and Figure 8 shown.

[0227] 3) Take the smaller value of the population and GDP that can be carried by each item in the water resources carrying capacity and water environment carrying capacity in each year as the final result of the comprehensive carrying capacity. That is, the population P that can be carried by the comprehensive carrying capacity of water resources and environment WL =min(P W ,P L ), the population GDP that can be supported by the comprehensive carrying capacity of water resources and environment WL =min(GDP W ,GDP L The comparison chart of the population that the comprehensive carrying capacity of water resources and environment in the study area can carry and the actual population, and the comparison chart of the GDP that the comprehensive carrying capacity of water resources and environment in the study area can carry and the actual GDP are shown as follows: Fig. 9 and Fig.10 shown.

[0228] In the present embodiment, a water resource environment comprehensive carrying capacity metering device suitable for urban areas is also provided, and the device is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions thereof will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and contemplated.

[0229] This embodiment provides a water resource environment comprehensive carrying capacity measurement device suitable for urban areas, such as Fig.11 As shown, including:

[0230] The data acquisition module 1101 is used to acquire water resource element data, water environment element data and social economic element data.

[0231] The carrying capacity assessment model determination module 1102 is used to determine a water resource carrying capacity assessment model based on water resource element data, and to determine a water environment carrying capacity assessment model based on water environment element data.

[0232] The human-water mutual feedback relationship fitting module 1103 is used to fit the human-water mutual feedback relationship equation group based on the water resource element data, the water environment element data and the social economic element data.

[0233] The comprehensive carrying capacity measurement module 1104 is used to solve the comprehensive carrying capacity of water resources and environment based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water feedback relationship equation group.

[0234] In some optional implementations, the bearing capacity assessment model determination module 1102 includes:

[0235] A first assessment model determination unit, used to determine a water resources carrying capacity assessment model based on water resources element data;

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

[0237] In some optional implementations, the water resource element data includes the amount of surface water resources, the amount of groundwater resources, the total amount of local water resources available, the amount of available transit water, the amount of production water, the amount of domestic water and the amount of ecological water; the first assessment model determination unit includes:

[0238] The water acquisition subunit is used to obtain surface water resources, groundwater resources, available transit water, production water, domestic water and ecological water from 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 amount determination subunit is used to determine the wastewater reuse amount based on actual water consumption and a preset reuse rate.

[0241] The local water resource availability determination subunit is used to determine the local water resource availability 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 available local water resources, the available transit water and the amount of wastewater reuse.

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

[0244] In some optional implementations, the water environment factor data 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 water flow and the local water quality standard; 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 by flow, concentration data and sewage discharge time; the second assessment model determination unit includes:

[0245] The model building subunit is used to build a water environment dynamics model suitable for urban areas based on the sewage load of residents' production and life, the pollution load of rivers, the pollution load of external water transfer, the pollution load of non-point source sources, the natural degradation of pollutants, the reduction of sewage treatment, mass conservation and hydrodynamic theory.

[0246] The accommodated load calculation subunit is used to calculate the accommodated load based on the water environment dynamics model, the outflow water flow rate within a preset time period and the local water quality standard; and take the residents' production and living sewage load as the actual total sewage load.

[0247] The water environment carrying capacity assessment model determination subunit is used to determine the water environment carrying capacity assessment model based on the accommodated load and the actual total sewage discharge load.

[0248] In some optional implementations, 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 socio-economic element data includes the number of permanent residents, the urbanization rate, the GDP, and the value of high-tech industries; the human-water mutual feedback relationship equation group includes the first human-water mutual feedback relationship equation group; the water environment element data also includes the production and living sewage discharge of residents, the domestic sewage discharge of urban residents, the domestic sewage discharge coefficient of urban residents, the production sewage discharge of the secondary industry, the production 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 of the treated sewage, and the non-point source pollution load; the socio-economic element data also 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 mutual feedback relationship equation group also includes a second human-water mutual feedback relationship equation group;

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

[0251] The first fitting unit is used to fit the first set of human-water feedback relationship equations based on precipitation, water consumption of primary industry production, water consumption of secondary industry production, water consumption of 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, number of permanent residents, urbanization rate, gross domestic product of each industry and value of high-tech industry.

[0252] The second fitting unit is used to obtain the second set of human-water feedback relationship equations based on the discharge of domestic and industrial sewage from residents, the discharge of domestic sewage from urban residents, the discharge coefficient of domestic sewage from urban residents, the discharge of wastewater from the secondary industry, the discharge of wastewater from the tertiary industry, the discharge coefficients of the secondary and tertiary industries, the concentration of sewage, the reduction load of sewage treatment, the discharge concentration of treated sewage, 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 number of permanent residents, the urbanization rate, the gross domestic product of the primary industry, the value of high-tech industries and the area of ​​built-up areas at the end of the year.

[0253] In some optional implementations, the comprehensive bearing capacity measurement module 1104 includes:

[0254] The first solving unit is used to solve the population and gross domestic product that can be carried by water resources in a preset period based on the water resources carrying capacity assessment model and the first human-water feedback relationship equation group.

[0255] The second solving unit is used to solve the population and gross domestic product that the water environment can carry during a preset period based on the water environment carrying capacity assessment model and the second human-water feedback relationship equation group.

[0256] A selection unit is used to select the smaller value of the water resources carrying capacity and GDP in a preset period and the water environment carrying capacity and GDP in a corresponding period as the comprehensive carrying capacity result of the water resources environment based on the barrel principle.

[0257] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0258] The water resources environment comprehensive carrying capacity metering device suitable for urban areas in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes 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 Fig.11 The water resources environment comprehensive carrying capacity measuring device shown is suitable for urban areas.

[0260] See also Fig.12 , Fig.12 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Fig.12 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional 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 group of blade servers, or a multi-processor system). Fig.12 A processor 10 is taken as an example.

[0261] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0262] 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 embodiment.

[0263] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0264] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0265] The computer device also 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. Fig.12 The example of connecting through bus is taken in the following.

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

[0267] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. 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. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0268] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all 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; The comprehensive carrying capacity of water resources and environment is solved based on the water resources carrying capacity assessment model, water environment carrying capacity assessment model and the human-water feedback relationship equation group.

2. The method according to claim 1, characterized in that 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; A water environment carrying capacity assessment model is determined based on the water environment element data.

3. The method according to claim 2, characterized in that The water resource element data include surface water resources, groundwater resources, available transit water, production water, domestic water and ecological water; 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.

4. The method according to claim 3, characterized in that The water environment factor data 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 water flow 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, 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.

5. The method according to claim 4, 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.

6. The method according to claim 4, characterized in that 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 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.

7. The method according to claim 6, characterized in that The water environment factor data also 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: The second set of human-water feedback relationship equations is obtained based on the discharge of residential production and domestic sewage, urban residents' domestic sewage, urban residents' domestic sewage discharge coefficient, secondary industry production sewage, tertiary industry production sewage, secondary and tertiary industry sewage discharge coefficients, 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 GDP, high-tech industry value and built-up area at the end of the year.

8. The method according to claim 6, characterized in that 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.

9. 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; The comprehensive carrying capacity measurement module is used to solve the comprehensive carrying capacity results of water resources and environment based on the water resources carrying capacity assessment model, the water environment carrying capacity assessment model and the human-water feedback relationship equation group.

10. 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 8 by executing the computer instructions.

11. 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 8.

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