Method and device for evaluating comprehensive bearing capacity of water system, computer equipment and medium

Abstract

The invention relates to the technical field of bearing capacity of a water system in social hydrology, and discloses a comprehensive bearing capacity evaluation method and device for a water system, computer equipment and a medium, and the method comprises the steps: obtaining water resource element data and water environment element data; determining a water resource bearing capacity index based on the water resource element data; determining a water environment bearing capacity index based on the water environment element data; calculating a comprehensive bearing capacity index of the water system based on the water resource bearing capacity index and the water environment bearing capacity index; and evaluating the comprehensive bearing capacity of the water system based on the comprehensive bearing capacity index of the water system. According to the method, the influence of the mutual relation between the human social economy and the natural water system on the bearing capacity of the water system is considered, and the two dimensions of water volume and water quality are integrated, so that the evaluation accuracy of the bearing capacity of the water system is improved; the problem of inaccurate evaluation of the bearing capacity of the water system caused by neglecting the human-water mutual feedback relationship or not comprehensively considering the water resource and the water environment is solved.

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, device, computer equipment and medium for evaluating the comprehensive carrying capacity of a water system. 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 degree of 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 urban water environment problems such as urban black and odorous water bodies and urban non-point source pollution have occurred frequently. Overload of water resources or water environment 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 key factor in effectively solving urban resource and environmental problems and a yardstick for guiding urban sustainable development. It is urgent to explore the sustainable state of water resource development and utilization through the study of carrying capacity. Looking back at previous studies, traditional carrying capacity assessment is generally based on mathematical statistical methods to calculate carrying capacity. These methods blur the concept of carrying capacity and do not consider the relationship between carrier and carrying capacity, making it difficult to establish a reasonable and accurate water resource carrying capacity assessment method. As a spatial carrier of frequent human activities, cities are key nodes for the interaction between natural resources and socio-economic elements. In the current context of urbanization, the development and utilization of water resources involves an increasingly complex relationship between people and water, which further increases the challenge of solving the problem of water system carrying capacity. However, there have been few studies on the carrying capacity of water systems in urban areas in the past, lacking exploration of the mutual feedback relationship between people and water, and having certain limitations in the comprehensive integration of water quantity and water quality. Therefore, the existing methods are inaccurate in assessing the carrying capacity of water systems. Summary of the invention

[0004] In view of this, the present invention provides a method, device, computer equipment and medium for evaluating the comprehensive carrying capacity of a water system to solve the problem of inaccurate evaluation of the carrying capacity of a water system due to ignoring the mutual feedback relationship between people and water or failing to comprehensively consider water resources and water environment.

[0005] In a first aspect, the present invention provides a method for evaluating the comprehensive carrying capacity of a water system, the method comprising:

[0006] Obtain water resource element data and water environment element data;

[0007] Determine the water resources carrying capacity index based on water resources element data;

[0008] Determine the water environment carrying capacity index based on water environment element data;

[0009] Calculate the comprehensive carrying capacity index of the water system based on the water resources carrying capacity index and the water environment carrying capacity index;

[0010] The comprehensive carrying capacity of the water system is evaluated based on the comprehensive carrying capacity index of the water system.

[0011] The method for evaluating the comprehensive carrying capacity of a water system provided by the present invention takes into account the principle of mutual feedback between human beings and water, obtains water resource element data and water environment element data, and determines a water resource carrying capacity index based on the water resource element data; determines a water environment carrying capacity index based on the water environment element data; calculates a water system comprehensive carrying capacity index based on the water resource carrying capacity index and the water environment carrying capacity index; and evaluates the comprehensive carrying capacity of the water system based on the water system comprehensive carrying capacity index. Since the influence of the mutual relationship between human social economy and natural water system on the carrying capacity of the water system is taken into account, the two dimensions of water resources and water environment are integrated, thereby improving the accuracy of the evaluation of the carrying capacity of the water system, solving the problem of inaccurate evaluation of the carrying capacity of the water system caused by ignoring the mutual feedback relationship between human beings and water or failing to comprehensively consider water resources and water environment, and providing more objective scientific support for guiding water resource management and water environment protection in urban areas.

[0012] In an optional implementation, the water environment factor data includes non-point source pollution load, wherein the non-point source pollution load is calculated using an Export Coefficient Model (ECM model for short), and the calculation formula is as follows:

[0013]

[0014] Among them, L npoint is the non-point source pollution 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; PI is the amount of nutrients input by rainfall.

[0015] The water system comprehensive carrying capacity assessment method provided by the present invention comprises water environment element data including non-point source pollution load, the water environment element data comprises comprehensive data, and the non-point source pollution load calculated by using the output coefficient model is easy to calculate and the result is accurate.

[0016] In an optional implementation, before determining the water resource carrying capacity index based on the water resource element data, the water system comprehensive carrying capacity assessment method further includes:

[0017] Obtain data on social and economic factors, and calculate the degree of coupling coordination between the human and water systems based on water resources factor data, water environment factor data, and social and economic factor data.

[0018] In an optional implementation, calculating the degree of human-water system coupling coordination based on water resource element data, water environment element data, and socio-economic element data includes:

[0019] Obtaining socio-economic factor data, selecting multi-year sample data of multiple indicators within a preset time period from water resource factor data, water environment factor data and socio-economic factor data;

[0020] The information entropy of each indicator is calculated using the entropy weight method;

[0021] Determine the weight of each indicator based on the information entropy of each indicator, and calculate the score of each preset subsystem based on each indicator weight;

[0022] Calculating a comprehensive score of the plurality of preset subsystems based on the score of each preset subsystem;

[0023] The degree of human-water system coupling coordination is calculated based on the score of each preset subsystem and the comprehensive score of multiple preset subsystems.

[0024] The method for evaluating the comprehensive carrying capacity of a water system provided by the present invention selects multiple sample data of a preset time period from water resource element data, water environment element data and socio-economic element data, summarizes the changing rules among the sample data, and finally calculates the coupling coordination degree of the human-water system, and qualitatively analyzes the mutual feedback relationship between human and water, thus providing theoretical support for the subsequent evaluation of the comprehensive carrying capacity of the water system.

[0025] 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;

[0026] The water resources carrying capacity index determined based on water resources element data includes:

[0027] Determine actual water consumption based on production water consumption, domestic water consumption and ecological water consumption;

[0028] Determine the amount of wastewater reuse based on actual water consumption and preset reuse rate;

[0029] Determine the availability of local water resources based on the amount of surface water resources and groundwater resources;

[0030] 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;

[0031] The water resources carrying capacity index is determined based on actual water consumption and the total amount of available water resources.

[0032] The water system comprehensive carrying capacity assessment method provided by the present invention analyzes and evaluates the evolution of water resource carrying capacity, and finally converts the water resource carrying capacity index into a process for solving the total available water resource and actual water consumption, thereby quantifying the water resource carrying capacity. The calculation of the water resource carrying capacity index is simple, and a basis is provided for the subsequent calculation of the water system comprehensive carrying capacity index.

[0033] In an optional implementation, the water environment factor data also includes 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 from the flow data, concentration data and sewage discharge time;

[0034] The water environment carrying capacity index is determined based on water environment factor data and socio-economic factor data, including:

[0035] A water environment dynamics model 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 sources, the natural degradation of pollutants, the reduction of sewage treatment, mass conservation and hydrodynamic theory;

[0036] The accommodated load is calculated based on the water environment dynamics model, the outflow water flow within a preset time period and the local water quality standards; the sewage load of residents' production and life is taken as the actual total sewage load; the water environment carrying capacity index is determined based on the accommodated load and the actual total sewage load.

[0037] The water system comprehensive carrying capacity assessment method provided by the present invention converts the water environment carrying capacity index determined based on water environment factor data and socio-economic factor data into a process for solving the accommodated load and the actual total sewage load, digitizes the water environment carrying capacity index, and is simple to calculate, providing a basis for the subsequent calculation of the water system comprehensive carrying capacity index.

[0038] 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:

[0039] 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;

[0040] 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.

[0041] The comprehensive carrying capacity assessment method of the water system provided by the present invention calculates the maximum limit of the pollution load of the outflow water body based on the outflow water body flow rate and the local water quality standard within a preset time period; and determines the accommodative load based on the water environment dynamics model, the maximum limit of the pollution load of the outflow water body, and other water pollution sources and reduction loads other than the sewage load of residents' production and life. Considering that the water pollutants in the urban area mainly come from the sewage load of residents' production and life, inbound pollution from rivers, non-point source pollution, external water pollution, etc., it also considers the gradual reduction of the pollution load through artificial sewage treatment and natural degradation, thereby improving the calculation accuracy of the accommodative load.

[0042] In an optional implementation, calculating the comprehensive carrying capacity index of the water system based on the water resources carrying capacity index and the water environment carrying capacity index includes:

[0043] Calculate the water resources carrying capacity index based on the total available water resources and actual water consumption;

[0044] Calculate the water environment carrying capacity index based on the accommodated load and the actual total sewage load;

[0045] The comprehensive carrying capacity index is calculated based on the water resources carrying capacity index and the water environment carrying capacity index.

[0046] The water system comprehensive carrying capacity assessment method provided by the present invention calculates the water resource carrying capacity index based on the total available water resources and the actual water consumption; calculates the water environment carrying capacity index based on the accommodated load and the actual total sewage load; calculates the comprehensive carrying capacity index based on the water resource carrying capacity index and the water environment carrying capacity index, thereby realizing the final calculation of the comprehensive carrying capacity index and providing conditions for the subsequent assessment of the comprehensive carrying capacity of the water system.

[0047] In a second aspect, the present invention provides a device for evaluating the comprehensive carrying capacity of a water system, the device comprising:

[0048] A data acquisition module is used to acquire water resource element data and water environment element data;

[0049] A water resources carrying capacity index determination module, used to determine the water resources carrying capacity index based on water resources element data;

[0050] A water environment carrying capacity index determination module, used to determine the water environment carrying capacity index based on water environment element data;

[0051] A comprehensive carrying capacity index calculation module is used to calculate the comprehensive carrying capacity index of the water system based on the water resources carrying capacity index and the water environment carrying capacity index;

[0052] The comprehensive carrying capacity assessment module is used to assess the comprehensive carrying capacity of the water system based on the comprehensive carrying capacity index of the water system.

[0053] 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 water system comprehensive carrying capacity assessment method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0054] 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 assessing the comprehensive carrying capacity of a water system according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] 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.

[0056] Figure 1 is a schematic flow chart of a method for evaluating the comprehensive carrying capacity of a water system according to an embodiment of the present invention;

[0057] Figure 2 is a flow chart of another method for evaluating the comprehensive carrying capacity of a water system according to an embodiment of the present invention;

[0058] Figure 3 is a flow chart of another method for evaluating the comprehensive carrying capacity of a water system according to an embodiment of the present invention;

[0059] Figure 4 is a flow chart of another method for evaluating the comprehensive carrying capacity of a water system according to an embodiment of the present invention;

[0060] Figure 5 is a diagram showing the calculation result of the coupling coordination degree of human-water system in the study area according to an embodiment of the present invention;

[0061] Figure 6 is a graph showing the annual changes in the comprehensive carrying capacity index of the water system in the study area according to an embodiment of the present invention;

[0062] Figure 7 is a structural block diagram of a device for evaluating the comprehensive bearing capacity of a water system according to an embodiment of the present invention;

[0063] Figure 8 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0064] 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.

[0065] According to an embodiment of the present invention, an embodiment of a method for evaluating the comprehensive carrying capacity of a water system 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.

[0066] In this embodiment, a method for evaluating the comprehensive carrying capacity of a water system is provided, which can be used in computers, servers, etc. Figure 1 is a flow chart of a method for evaluating the comprehensive carrying capacity of a water system according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0067] Step S101, obtaining water resource element data and water environment element data.

[0068] Specifically, water resource element data and water environment element data of the target study area during the study period are collected. Among them, water resource element data include surface water resources, groundwater resources, available transit water, production water, domestic water and ecological water; water environment element data include residents' production and living sewage load, river inflow pollution load, external water pollution load, natural degradation of pollutants, sewage treatment reduction, outflow water flow and local water quality standards; residents' production and living sewage load, river inflow pollution load, external water pollution load can be calculated from flow data, concentration data and sewage discharge time, and non-point source pollution load data is calculated by output coefficient model.

[0069] Step S102, determining the water resource carrying capacity index based on the water resource element data.

[0070] Specifically, water resource carrying capacity refers to the ability of the target research basin or region's own water resources to continuously support the scale of economic and social development and maintain the sustainable development and utilization of water resources. That is, whether the available water resources calculated by the water resource element data can support the production water consumption of various industries (primary, secondary and tertiary industries), the domestic water consumption of urban and rural residents, and the ecological water consumption. Therefore, the water resource carrying capacity index can be calculated based on the total available water resources and the actual water consumption.

[0071] Step S103, determining the water environment carrying capacity index based on the water environment element data.

[0072] Specifically, water environment carrying capacity refers to the maximum capacity of the water body to accommodate sewage and pollutant emissions in the target research basin or region while the water body can continue to be used and maintain a good ecological environment, that is, the maximum capacity of residents' production and living sewage discharge accommodated in the water environment element data. Therefore, the water environment carrying capacity index can be calculated for the accommodated load and the actual total sewage load.

[0073] Step S104, calculating the comprehensive carrying capacity index of the water system based on the water resource carrying capacity index and the water environment carrying capacity index.

[0074] Specifically, the comprehensive carrying capacity of a water system refers to the maximum load it can withstand without causing any damage. It refers to the carrying capacity of the resource endowment and ecological environment in the target research basin or region for the urban population and economic and social activities. The comprehensive carrying capacity index can be used to evaluate the comprehensive carrying capacity of a water system.

[0075] Step S105, evaluating the comprehensive carrying capacity of the water system based on the comprehensive carrying capacity index of the water system.

[0076] Specifically, the comprehensive carrying capacity of the water system is evaluated based on the comprehensive carrying capacity index of the water system. The larger the index is, the greater the corresponding carrying capacity is. When the index is positive, it indicates that the corresponding carrying capacity is in a bearable state, otherwise it indicates that it is in an overloaded state.

[0077] The method for evaluating the comprehensive carrying capacity of a water system provided in the present embodiment takes into account the mutual feedback relationship between man and water by acquiring water resource element data and water environment element data, determines a water resource carrying capacity index based on the water resource element data; determines a water environment carrying capacity index based on the water environment element data; calculates a comprehensive carrying capacity index of a water system based on the water resource carrying capacity index and the water environment carrying capacity index; and evaluates the comprehensive carrying capacity of a water system based on the comprehensive carrying capacity index of a water system. Since the influence of the mutual feedback relationship between man and water on the carrying capacity of a water system is taken into account, two dimensions of water quantity and water quality are integrated, thereby improving the accuracy of the evaluation of the carrying capacity of a water system, solving the problem of inaccurate evaluation of the carrying capacity of a water system caused by ignoring the mutual feedback relationship between man and water or failing to comprehensively consider water resources and water environment, and providing more objective scientific support for guiding water resource management and water environment protection in urban areas.

[0078] In this embodiment, a method for evaluating the comprehensive carrying capacity of a water system is provided, which can be used in computers, servers, etc. Figure 2 is a flow chart of a method for evaluating the comprehensive carrying capacity of a water system according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0079] Step S201, obtaining water resource element data and water environment element data.

[0080] The water environment factor data include non-point source pollution load, which is calculated using the Export Coefficient Model (ECM model) with the following calculation formula:

[0081]

[0082] Among them, L npoint is the non-point source pollution 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; PI is the amount of nutrients input by rainfall.

[0083] Step S202, obtaining social economic factor data, and calculating the degree of coupling coordination of the human-water system based on the water resource factor data, the water environment factor data and the social economic factor data.

[0084] Specifically, based on historical data on water resources, water environment, and social and economic factors, the changing patterns of each factor are summarized, and the causal relationship between each factor is qualitatively analyzed. The data on social and economic factors include population, urbanization rate, GDP of each industry (primary, secondary, and tertiary industries), and output value of high-tech industries.

[0085] like Figure 4 As shown, the above step S202 includes:

[0086] Step S2021, obtaining social and economic factor data, and selecting multi-year sample data of multiple indicators within a preset time period from water resource factor data, water environment factor data and social and economic factor data.

[0087] Specifically, the preset time period is set according to the actual situation and is not specifically limited here. The preset time period of this embodiment is set to multiple years. Multi-year sample data of multiple indicators are selected from water resource element data, water environment element data and socio-economic element data, and multiple indicators include precipitation, total water resources, production water consumption of various industries (primary, secondary and tertiary industries), living water consumption of urban and rural residents, ecological water consumption, water consumption, inflow of water, residents' production and living sewage, non-point source sewage, sewage treatment, population, urbanization rate, GDP of various industries (primary, secondary and tertiary industries), output value of high-tech industries, etc.

[0088] In order to eliminate the dimension, the sample data of each indicator in each year are standardized in the following way:

[0089]

[0090] Where: x ij (i=1,2,…,n;j=1,2,…,m) represents the sample data value of the jth indicator in the i-th year, max(x ij ) and min(x ij ) represent the maximum and minimum values ​​of the sample data in all years respectively; y ij Represents the normalized data value.

[0091] Step S2022, using the entropy weight method to calculate the information entropy of each indicator.

[0092] Specifically, the formula for calculating the information entropy of each indicator using the entropy weight method is as follows:

[0093]

[0094] Where: e j Represents the information entropy of each indicator.

[0095] Step S2023, determining the weight of each indicator based on the information entropy of each indicator, and calculating the score of each preset subsystem based on each indicator weight.

[0096] Specifically, the weight formula of each indicator is determined based on the information entropy of each indicator as follows:

[0097]

[0098] Where: w j represents the weight value of each indicator, and m represents the number of indicators (j=1,2,…,m).

[0099] Calculate the score of the k-th subsystem in the i-th year. In the present invention, the preset subsystems include two subsystems, "people" and "water", so k = 1, 2, where water resources and water environment data constitute the water subsystem. The score of the k-th subsystem in the i-th year is calculated by the following formula:

[0100]

[0101] Among them: U ik It represents the score of the kth (k=1,2) subsystem in the i-th year, and s represents the number of indicators contained in a single subsystem.

[0102] Step S2024: Calculate the comprehensive score of the plurality of preset subsystems based on the score of each preset subsystem.

[0103] Specifically, the formula for calculating the comprehensive score of multiple preset subsystems based on the score of each subsystem is as follows:

[0104]

[0105] Where: R is the comprehensive score of multiple preset subsystems, α k The undetermined coefficient is taken as 1 / h in this embodiment, where h represents the number of included subsystems, and h=2 in this embodiment.

[0106] Step S2025, calculating the coupling coordination degree of the human-water system based on the score of each preset subsystem and the comprehensive score of multiple preset subsystems.

[0107] Specifically, the coupling degree C of the human-water system and its coupling coordination degree D in the i-th year are calculated as follows:

[0108]

[0109] Among them: C is the coupling degree between subsystems, ranging from 0 to 1, which can reflect the degree of interaction between subsystems; D is the coupling coordination degree between all subsystems, ranging from 0 to 1, which can calculate the equilibrium state and coordinated development level between subsystems. The coupling coordination degree of the human-water system can reflect the coupling relationship between man and water.

[0110] Step S203: Determine the water resource carrying capacity index based on the water resource element data. Figure 1 Step S102 of the illustrated embodiment will not be described in detail here.

[0111] Step S204: Determine the water environment carrying capacity index based on the water environment element data. Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0112] Step S205: Calculate the comprehensive carrying capacity index of the water system based on the water resources carrying capacity index and the water environment carrying capacity index. Figure 1 Step S104 of the illustrated embodiment will not be described in detail here.

[0113] Step S206: Evaluate the comprehensive carrying capacity of the water system based on the comprehensive carrying capacity index of the water system. Figure 1 Step S105 of the illustrated embodiment will not be described in detail here.

[0114] The method for evaluating the comprehensive carrying capacity of a water system provided in this embodiment selects multiple sample data of a preset time period from water resource element data, water environment element data, and socio-economic element data, summarizes the changing rules among the sample data, and finally calculates the coupling coordination degree of the human-water subsystem, and qualitatively analyzes the mutual feedback relationship between human and water, thereby providing theoretical support for the subsequent evaluation of the comprehensive carrying capacity of the water system.

[0115] In this embodiment, a method for evaluating the comprehensive carrying capacity of a water system is provided, which can be used in computers, servers, etc. Figure 3is a flow chart of a method for evaluating the comprehensive carrying capacity of a water system according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps:

[0116] Step S301, obtain water resource element data and water environment element data. Figure 2 Step S201 of the illustrated embodiment will not be described in detail here.

[0117] Step S302, determining the water resource carrying capacity index based on the water resource element data.

[0118] Specifically, a water resource carrying capacity assessment method for urban areas is constructed based on the coupling relationship between man and water, and the evolution of water resource carrying capacity in the study area is analyzed and assessed. Water resource element data include surface water resources, groundwater resources, available transit water, production water, domestic water and ecological water; that is, based on the coupling relationship between man and water, surface water resources, groundwater resources and available transit water are obtained from water resource element data; production water, domestic water and ecological water are obtained from water resource element data.

[0119] The above step S302 includes:

[0120] Step S3021, determining the actual water consumption based on production water consumption, domestic water consumption and ecological water consumption.

[0121] Specifically, the formula for determining actual water consumption based on production water consumption, domestic water consumption and ecological water consumption is as follows:

[0122] W use =W industry +W domestic +W ecological (10);

[0123] W industry =W primary +W secondary +W tertiary (11);

[0124] W domestic =WC domestic +WR domestic (12);

[0125] 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 tertiaryThe 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 .

[0126] Step S3022, determining the wastewater reuse amount based on the actual water consumption and the preset reuse rate.

[0127] Specifically, the actual water consumption W use Multiply by the reuse rate rw to calculate the wastewater reuse amount W ruse .

[0128] Step S3023, determining the available amount of local water resources based on the amount of surface water resources and groundwater resources.

[0129] Specifically, the amount of local water resources available W local The surface water resources W surface , Groundwater resources W ground Multiply by the corresponding empirical coefficient to obtain.

[0130] Step S3024, determining the total amount of available water resources based on the available amount of local water resources, the amount of available transit water, and the amount of wastewater reuse.

[0131] Specifically, the calculation formula for the total amount of available water resources is as follows:

[0132]

[0133] 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 transit water available in the study area, which is compiled based on the water abstraction permits from the Ministry of Water Resources.

[0134] Step S3025, determining the water resource carrying capacity index based on the actual water consumption and the total available water resources.

[0135] Step S303, determining the water environment carrying capacity index based on the water environment element data.

[0136] Specifically, the water environment factor data also includes 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 from the flow data, concentration data and sewage discharge time; the above step S303 includes:

[0137] Step S3031, construct a water environment dynamics model 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.

[0138] 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 pollution, 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:

[0139]

[0140] Where Q is the outflow flow of the city; C is the pollutant concentration of the outflow water; t is time; V is the total amount of water resources in the city (total amount of water resources = surface water resources + groundwater resources - 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 point source pollution of life, non-point source pollution, river inflow pollution, external water pollution, etc.; Q j , C j (j=n+1,n+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.

[0141] The preset steady-state emission state is that the pollutant concentration does not change during the time period:

[0142]

[0143] Under the preset steady-state emission condition, formula (14) can be converted into:

[0144]

[0145] 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 (16), we get:

[0146]

[0147] Step S3032, 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.

[0148] 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 in the above step S3033 includes:

[0149] Step a1, 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.

[0150] Specifically, according to the water environment dynamics model formula (14), the total water pollution load L of the urban system outflow in the time period Δt is obtained: out for:

[0151]

[0152] According to the function and classification of water bodies, in order for the water quality of the local river outflow section to reach or exceed specific standards, the following conditions must be met:

[0153] L out =QCΔt≤QC s Δt(19);

[0154] Among them, C s is the water quality standard limit of the local river outflow section. Substituting formula (18) into formula (19) yields:

[0155]

[0156] make:

[0157]

[0158] Among them, L max is the maximum limit of pollution load on outflow water; L point For residents' production (including secondary and tertiary industries) and daily life sewage load; L sum To divide L point For other sources of water pollution and load reduction,

[0159] Q1C1Δt+L sum ≤(KE+1)L max (twenty two);

[0160] Step a2, determine the accommodative load 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.

[0161] Therefore, according to formula (18) and formula (21), the accommodative load is the accommodative sewage load of residents’ production and life, L point Maximum limit L capacity , the specific formula is as follows:

[0162] L capacity =(KE+1)L max -L sum (twenty three).

[0163] Step S3033, determining the water environment carrying capacity index based on the accommodated load and the actual total sewage load.

[0164] The comprehensive carrying capacity assessment method of the water system provided in this embodiment calculates the maximum limit of the pollution load of the outflow water body based on the outflow water flow rate within a preset time period and the local water quality standard; determines the accommodated 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 load reduction, and takes the sewage load of residents' production and life as the actual total sewage load; considers that the water pollutants in the urban area mainly come from sewage discharge from residents' production and life, inbound pollution from rivers, non-point source pollution, external water pollution, etc., and also considers the gradual reduction of the pollution load through artificial sewage treatment and natural degradation, thereby improving the calculation accuracy of the accommodated load.

[0165] Step S304, calculating the comprehensive carrying capacity index of the water system based on the water resource carrying capacity index and the water environment carrying capacity index.

[0166] Specifically, the above step S304 includes:

[0167] Step S3041, calculating the water resource carrying capacity index based on the total available water resources and the actual water consumption.

[0168] Specifically, the water resources carrying capacity index formula is as follows:

[0169]

[0170] Among them, I W It is the water resources carrying capacity index.

[0171] Step S3042, calculating the water environment carrying capacity index based on the accommodated load and the actual total sewage load.

[0172] Specifically, the water environment carrying capacity index formula is as follows:

[0173]

[0174] Among them, I L It is the water environment carrying capacity index.

[0175] Step S3043, calculating the comprehensive carrying capacity index based on the water resources carrying capacity index and the water environment carrying capacity index.

[0176] Specifically, the comprehensive bearing capacity index formula is as follows:

[0177] I=αI W +(1-α)I L (26);

[0178] Among them, I is the comprehensive carrying capacity index of the water system that takes into account the water quantity and quality; α is a coefficient, which can be adjusted according to the actual situation and local development needs. In the present invention, α is 1 / 2. W ,I L The range of I is (-∞,1). The larger the comprehensive bearing capacity index is, the greater the corresponding bearing capacity is. When the comprehensive bearing capacity index is positive, it indicates that the corresponding bearing capacity is in a load-bearing state, otherwise it indicates that it is in an overloaded state.

[0179] Step S305: Evaluate the comprehensive carrying capacity of the water system based on the comprehensive carrying capacity index of the water system. Figure 2 Step S206 of the illustrated embodiment will not be described in detail here.

[0180] The comprehensive carrying capacity assessment method for the water system provided in this embodiment analyzes and assesses the evolution of the water resource carrying capacity, and finally converts the water resource carrying capacity index into a process for solving the total available water resource and the actual water consumption, digitizes the water resource carrying capacity, and makes the calculation of the water resource carrying capacity index simple; converts the water environment carrying capacity index determined based on water environment element data into a process for solving the accommodated load and the actual total sewage load, digitizes the water environment carrying capacity index, and makes the calculation simple, which provides a basis for the subsequent calculation of the comprehensive carrying capacity index of the water system. Calculate the water resource carrying capacity index based on the total available water resource and the actual water consumption; calculate the water environment carrying capacity index based on the accommodated load and the actual total sewage load; calculate the comprehensive carrying capacity index based on the water resource carrying capacity index and the water environment carrying capacity index, which realizes the final calculation of the comprehensive carrying capacity index and provides conditions for the evaluation of the comprehensive carrying capacity of the water system.

[0181] As one or more specific application embodiments of the present invention, Figures 4 to 6 The method for evaluating the comprehensive carrying capacity of a water system provided by the present invention is further described in detail as follows:

[0182] like Figure 4 As shown, a certain city is used as a case area, 2010-2020 is used as the research period, and the total phosphorus index is used as an example for water environment calculation. The specific application includes the following steps:

[0183] 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:

[0184]

[0185] 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.

[0186] Step 2: Sorting out the mutual feedback relationship between people and water (also known as the coupling relationship between people and water): Based on historical data on water resources, water environment, socio-economic factors, etc., summarize the changing patterns among various factors, and use the Coupling Coordination Degree (CCD) model to evaluate the coupling coordination degree between the two subsystems of "people" and "water".

[0187] The calculation formula is as follows:

[0188] (i) First, the entropy weight method is used to evaluate the development level of the two subsystems of "people" and "water":

[0189]

[0190] Where: x ij (i=1,2,…,n;j=1,2,…,m) represents the sample data value of the jth indicator in the i-th year, max(x ij ) and min(x ij ) represent the maximum and minimum values ​​of the sample data in all years respectively; y ij Represents the normalized data value.

[0191] The formula for calculating the information entropy of each indicator using the entropy weight method is as follows:

[0192]

[0193] Where: e j Represents the information entropy of each indicator.

[0194] The formula for determining the weight of each indicator based on the information entropy of each indicator is as follows:

[0195]

[0196] Where: w j Represents the weight value of each indicator, and m represents the number of indicators.

[0197] Calculate the score of the kth subsystem in the i-th year (k=1, 2). In the present invention, there are two subsystems, "people" and "water", so k=1, 2. The "water" subsystem is composed of indicators of water resources and water environment, and the "people" subsystem is composed of social and economic factor data. The score of the kth subsystem in the i-th year is calculated by the following formula:

[0198]

[0199] Among them: U ik It represents the score of the kth (k=1,2) subsystem in the i-th year, and s represents the number of indicators contained in a single subsystem.

[0200] The formula for calculating the comprehensive score of multiple subsystems based on the score of each subsystem is as follows:

[0201]

[0202] Where: R is the comprehensive score of multiple preset subsystems, α k The undetermined coefficient is taken as 1 / h in this embodiment, where h represents the number of included subsystems, and h=2 in this embodiment.

[0203] (ii) The coupling degree C of the human-water system and its coupling coordination degree D as well as the coupling coordination degree of all subsystems in year i are calculated as follows:

[0204]

[0205] Among them: C is the coupling degree between subsystems, ranging from 0 to 1, which can reflect the degree of interaction between subsystems; D is the coupling coordination degree between all subsystems, ranging from 0 to 1, which can calculate the equilibrium state and coordinated development level between subsystems. Figure 5 As shown in the figure, this is the calculation result of the coupling coordination degree of the human-water system in the study area.

[0206] Step 3: Construct a water resources carrying capacity assessment method: Based on the feedback relationship between people and water, construct a water resources carrying capacity assessment method for urban areas, and analyze and evaluate the evolution of water resources carrying capacity in the study area.

[0207] The water resources carrying capacity assessment takes into account the local available water resources, the amount of transit water that can be taken and the reuse of wastewater. The total amount of local water resources that can be used is obtained by multiplying the amount of surface water resources and groundwater resources by the corresponding empirical coefficients respectively; the amount of transit water that can be taken is obtained by sorting out the various water withdrawal permits published by the basin committee; and the amount of wastewater reuse is obtained by multiplying the total water use by the reuse rate in each year.

[0208] 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:

[0209] Table 1

[0210]

[0211]

[0212] Step 4. Construction of water environment carrying capacity assessment method: Based on the mutual feedback relationship between people and water, a water environment carrying capacity assessment method for urban areas is constructed, and the evolution of water resource carrying capacity in the study area is analyzed and evaluated. The water environment carrying capacity assessment generalizes the entire urban area into a water tank, considering that water pollutants in the urban area mainly come from residents' production and living sewage, river pollution, 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 sources, the impact of external water pollution is ignored. The total phosphorus of the present invention is calculated as an example. After deducing the constructed water environment dynamics model, the specific formula is as follows:

[0213] L max =QC s Δt

[0214] L point =Q1C1Δt

[0215]

[0216] L capacity =(KE+1)L max -L sum (twenty three);

[0217] 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 various water pollution sources such as residential production (including secondary and tertiary industries) and point source pollution, non-point source pollution, and river inflow; 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 It is the actual sewage load of residents’ production (including secondary and tertiary industries) and life; L sum To divide L point Other water pollution sources and reduction items; L capacity To produce and live sewage loads for the residents that can be accommodated.

[0218] 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:

[0219] Table 2

[0220]

[0221] Step 5. Calculate the comprehensive carrying capacity index of the water system: construct the water resources and water environment carrying capacity indexes respectively, integrate the two dimensions of water quantity and water quality, calculate the comprehensive carrying capacity index of the water system, and evaluate the comprehensive carrying capacity of the water system in the study area.

[0222] The calculation formula is as follows:

[0223]

[0224] I=αI W +(1-α)I L (26);

[0225] Among them, I W is the water resources carrying capacity index, I L is the water environment carrying capacity index, I is the comprehensive carrying capacity index of the water system taking into account the water quantity and quality; α can be adjusted according to the actual situation and local development needs. In the present invention, α is taken as 1 / 2. W ,I L The range of I is (-∞,1). The larger the comprehensive bearing capacity index is, the larger the corresponding bearing capacity is. When the comprehensive bearing capacity index is positive, it indicates that the corresponding bearing capacity is in a load-bearing state, otherwise it indicates that it is in an overloaded state. Figure 6 As shown in the figure, the comprehensive carrying capacity index of the water system in the study area changes year by year.

[0226] The water system comprehensive carrying capacity assessment method provided in this embodiment is based on the mutual feedback relationship between people and water, integrates the two dimensions of water quantity and water quality to finally achieve the assessment of the comprehensive carrying capacity of the water system. The method of the present invention can provide objective scientific support for guiding water resource management and water environment protection in urban areas.

[0227] In this embodiment, a water system comprehensive bearing capacity assessment device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0228] This embodiment provides a water system comprehensive bearing capacity assessment device, such as Figure 7 As shown, including:

[0229] The data acquisition module 701 is used to acquire water resource element data and water environment element data.

[0230] The water resource carrying capacity index determination module 702 is used to determine the water resource carrying capacity index based on the water resource element data.

[0231] The water environment carrying capacity index determination module 703 is used to determine the water environment carrying capacity index based on the water environment element data.

[0232] The comprehensive carrying capacity index calculation module 704 is used to calculate the comprehensive carrying capacity index of the water system based on the water resource carrying capacity index and the water environment carrying capacity index.

[0233] The comprehensive carrying capacity evaluation module 705 is used to evaluate the comprehensive carrying capacity of the water system based on the comprehensive carrying capacity index of the water system.

[0234] 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 water resource carrying capacity index determination module 702 includes:

[0235] An actual water consumption determination unit, used to determine the actual water consumption based on production water consumption, domestic water consumption and ecological water consumption;

[0236] A wastewater reuse determination unit, used to determine the wastewater reuse amount based on actual water consumption and a preset reuse rate;

[0237] A local water resource availability acquisition unit, used to determine the local water resource availability based on the surface water resource amount and the groundwater resource amount;

[0238] The total available amount acquisition unit is used to determine the total available amount of water resources based on the local water resources available amount, the available transit water amount and the wastewater reuse amount.

[0239] The water resources carrying capacity index determination unit is used to determine the water resources carrying capacity index based on actual water consumption and the total amount of available water resources.

[0240] In some optional implementations, the water environment factor data also includes 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 from the flow data, concentration data and sewage discharge time. The water environment carrying capacity index determination module 703 includes:

[0241] The model building unit is used to build a water environment dynamics model based on the sewage load from residents' production and life, the pollution load from rivers, the pollution load from external water transfer, the pollution load from non-point sources, the natural degradation of pollutants, the reduction in sewage treatment, mass conservation and hydrodynamics theory.

[0242] The load calculation unit 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 the residents' production and living sewage load is taken as the actual total sewage load.

[0243] The water environment carrying capacity index determination unit is used to determine the water environment carrying capacity index based on the accommodated load and the actual total sewage discharge load.

[0244] In some optional implementations, the load calculation unit includes:

[0245] The load maximum limit calculation subunit is used to calculate the maximum limit of the pollution load of the outflowing water body based on the outflow water body flow rate and the local water quality standard within a preset time period.

[0246] The accommodated load calculation subunit is used to determine the accommodated load 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.

[0247] In some optional implementations, the comprehensive bearing capacity index calculation module 704 includes:

[0248] The water resources carrying capacity index calculation unit is used to calculate the water resources carrying capacity index based on the total available water resources and actual water consumption.

[0249] The water environment carrying capacity index calculation unit is used to calculate the water environment carrying capacity index based on the accommodated load and the actual total sewage discharge load.

[0250] The comprehensive carrying capacity index calculation unit is used to calculate the comprehensive carrying capacity index based on the water resources carrying capacity index and the water environment carrying capacity index.

[0251] In some optional implementations, the water system comprehensive carrying capacity assessment device further includes:

[0252] The coupling coordination degree calculation module is used to obtain social and economic factor data and calculate the coupling coordination degree of the human-water system based on water resource factor data, water environment factor data and social and economic factor data.

[0253] In some optional implementations, the coupling coordination degree calculation module includes:

[0254] The sample data acquisition unit is used to select multi-year sample data of multiple indicators within a preset time period from water resource element data, water environment element data and social and economic element data.

[0255] The information entropy calculation unit is used to calculate the information entropy of each indicator respectively by using the entropy weight method.

[0256] The subsystem score calculation unit is used to determine the weight of each indicator based on the information entropy of each indicator, and calculate the score of each subsystem based on each indicator weight.

[0257] The comprehensive score calculation unit is used to calculate the comprehensive scores of the plurality of preset subsystems based on the scores of each preset subsystem.

[0258] The coupling coordination degree calculation unit is used to calculate the human-water-system coupling coordination degree based on the score of each preset subsystem and the comprehensive score of multiple preset subsystems.

[0259] 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.

[0260] The water system comprehensive carrying capacity assessment device 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.

[0261] The embodiment of the present invention also provides a computer device having the above Figure 7 The water system comprehensive carrying capacity assessment device is shown.

[0262] See also Figure 8 , Figure 8 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 8As 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). Figure 8 A processor 10 is taken as an example.

[0263] 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.

[0264] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0265] 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.

[0266] 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.

[0267] 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. Figure 8 The example of connecting through bus is taken in the following.

[0268] 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.

[0269] 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.

[0270] 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 evaluating the comprehensive carrying capacity of a water system, characterized in that: The method comprises: Obtain water resource element data and water environment element data; Determine a water resources carrying capacity index based on the water resources element data; Determine a water environment carrying capacity index based on the water environment element data; Calculate the comprehensive carrying capacity index of the water system based on the water resources carrying capacity index and the water environment carrying capacity index; The comprehensive carrying capacity of the water system is evaluated based on the comprehensive carrying capacity index of the water system.

2. The method according to claim 1, characterized in that The water environment factor data includes non-point source pollution load, which is calculated using the output coefficient model. The calculation formula is as follows: Among them, L npoint is the non-point source pollution 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; PI is the amount of nutrients input by rainfall.

3. The method according to claim 1, characterized in that Before determining the water resource carrying capacity index based on the water resource element data, the method further includes: The social and economic factor data are obtained, and the degree of coupling coordination of the human-water system is calculated based on the water resource factor data, the water environment factor data and the social and economic factor data.

4. The method according to claim 3, characterized in that Acquiring social and economic factor data, and calculating the degree of coupling coordination of the human-water system based on the water resource factor data, the water environment factor data and the social and economic factor data includes: Obtaining socio-economic factor data, selecting multi-year sample data of multiple indicators within a preset time period from water resource factor data, water environment factor data and socio-economic factor data; The information entropy of each indicator is calculated using the entropy weight method; Determine each indicator weight based on the information entropy of each indicator, and calculate the score of each preset subsystem based on each indicator weight; Calculating a comprehensive score of the plurality of preset subsystems based on the score of each preset subsystem; The degree of human-water system coupling coordination is calculated based on the score of each preset subsystem and the comprehensive score of multiple preset subsystems.

5. 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 the water resources carrying capacity index based on the water resources element data includes: 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; The water resource carrying capacity index is determined based on the actual water consumption and the total available water resources.

6. The method according to claim 2, characterized in that The water environment factor data also include the sewage load of residents' production and life, the pollution load of rivers entering the country, the pollution load of external water transfer, the natural degradation of pollutants, the reduction of sewage treatment, the outflow 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 data, concentration data and sewage discharge time; Determining the water environment carrying capacity index based on the water environment element data includes: A water environment dynamics model 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 sources, 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 index is determined based on the accommodated load and the actual total sewage load.

7. The method according to claim 6, 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 local water quality standards 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.

8. The method according to claim 7, characterized in that The calculation of the comprehensive carrying capacity index of the water system based on the water resources carrying capacity index and the water environment carrying capacity index includes: Calculate the water resource carrying capacity index based on the total available water resources and actual water consumption; Calculating a water environment carrying capacity index based on the accommodated load and the actual total sewage load; A comprehensive carrying capacity index is calculated based on the water resources carrying capacity index and the water environment carrying capacity index.

9. A water system comprehensive bearing capacity assessment device, characterized in that: The device comprises: A data acquisition module is used to acquire water resource element data and water environment element data; A water resources carrying capacity index determination module, used to determine the water resources carrying capacity index based on the water resources element data; A water environment carrying capacity index determination module, used to determine the water environment carrying capacity index based on the water environment element data; A comprehensive carrying capacity index calculation module, used to calculate the comprehensive carrying capacity index of the water system based on the water resources carrying capacity index and the water environment carrying capacity index; The comprehensive carrying capacity evaluation module is used to evaluate the comprehensive carrying capacity of the water system based on the comprehensive carrying capacity index of the water system.

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 water system comprehensive carrying capacity assessment method according to 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 water system comprehensive carrying capacity assessment method according to any one of claims 1 to 8.

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