Ground source pollutant load emission reduction analysis method, device and equipment and storage medium

Abstract

The invention relates to the technical field of water environment protection and environment management, and discloses a terrestrial pollutant load emission reduction analysis method, device and equipment and a storage medium. The method comprises the steps that a bay drainage basin is divided into first drainage basins from sea rivers to bays, second drainage basins from tributaries to the sea rivers and third drainage basins from source pollution sources to the tributaries; according to the obtained bay watershed environmental parameters, the allowable emission amount of various terrestrial pollutant emission subjects is determined; based on the allowable discharge amount and the current discharge amount of the various terrestrial pollutant discharge subjects, the emission reduction rate, the pollution production reduction rate, the engineering emission reduction increase rate and the drainage basin self-net increase rate of terrestrial pollutants are determined; and determining a land source pollutant load emission reduction strategy according to the emission reduction rate, the pollution production reduction rate, the engineering emission reduction increase rate and the drainage basin self-net increase rate. And the emission amount of various terrestrial pollutants can be controlled, so that the sea-entering emission amount of terrestrial sources is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water environment protection and environmental management, and in particular to a land-based pollutant load reduction analysis method, device, equipment and storage medium. Background Art

[0003] Technical measures for the prevention and control of land and sea environmental pollution are mainly divided into end-of-pipe treatment, land and sea ecological space restoration and construction, and source control. Most existing related methods usually focus on end-of-pipe treatment, while there is great uncertainty in the quantification and optimization of land and sea ecological space restoration and construction and source control measures. As a result, both types of methods have the defect of low efficiency due to incomplete prevention and control technical means.

[0004] Therefore, there is an urgent need for a method to formulate precise emission reduction targets and strategies for pollutant loads that coordinates land and sea, so as to provide a quantitative basis for pollution prevention and control strategies for land-based pollutants. Summary of the invention

[0005] In view of this, the present application provides a land-based pollutant load reduction analysis method, device, equipment and storage medium, which can coordinate land-based emission reduction targets and provide quantitative emission reduction strategies.

[0006] In a first aspect, the present invention provides a method for analyzing land-based pollutant load reduction, the method comprising:

[0007] The Bay Basin is divided into the first basin between each river flowing into the sea and the Bay, the second basin between each tributary and each river flowing into the sea, and the third basin between each pollution source and each tributary;

[0008] Based on the acquired environmental parameters of the Bay Basin, determine the maximum allowable amount of pollutants entering the sea from each river flowing into the Bay, the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river flowing into the sea, and the maximum allowable amount of pollutants generated from each pollution source to its corresponding tributary;

[0009] Obtain the current amount of pollutants entering the sea from each river flowing into the bay, the current amount of pollutants entering the river from each tributary to its corresponding river flowing into the sea, and the current amount of pollutants generated by each pollution source to its corresponding tributary;

[0010] Based on the maximum allowable amount of discharge into the sea and the current amount of discharge into the sea, determine the required reduction rate of land-based pollutants; based on the maximum allowable amount of discharge into the river, the current amount of discharge into the river, the maximum allowable amount of discharge generated and the current amount of discharge generated, determine the pollution reduction rate, engineering emission reduction rate and basin self-purification rate of land-based pollutants;

[0011] Determine the strategy for reducing land-based pollutant load based on the required reduction rate, pollution reduction rate, engineering emission reduction rate and basin self-purification rate.

[0012] The land-based pollutant load reduction analysis method provided by the present invention can determine the load limit of the main land-based pollutants discharged into the sea in the bay. By back-calculating the load distribution amount step by step according to the pollutant transfer path based on the sea water quality target, it covers the whole chain process of land-based pollutants from "source" to "flow" to "sink" into the sea, realizes the coordination of the watershed and sea environmental quality standards, improves the feasibility of the pollution load optimization allocation method and the credibility of the allocation results, and determines the allowable emissions of various land-based pollutant emission entities, so as to facilitate each pollution source to control the pollutant emissions, thereby reducing the land-based emissions into the sea. Based on the step-by-step optimization allocation results of land and sea pollution loads and the current emission results, the binding targets for emission reduction and the guiding targets for emission reduction measures are calculated, and reasonable and feasible precision governance measures are formulated to further ensure that the marine environmental quality meets the standards.

[0013] In an optional embodiment, the determination of the maximum allowable amount of pollutants entering the sea from each river entering the sea, the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the maximum allowable amount of pollutants generated from each pollution source to its corresponding tributary based on the acquired environmental parameters of the bay basin includes:

[0014] Acquire the bay basin environmental parameters, and respectively extract the first environmental parameters of the bay, the second environmental parameters of the first basin, the third environmental parameters of the second basin, and the fourth environmental parameters of the third basin from the bay basin environmental parameters;

[0015] Determine the maximum allowable amount of pollutants entering the sea from each river into the bay based on the first environmental parameter and the second environmental parameter;

[0016] Based on the third environmental parameter and the maximum allowable amount of pollutants entering the sea, determining the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river entering the sea;

[0017] Based on the fourth environmental parameter and in accordance with the maximum allowable river inflow, the maximum allowable generation of pollutants from each pollution source to its corresponding tributary is determined.

[0018] In an optional embodiment, determining the maximum allowable amount of pollutants entering the sea from each river into the bay based on the first environmental parameter and the second environmental parameter includes:

[0019] Based on the first environmental parameter and according to the three-dimensional hydrodynamic and biogeochemical processes of the bay, determining the quantitative response relationship between the amount of pollutants entering the sea from the river and the water quality of the bay;

[0020] Based on the quantitative response relationship, calculating the maximum tolerance capacity of the bay pollutants;

[0021] Based on the second environmental parameter, determining the first pollutant allocation weight corresponding to each river entering the sea;

[0022] Based on the maximum bearing capacity, the quantitative response relationship and the first pollutant allocation weight corresponding to each river entering the sea, the maximum allowable discharge of each river entering the sea is calculated respectively;

[0023] The determining, based on the third environmental parameter and according to the maximum allowable discharge into the sea, of the maximum allowable discharge into the sea of ​​pollutants from each tributary to its corresponding river into the sea comprises:

[0024] Based on the third environmental parameter, the pollutant degradation coefficient of each tributary is calculated;

[0025] Determining a second pollutant allocation weight corresponding to each tributary based on the pollutant degradation coefficient of each tributary;

[0026] Based on the maximum allowable amount of discharge into the sea and the second pollutant allocation weight corresponding to each river that discharges into the sea, the maximum allowable amount of discharge into the river of each tributary is calculated respectively;

[0027] The determining, based on the fourth environmental parameter and according to the maximum allowable inflow into the river, the maximum allowable generation of pollutants from each pollution source to its corresponding tributary includes:

[0028] Based on the fourth environmental parameter, determining the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary;

[0029] Based on the maximum allowable amount of inflow into the river and the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributaries, the maximum allowable production amount of each pollution source is calculated respectively.

[0030] In an optional implementation, determining the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary based on the fourth environmental parameter includes:

[0031] Based on the fourth environmental parameter, a comprehensive removal rate from the point source pollution source to the tributary is calculated;

[0032] Based on the comprehensive removal rate, determining the relationship between the pollutant production of the point source pollution source and the reduction of the point source pollution source to the tributary;

[0033] Based on the fourth environmental parameter, the degradation rate of the non-point source pollution is calculated;

[0034] Based on the degradation rate, determining the relationship between the amount of pollutant produced by the non-point source and the amount of reduction from the non-point source to the tributary;

[0035] The maximum allowable amount of each pollution source is calculated based on the relationship between the maximum allowable amount of inflow into the river and the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary, including:

[0036] Based on the maximum allowable amount of inflow into the river and the relationship between the pollutant production of the point source pollution source and the reduction amount from the point source pollution source to the tributary, the maximum allowable amount of production of the point source pollution source is calculated.

[0037] In an optional embodiment, the maximum allowable amount of each pollution source is calculated based on the maximum allowable amount of inflow into the river and the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary, and further includes:

[0038] Based on the maximum allowable amount of inflow into the river and the relationship between the pollutant production of the non-point source of pollution and the reduction amount of the non-point source of pollution to tributaries, the maximum allowable amount of production of the non-point source of pollution is calculated.

[0039] In an optional implementation, determining the required reduction rate of land-based pollutants based on the maximum allowable discharge into the sea and the current discharge into the sea includes:

[0040] Based on the emission reduction starting year and the target year for improving the coastal water quality, the required emission reduction rate of land-based pollutants is calculated according to the maximum allowable amount of pollutants entering the sea from each river into the bay and the current amount of pollutants entering the sea;

[0041] The required reduction rate of land-based pollutants is expressed as follows:

[0042]

[0043] In the formula, F i,j,k represents the current amount of land-based pollutants entering the sea, It represents the maximum allowable amount of land-based pollutants entering the sea, i, j, k represent the numbers of control units at various levels, t represents the year, S and G represent the starting year of emission reduction and the year when the nearshore water quality improvement target is achieved, respectively.

[0044] In an optional embodiment, the determination of the pollution reduction rate, engineering emission reduction rate and basin self-purification rate of land-based pollutants based on the maximum allowable inflow into the river, the current inflow into the river, the maximum allowable generation and the current generation includes:

[0045] The reduction rate of land-based pollutants is calculated based on the maximum allowable generation and current generation of pollutants from each pollution source to its corresponding tributaries;

[0046] Based on the maximum allowable generation and current generation of pollutants from each pollution source to its corresponding tributary, as well as the maximum allowable and current inflow of pollutants from each tributary to its corresponding river into the sea, the engineering emission reduction rate and the basin self-purification rate of land-based pollutants are calculated;

[0047] Wherein, the expression of the pollution reduction rate is:

[0048]

[0049] The expression of the emission reduction rate of the project is:

[0050]

[0051] The expression of the watershed net increase rate is:

[0052]

[0053] Where W i,j,k Indicates the current amount of pollutants generated by each pollution source to its corresponding tributary, It represents the maximum allowable amount of pollutants generated by each pollution source to its corresponding tributary, E i,j,k represents the current reduction of pollution from each point source to the tributary, represents the minimum reduction amount from each point source pollution source to the tributary, T i,j,k represents the current degradation amount of each non-point source pollution source to the tributary, It represents the minimum degradation amount from each non-point source of pollution to the tributaries, i, j, k represent the numbers of control units at each level, t represents the year, S and G represent the starting year of emission reduction and the year when the coastal water quality improvement target is achieved, respectively.

[0054] In a second aspect, the present invention provides a land-based pollutant load reduction analysis device, the device comprising:

[0055] The watershed division module is used to divide the bay watershed into the first watershed between each river flowing into the sea and the bay, the second watershed between each tributary and each river flowing into the sea, and the third watershed between each pollution source and each tributary;

[0056] A determination module is used to determine the maximum allowable amount of pollutants entering the sea from each river entering the sea to the bay, the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the maximum allowable amount of pollutants generated from each pollution source to its corresponding tributary based on the acquired environmental parameters of the bay basin;

[0057] An acquisition module is used to obtain the current amount of pollutants entering the sea from each river entering the sea to the bay, the current amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the current amount of pollutants generated by each pollution source to its corresponding tributary;

[0058] A calculation module, for determining the required reduction rate of land-based pollutants based on the maximum allowable amount of discharge into the sea and the current amount of discharge into the sea, and for determining the pollution reduction rate, engineering emission reduction rate and basin self-purification rate of land-based pollutants based on the maximum allowable amount of discharge into the river, the current amount of discharge into the river, the maximum allowable amount of discharge and the current amount of discharge;

[0059] The strategy generation module is used to determine the land-based pollutant load reduction strategy based on the required emission reduction rate, pollution reduction rate, engineering emission reduction increase rate and basin self-purification increase rate.

[0060] In a third aspect, the present invention provides a computer device comprising 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 land-based pollutant load reduction analysis method of the first aspect and any one of its optional embodiments by executing the computer instructions.

[0061] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions for enabling the computer to execute the land-based pollutant load reduction analysis method of the first aspect and any one of its optional embodiments.

[0062] In a fifth aspect, the present invention provides a computer program product, comprising computer instructions for causing a computer to execute the land-based pollutant load reduction analysis method of the first aspect and any one of its optional embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] 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.

[0064] Figure 1 It is a schematic diagram of a flow chart of a land-based pollutant load reduction analysis method provided by an embodiment of the present invention;

[0065] Figure 2 This is a schematic diagram of the source-flow-sink process of land-based pollutants provided by an embodiment of the present invention;

[0066] Figure 3 This is a structural block diagram of a land-based pollutant load reduction analysis device provided by an embodiment of the present invention;

[0067] Figure 4 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0068] 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.

[0069] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0070] Existing relevant technologies have proposed the nearshore water quality simulation trial deviation method, statistical model method and mathematical programming method for determining the land-based emission reduction targets. All of them can only calculate the maximum allowable discharge of land-based pollutants into the sea, which is limited to the amount of emission reduction of land-based pollutants into the sea. This is an important reason why we are still accustomed to subjective experience in the selection of emission reduction measures. As a result, the accuracy of emission reduction measures is often seriously biased. Moreover, the improvement targets of land and sea environmental quality not only depend on key industrial sources and urban living sources, but are also closely related to non-key industrial sources and rural living sources. However, most of the two methods currently focus on the former, and the latter is only used as a supplementary measure when the former control cannot achieve the environmental quality target. Moreover, since such pollution sources are relatively difficult to monitor, control and evaluate, there are often only descriptive suggestions but no quantitative indicators.

[0071] Technical measures for the prevention and control of land and sea environmental pollution are mainly divided into terminal treatment, land and sea ecological space restoration and construction, and source control. Among the related technologies, whether it is the optimization configuration method or the multi-scenario trial and optimization method, most of them usually focus on terminal treatment, and there is great uncertainty in the quantification and optimization of land and sea ecological space restoration and construction and source control measures. As a result, both methods have the defect of low efficiency due to incomplete prevention and control technical means. As a result, existing research is limited to qualitative descriptions of monitoring and simulation results.

[0072] To solve the above problems, an embodiment of the present invention provides a method for analyzing land-based pollutant load reduction. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system (computer device) including 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.

[0073] In this embodiment, a method for outputting debug log information is provided, which can be used for the above-mentioned terminal devices, such as mobile phones, tablet computers, etc. Figure 1 : is a flow chart of a land-based pollutant load reduction analysis method provided by an embodiment of the present invention, such as Figure 1 As shown, the process includes the following steps.

[0074] Step S101, dividing the bay basin into a first basin between each river flowing into the sea and the bay, a second basin between each tributary and each river flowing into the sea, and a third basin between each pollution source and each tributary.

[0075] In step S101, in order to coordinate the environmental quality standards of the river basin and the sea area, the whole chain of land-based pollutants from "source" to "flow" to "sink" into the sea is divided into three levels of control units: bay-river into the sea, river into the sea-tributary and tributary-pollution source, such as Figure 2 As shown, the coordination of environmental quality standards in each link is ensured.

[0076] Optionally, step S101 specifically includes:

[0077] Based on the land-sea water dynamics-biogeochemistry model, the basins of the main rivers entering the bay are divided into the first-level control units of the bay. According to the topography, river system, etc., the first-level control unit can be further divided into several second-level control units; according to the topography, river system, pollutant migration path, land use type, etc., the second-level control unit can be further divided into several third-level control units. Based on the basin control unit classification system, the allowable inflow pollutant flux of each second-level control unit will be further allocated to each third-level control unit, etc.

[0078] Among them, in the land-sea water dynamics-biogeochemical model, the sea area model can use the Delft3D software package developed by Deltare in the Netherlands, which can simulate two-dimensional and three-dimensional water flow, waves, water quality, ecology, sediment transport and bed topography, as well as the interaction between various processes. The land area model can use the SWAT distributed model, which has a strong physical basis and can carefully depict the temporal and spatial characteristics of water cycle and pollutant cycle changes, and can also simulate the impact of human activities on the water cycle of the basin. By simulating the pollutant concentration response of the basin and the sea area through the land-sea water dynamics-biogeochemical model, the quantitative response relationship between the amount of pollutants entering the sea and the water quality of the bay can be obtained.

[0079] Step S102, based on the acquired environmental parameters of the bay basin, determine the maximum allowable discharge of pollutants from each river flowing into the bay, the maximum allowable discharge of pollutants from each tributary to its corresponding river flowing into the sea, and the maximum allowable generation of pollutants from each pollution source to its corresponding tributary.

[0080] In step S102, after the bay basin is divided, in order to facilitate accurate monitoring of the pollutant load of each level of the bay basin, the environmental parameters of the basin at each level and the parameters of the load distribution related indicators are obtained to clarify the distribution of pollutants in the basin at each level, and determine the maximum allowable emissions of various land-based pollutant emitters based on the environmental parameters of the bay basin.

[0081] Specifically, in step S102, according to the sea water quality target, the load distribution is reversed step by step according to the pollution transfer path, and the relationship between pollutant generation, sewage treatment plant treatment, basin degradation and pollutant discharge into the sea is established based on environmental statistical data.

[0082] The expression of this relationship is:

[0083]

[0084] In the formula, the subscripts i, j, and k are the numbers of the control units at each level, and W, E, T, and F are pollutant generation, sewage treatment plant treatment, watershed degradation, and amount entering the sea, respectively.

[0085] According to the connection relationship between each "source-flow-sink" link, for the i-th first-level control unit, the j-th second-level control unit, and the k-th third-level control unit, the relationship can be further refined into the pollutant inflow into the river of the third-level control unit (R i,j,k ), point source generation Non-point source generation Pollutant reduction in sewage treatment plants (E i,j,k ) and the degradation of non-point source pollutants before entering the river The relationship between them. The expression is:

[0086]

[0087] Among them, for industrial sources, the amount of pollutants generated refers to the amount of pollutants discharged at the outlet of industrial enterprises, and for non-point sources, the amount of pollutants generated refers to the amount of non-point sources generated in situ without loss. The reduction of sewage treatment plants refers to the reduction of industrial and domestic pollutants in urban sewage treatment plants, which can be expressed as:

[0088]

[0089] In the formula, Ω and ψ represent the sewage collection rate and pollutant removal rate respectively, μ = Ω·ψ, which is called the comprehensive removal rate.

[0090] The degradation amount of non-point source pollutants before entering the river refers to the amount of pollutants removed by the self-purification capacity of the environment due to various biogeochemical processes in the natural environment, such as degradation, biological growth, and sedimentation. It can be expressed as:

[0091]

[0092] in, It represents the degradation rate of non-point source pollutants in the i-th main stream, the j-th first-level tributary, and the k-th second-level tributary before entering the river.

[0093] Optionally, step S102 specifically includes:

[0094] Acquire the bay basin environmental parameters, and respectively extract the first environmental parameters of the bay, the second environmental parameters of the first basin, the third environmental parameters of the second basin, and the fourth environmental parameters of the third basin from the bay basin environmental parameters;

[0095] The maximum permissible amount of pollutants entering the sea from each river into the bay is determined based on the first environmental parameter and the second environmental parameter. The pollutant load distribution of each river entering the sea is determined by calculating the maximum permissible amount of pollutants entering the sea at each estuary to ensure that the marine environmental quality meets the standards.

[0096] Specifically, based on the first environmental parameter and according to the three-dimensional hydrodynamics and biogeochemical processes of the bay, the quantitative response relationship between the amount of pollutants entering the sea from rivers and the water quality of the bay is determined; based on the quantitative response relationship, the maximum carrying capacity of pollutants in the bay is calculated; based on the second environmental parameter, the first pollutant allocation weight corresponding to each river entering the sea is determined; based on the maximum carrying capacity, the quantitative response relationship and the first pollutant allocation weight corresponding to each river entering the sea, the maximum allowable amount of pollutants entering the sea from each river entering the sea is calculated.

[0097] Based on the third environmental parameter and the maximum allowable inflow into the sea, the maximum allowable inflow of pollutants from each tributary to its corresponding river into the sea is determined. By calculating the maximum allowable inflow of each tributary into the sea, the load distribution of each pollution source and the constraint on the amount of pollutants generated are determined, which can facilitate management.

[0098] Specifically, based on the third environmental parameter, the pollutant degradation coefficient of each tributary is calculated; based on the pollutant degradation coefficient of each tributary, the second pollutant allocation weight corresponding to each tributary is determined; based on the maximum allowable amount of discharge into the sea and the second pollutant allocation weight corresponding to each river entering the sea, the maximum allowable amount of discharge into the river for each tributary is calculated respectively.

[0099] Based on the fourth environmental parameter and the maximum allowable amount of pollutants discharged from each pollution source to its corresponding tributary, the maximum allowable amount of pollutants discharged from each pollution source to its corresponding tributary is determined according to the maximum amount of discharge into the river. The maximum allowable amount of pollutants discharged from each pollution source is calculated by inverse calculation through the maximum amount of discharge into the river, and the pollutant discharge from each pollution source is limited. The maximum value of the pollutant discharge from each pollution source is clarified, which facilitates each pollution source to control the discharge of pollutants, thereby reducing the amount of land-based discharge into the sea, and providing a definite load distribution result support for the formulation of reasonable and feasible governance measures.

[0100] Specifically, based on the fourth environmental parameter, the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributaries is determined; based on the maximum allowable river inflow and the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributaries, the maximum allowable production amount of each pollution source is calculated respectively.

[0101] Step S103, obtaining the current amount of pollutants entering the sea from each river into the bay, the current amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the current amount of pollutants generated from each pollution source to its corresponding tributary.

[0102] In step S103, the current emission of various land-based pollutant emitters is obtained to calculate the binding targets for emission reduction quantities and the guiding targets for emission reduction measures.

[0103] Step S104, based on the maximum allowable amount of discharge into the sea and the current amount of discharge into the sea, determine the required reduction rate of land-based pollutants; based on the maximum allowable amount of discharge into the river, the current amount of discharge into the river, the maximum allowable amount of production and the current amount of production, determine the pollution reduction rate, engineering emission reduction rate and watershed self-purification rate of land-based pollutants.

[0104] In step S104, by calculating the binding targets of emission reduction quantity and the guiding targets of emission reduction measures, the corresponding emission reduction strategy is selected according to the reduction rate of land-based pollutants, the self-purification rate of the watershed, the increase rate of engineering emission reduction, and the efficiency of pollutant emission reduction of the selectable prevention and control measures. The emission reduction strategy can be a pre-set strategy for different emission reduction targets.

[0105] Optionally, step S104 specifically includes:

[0106] Based on the emission reduction starting year and the target year for improving the coastal water quality, the required emission reduction rate of land-based pollutants is calculated according to the maximum allowable amount of pollutants entering the sea from each river into the bay and the current amount of pollutants entering the sea;

[0107] The required reduction rate of land-based pollutants is expressed as follows:

[0108]

[0109] In the formula, F i,j,k represents the current amount of land-based pollutants entering the sea, It represents the maximum allowable amount of land-based pollutants entering the sea, i, j, k represent the numbers of control units at various levels, t represents the year, S and G represent the starting year of emission reduction and the year when the nearshore water quality improvement target is achieved, respectively.

[0110] The reduction rate of land-based pollutants is calculated based on the maximum allowable generation and current generation of pollutants from each pollution source to its corresponding tributaries;

[0111] Based on the maximum allowable generation and current generation of pollutants from each pollution source to its corresponding tributary, as well as the maximum allowable and current inflow of pollutants from each tributary to its corresponding river into the sea, the engineering emission reduction rate and the basin self-purification rate of land-based pollutants are calculated;

[0112] Wherein, the expression of the pollution reduction rate is:

[0113]

[0114] The expression of the emission reduction rate of the project is:

[0115]

[0116] The expression of the watershed net increase rate is:

[0117]

[0118] Where W i,j,k Indicates the current amount of pollutants generated by each pollution source to its corresponding tributary, It represents the maximum allowable amount of pollutants generated by each pollution source to its corresponding tributary, E i,j,k represents the current reduction of pollution from each point source to the tributary, represents the minimum reduction amount from each point source pollution source to the tributary, T i,j,k represents the current degradation amount of each non-point source pollution source to the tributary, It represents the minimum degradation amount from each non-point source of pollution to the tributaries, i, j, k represent the numbers of control units at each level, t represents the year, S and G represent the starting year of emission reduction and the year when the coastal water quality improvement target is achieved, respectively.

[0119] Step S105, determining a land-based pollutant load reduction strategy based on the required reduction rate, pollution reduction rate, engineering emission reduction rate and basin self-purification rate.

[0120] In step S105, the reliability of the technical method for reducing land-based pollutants should be tested on the efficiency of the land-based emission reduction measures. Only by matching with relevant social, economic and environmental ecological indicators can land-based emission reduction measures with high emission reduction efficiency be optimized and combined according to the guiding indicators of land-based emission reduction measures. Therefore, the efficiency of the land-based emission reduction indicator system can be tested by the significant difference between the relevant social, economic and environmental ecological indicators of the areas that need and do not need to implement emission reduction measures.

[0121] In summary, the land-based pollutant load reduction analysis method provided by the present invention can determine the load limit of the main land-based pollutants entering the sea in the bay, and by reversely calculating the load distribution according to the pollution transfer path based on the sea water quality target, covering the entire chain of land-based pollutants entering the sea from "source" to "flow" to "sink", achieving the coordination of watershed and sea environmental quality standards, improving the feasibility of the pollution load optimization allocation method and the credibility of the allocation results, and by determining the maximum allowable emissions of various land-based pollutant emission entities, it is convenient for each pollution source to control the pollutant emissions, thereby reducing the number of land-based emissions into the sea. Based on the step-by-step optimization allocation results of land and sea pollution loads and the current emission results, the binding targets for emission reduction and the guiding targets for emission reduction measures are calculated, and reasonable and feasible precision governance measures are formulated to further ensure that the marine environmental quality meets the standards.

[0122] In the embodiments of the present application, a download process control device is also provided, which is used to implement the above 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 of 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.

[0123] The present application provides a device for analyzing the reduction of land-based pollutant load. Figure 3 : is a schematic diagram of a land-based pollutant load reduction analysis device provided in an embodiment of the present application, the device comprising:

[0124] The watershed division module 201 is used to divide the bay watershed into a first watershed between each river flowing into the sea and the bay, a second watershed between each tributary and each river flowing into the sea, and a third watershed between each pollution source and each tributary;

[0125] Determination module 202, for determining the maximum allowable amount of pollutants entering the sea from each river entering the sea to the bay, the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the maximum allowable amount of pollutants generated from each pollution source to its corresponding tributary according to the acquired environmental parameters of the bay basin;

[0126] The acquisition module 203 is used to obtain the current amount of pollutants entering the sea from each river entering the sea to the bay, the current amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the current amount of pollutants generated by each pollution source to its corresponding tributary;

[0127] The calculation module 204 is used to determine the required reduction rate of land-based pollutants based on the maximum allowable amount of discharge into the sea and the current amount of discharge into the sea, and to determine the pollution reduction rate, engineering emission reduction rate and basin self-purification rate of land-based pollutants based on the maximum allowable amount of discharge into the river, the current amount of discharge into the river, the maximum allowable amount of discharge and the current amount of discharge;

[0128] The strategy generation module 205 is used to determine the land-based pollutant load reduction strategy based on the required reduction rate, pollution reduction rate, engineering emission reduction rate and basin self-purification rate.

[0129] 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.

[0130] The download process control 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.

[0131] The embodiment of the present invention also provides a computer device having the above Figure 3 The download process control device shown.

[0132] See also Figure 4 , Figure 4 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 4 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 instructions executed in the computer device, including instructions stored in or on the memory to display graphic information in a graphical user interface on an external input / output device (such as a display device coupled to an 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 4 A processor 10 is taken as an example.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0138] 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.

[0139] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0140] 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 land-based pollutant load reduction analysis method, characterized in that: include: The Bay Basin is divided into the first basin between each river flowing into the sea and the Bay, the second basin between each tributary and each river flowing into the sea, and the third basin between each pollution source and each tributary; Based on the acquired environmental parameters of the Bay Basin, determine the maximum allowable amount of pollutants entering the sea from each river flowing into the Bay, the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river flowing into the sea, and the maximum allowable amount of pollutants generated from each pollution source to its corresponding tributary; Obtain the current amount of pollutants entering the sea from each river flowing into the bay, the current amount of pollutants entering the river from each tributary to its corresponding river flowing into the sea, and the current amount of pollutants generated by each pollution source to its corresponding tributary; Based on the maximum allowable amount of discharge into the sea and the current amount of discharge into the sea, determine the required reduction rate of land-based pollutants; based on the maximum allowable amount of discharge into the river, the current amount of discharge into the river, the maximum allowable amount of discharge generated and the current amount of discharge generated, determine the pollution reduction rate, engineering emission reduction rate and basin self-purification rate of land-based pollutants; Determine the strategy for reducing land-based pollutant load based on the required reduction rate, pollution reduction rate, engineering emission reduction rate and basin self-purification rate.

2. The method according to claim 1, characterized in that The maximum permissible amount of pollutants discharged from each river into the bay, the maximum permissible amount of pollutants discharged from each tributary to its corresponding river into the sea, and the maximum permissible amount of pollutants generated from each pollution source to its corresponding tributary are determined based on the obtained environmental parameters of the bay basin, including: Acquire the bay basin environmental parameters, and respectively extract the first environmental parameters of the bay, the second environmental parameters of the first basin, the third environmental parameters of the second basin, and the fourth environmental parameters of the third basin from the bay basin environmental parameters; Determine the maximum allowable amount of pollutants entering the sea from each river into the bay based on the first environmental parameter and the second environmental parameter; Based on the third environmental parameter and the maximum allowable amount of pollutants entering the sea, determining the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river entering the sea; Based on the fourth environmental parameter and in accordance with the maximum allowable river inflow, the maximum allowable generation of pollutants from each pollution source to its corresponding tributary is determined.

3. The method according to claim 2, characterized in that The determining the maximum allowable amount of pollutants entering the sea from each river into the bay based on the first environmental parameter and the second environmental parameter includes: Based on the first environmental parameter and according to the three-dimensional hydrodynamic and biogeochemical processes of the bay, determining the quantitative response relationship between the amount of pollutants entering the sea from the river and the water quality of the bay; Based on the quantitative response relationship, calculating the maximum tolerance capacity of the bay pollutants; Based on the second environmental parameter, determining the first pollutant allocation weight corresponding to each river entering the sea; Based on the maximum bearing capacity, the quantitative response relationship and the first pollutant allocation weight corresponding to each river entering the sea, the maximum allowable discharge of each river entering the sea is calculated respectively; The determining, based on the third environmental parameter and according to the maximum allowable discharge into the sea, of the maximum allowable discharge into the sea of ​​pollutants from each tributary to its corresponding river into the sea comprises: Based on the third environmental parameter, the pollutant degradation coefficient of each tributary is calculated; Determining the second pollutant allocation weight corresponding to each tributary based on the pollutant degradation coefficient of each tributary; Based on the maximum allowable amount of discharge into the sea and the second pollutant allocation weight corresponding to each river that discharges into the sea, the maximum allowable amount of discharge into the river of each tributary is calculated respectively; The determining, based on the fourth environmental parameter and according to the maximum allowable inflow into the river, the maximum allowable generation of pollutants from each pollution source to its corresponding tributary includes: Based on the fourth environmental parameter, determining the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary; Based on the maximum allowable amount of inflow into the river and the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributaries, the maximum allowable production amount of each pollution source is calculated respectively.

4. The method according to claim 3, characterized in that Determining the relationship between the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary based on the fourth environmental parameter includes: Based on the fourth environmental parameter, a comprehensive removal rate from the point source pollution source to the tributary is calculated; Determining, based on the comprehensive removal rate, the relationship between the amount of pollutant produced by the point source pollution source and the amount of reduction from the point source pollution source to the tributary; Based on the fourth environmental parameter, the degradation rate of the non-point source pollution is calculated; Based on the degradation rate, determining a relationship between the amount of pollutant produced by the non-point source and the amount of reduction from the non-point source to the tributary; The maximum allowable amount of each pollution source is calculated based on the relationship between the maximum allowable amount of inflow into the river and the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary, including: Based on the maximum allowable amount of inflow into the river and the relationship between the pollutant production of the point source pollution source and the reduction amount from the point source pollution source to the tributary, the maximum allowable amount of production of the point source pollution source is calculated.

5. The method according to claim 4, characterized in that The maximum allowable amount of each pollution source is calculated based on the relationship between the maximum allowable amount of inflow into the river and the pollutant production of each pollution source and the reduction amount from the pollution source to the tributary, and further includes: Based on the maximum allowable amount of inflow into the river and the relationship between the pollutant production of the non-point source of pollution and the reduction amount of the non-point source of pollution to tributaries, the maximum allowable amount of production of the non-point source of pollution is calculated.

6. The method according to any one of claims 1 to 5, characterized in that: Determining the required reduction rate of land-based pollutants based on the maximum allowable discharge into the sea and the current discharge into the sea includes: Based on the emission reduction starting year and the target year for improving the coastal water quality, the required emission reduction rate of land-based pollutants is calculated according to the maximum allowable amount of pollutants entering the sea from each river into the bay and the current amount of pollutants entering the sea; The required reduction rate of land-based pollutants is expressed as follows: In the formula, f i,j,k represents the current amount of land-based pollutants entering the sea, It represents the maximum allowable amount of land-based pollutants entering the sea, i, j, k represent the numbers of control units at various levels, t represents the year, S and G represent the starting year of emission reduction and the year when the nearshore water quality improvement target is achieved, respectively.

7. The method according to any one of claims 1 to 5, characterized in that: The determination of the pollution reduction rate of land-based pollutants, the increase rate of engineering emission reduction and the increase rate of basin self-purification based on the maximum allowable inflow into the river, the current inflow into the river, the maximum allowable generation and the current generation includes: The reduction rate of land-based pollutants is calculated based on the maximum allowable generation and current generation of pollutants from each pollution source to its corresponding tributaries; Based on the maximum allowable generation and current generation of pollutants from each pollution source to its corresponding tributary, as well as the maximum allowable and current inflow of pollutants from each tributary to its corresponding river into the sea, the engineering emission reduction rate and the basin self-purification rate of land-based pollutants are calculated; Wherein, the expression of the pollution reduction rate is: The expression of the emission reduction rate of the project is: The expression of the watershed net increase rate is: Where W i,j,k Indicates the current amount of pollutants generated by each pollution source to its corresponding tributary, It represents the maximum allowable amount of pollutants generated by each pollution source to its corresponding tributary, E i,j,k represents the current reduction of pollution from each point source to the tributary, represents the minimum reduction amount from each point source pollution source to the tributary, T i,j,k represents the current degradation amount of each non-point source pollution source to the tributary, It represents the minimum degradation amount from each non-point source of pollution to the tributaries, i, j, k represent the numbers of control units at each level, t represents the year, S and G represent the starting year of emission reduction and the year when the coastal water quality improvement target is achieved, respectively.

8. A land-based pollutant load reduction analysis device, characterized in that: include: The watershed division module is used to divide the bay watershed into the first watershed between each river flowing into the sea and the bay, the second watershed between each tributary and each river flowing into the sea, and the third watershed between each pollution source and each tributary; A determination module is used to determine the maximum allowable amount of pollutants entering the sea from each river entering the sea to the bay, the maximum allowable amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the maximum allowable amount of pollutants generated from each pollution source to its corresponding tributary based on the acquired environmental parameters of the bay basin; An acquisition module is used to obtain the current amount of pollutants entering the sea from each river entering the sea to the bay, the current amount of pollutants entering the river from each tributary to its corresponding river entering the sea, and the current amount of pollutants generated by each pollution source to its corresponding tributary; A calculation module, for determining the required reduction rate of land-based pollutants based on the maximum allowable amount of discharge into the sea and the current amount of discharge into the sea, and for determining the pollution reduction rate, engineering emission reduction rate and basin self-purification rate of land-based pollutants based on the maximum allowable amount of discharge into the river, the current amount of discharge into the river, the maximum allowable amount of discharge and the current amount of discharge; The strategy generation module is used to determine the land-based pollutant load reduction strategy based on the required emission reduction rate, pollution reduction rate, engineering emission reduction increase rate and basin self-purification increase rate.

9. A computer device, characterized in that: It includes a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the land-based pollutant load reduction analysis method described in any one of claims 1 to 6 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the land-based pollutant load reduction analysis method according to any one of claims 1 to 6.

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