A control unit grading method and device for urban water environment treatment

Abstract

The application provides a control unit grading method and device for urban water environment treatment, which comprises the following steps: calculating the pollution load influence value of the control unit according to the pollution load input of the control unit and the water body information of the control unit; calculating the pollution treatment economic value of the control unit according to the economic information of the treatment project of the control unit; determining the ecological environment sensitive value of the control unit according to the ecological environment sensitive target located in the water environment treatment area and the category of the ecological environment zoning control unit; calculating the sensitivity grade of the control unit according to the pollution load influence value, the pollution treatment economic value, the ecological environment sensitive value of the control unit and the corresponding weight coefficients respectively; and displaying the sensitivity grade of the control unit by using GIS. The application comprehensively considers the pollution load contribution degree, the economic sensitivity and the ecological environment sensitivity to grade the control unit, so that the graded control unit is suitable for urban water environment treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water environment management and water pollution prevention and control, and particularly relates to a control unit grading method and device for urban water environment treatment. BACKGROUND

[0002] At present, when treating water environment, the water area to be treated is usually divided into a plurality of small-area control units for treatment, and then the control units are classified and graded, and finally different treatment methods are adopted based on the level and category of the control units to realize water environment treatment.

[0003] At present, the classification and grading of the control units are usually based on factors related to pollution sources such as water environment problem severity, water resource endowment, population and industrial concentration, and importance of pollutants.

[0004] In cities, water areas have various functions, and when treating urban water environment, factors related to pollution sources are not the only ones to be considered. Therefore, the existing control unit classification and grading method is not suitable for urban water environment treatment. SUMMARY

[0005] Therefore, the embodiments of the present application aim to provide a control unit grading method and device for urban water environment treatment, which grades the control units by comprehensively considering the pollution load contribution degree, economic sensitivity, and ecological environment sensitivity, so that the graded control units can be suitable for urban water environment treatment.

[0006] In a first aspect, the embodiments of the present application provide a control unit grading method for urban water environment treatment, which comprises:

[0007] According to the pollution load input of the control unit and the water body information of the control unit, the pollution load influence value of the control unit is calculated;

[0008] According to the economic information of the treatment project of the control unit, the pollution treatment economic value of the control unit is calculated;

[0009] According to the category of the ecological environment sensitive target and the ecological environment zoning control unit located in the water environment treatment area, the ecological environment sensitive value of the control unit located in the water environment treatment area is determined;

[0010] According to the pollution load influence value, the pollution treatment economic value, and the ecological environment sensitive value of the control unit, and the weight coefficients of the pollution load influence value, the pollution treatment economic value, and the ecological environment sensitive value, the sensitivity grade of the control unit is calculated;

[0011] The sensitivity level of the control unit is displayed using GIS.

[0012] In one possible implementation, calculating the pollution load impact value of the control unit based on the pollution load input of the control unit and the water body information of the control unit includes:

[0013] The control unit is calculated using the following formula. i Pollution load impact value LSI i :

[0014] ;

[0015] in, L i For the control unit i The amount of pollution load input, W i For the control unit i The water environment capacity of the water body between the pollution load inflow point and the nearest downstream control section. N This refers to the number of control units that have an impact on the receiving water body.

[0016] In one possible implementation, calculating the pollution control economic value of the control unit based on the economic information of the pollution control project of the control unit includes:

[0017] The control unit is calculated using the following formula. i The economic value of pollution control ESI i :

[0018] ESI i = B i / C i ;

[0019] in, B i For control unit i The engineering benefits of the governance project C i For control unit i The cost of the treatment project.

[0020] In one possible implementation, determining the ecological sensitivity value of a control unit located within the water environment management area based on ecologically sensitive targets within the water environment management area and the category of ecological environment zoning control units includes:

[0021] acquire ecological environment sensitive targets located in the water environment management area, and a category of the ecological environment zoning control unit; wherein the category of the ecological environment zoning control unit comprises a priority control unit, a key control unit, and a general control unit;

[0022] if the control unit contains one or more ecological environment sensitive targets, and the control unit is a priority control unit or a key control unit, the ecological environment sensitive value of the control unit is determined as a preset first sensitive value;

[0023] if the control unit contains one or more ecological environment sensitive targets, or the control unit is a priority control unit or a key control unit, the ecological environment sensitive value of the control unit is determined as a preset second sensitive value;

[0024] if the control unit does not contain ecological environment sensitive targets, and / or the control unit is a general control unit, the ecological environment sensitive value of the control unit is determined as a preset third sensitive value.

[0025] In a possible implementation, the water environment management area comprises a city area and a non-city area, and before the step of calculating the pollution load impact value of the control unit according to the pollution load input of the control unit and the water body information of the control unit, the method further comprises:

[0026] for the non-city area, a digital terrain analysis is performed on a regional digital elevation model by using GIS to obtain a watershed catchment zoning map, and based on the watershed catchment zoning map, the non-city area is divided into a plurality of control units;

[0027] for the city area, the city area is divided into a plurality of control units based on drainage zoning;

[0028] based on the administrative boundary in the water environment management area, the drainage zoning flow direction, and the treatment range of the sewage treatment facility, the control units satisfying the merging condition are merged, and the control units are updated.

[0029] In a possible implementation, before the step of calculating the pollution load impact value of the control unit according to the pollution load input of the control unit and the water body information of the control unit, the method further comprises:

[0030] determining an out-of-standard control section water quality index and a water environment management assessment index located in the water environment management area as a sensitive water quality index;

[0031] calculating the pollution load impact value of the control unit under each sensitive water quality index.

[0032] In a possible implementation, the sensitivity level of the control unit is calculated according to the pollution load impact value, the pollution treatment economic value, the ecological environment sensitive value of the control unit, and the weight coefficients of the pollution load impact value, the pollution treatment economic value, and the ecological environment sensitive value, and the sensitivity level of the control unit is calculated according to the pollution load impact value, the pollution treatment economic value, the ecological environment sensitive value of the control unit, and the weight coefficients of the pollution load impact value, the pollution treatment economic value, and the ecological environment sensitive value.

[0033] The sensitivity level of the control unit is calculated by the following formula i V i :

[0034] V i = C p × P i + C f × F i + C e × E i ;

[0035] wherein, C p is the weight coefficient of the pollution load impact value, C f is the weight coefficient of the pollution treatment economic value, C e is the weight coefficient of the ecological environment sensitive value, P i is the normalized processing result of the pollution load impact value of the control unit i , F i is the normalized processing result of the pollution treatment economic value of the control unit i , E i is the normalized processing result of the ecological environment sensitive value of the control unit i .

[0036] In a second aspect, the embodiments of the present application provide a control unit grading device for urban water environment treatment, and the device comprises:

[0037] A first calculation module is configured to calculate a pollution load impact value of a control unit according to a pollution load input of the control unit and water body information of the control unit.

[0038] A second calculation module is configured to calculate a pollution treatment economic value of the control unit according to economic information of a treatment project of the control unit.

[0039] ​The first determining module is configured to determine an ecological environment sensitive value of a control unit located in the water environment treatment area according to an ecological environment sensitive target located in the water environment treatment area and a category of the ecological environment partition control unit.

[0040] The third calculating module is configured to calculate a sensitivity grade of the control unit according to the pollution load influence value, the pollution treatment economic value, the ecological environment sensitive value of the control unit, and weight coefficients of the pollution load influence value, the pollution treatment economic value, and the ecological environment sensitive value.

[0041] The display module is configured to display the sensitivity grade of the control unit by using GIS.

[0042] In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, and a bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, and the processor executes the machine readable instructions to perform the steps of the control unit grading device for urban water environment treatment in any one of the first aspect.

[0043] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is executed by a processor to perform the steps of the control unit grading device for urban water environment treatment in any one of the first aspect.

[0044] The control unit grading method and device for urban water environment treatment provided by the embodiments of the present application can grade the control unit by comprehensively considering the pollution load contribution degree, the economic sensitivity, and the ecological environment sensitivity, and the graded control unit can be applied to urban water environment treatment.

[0045] In order to make the above objectives, characteristics and advantages of the present application more apparent and understandable, the following will describe preferred embodiments in detail, and the accompanying drawings will be described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0047] Figure 1 A flow chart of a control unit grading method for urban water environment treatment provided by an embodiment of the present application is shown;

[0048] Figure 2 A flow chart of another control unit grading method for urban water environment treatment provided by an embodiment of the present application is shown;

[0049] Figure 3 A structural schematic diagram of a control unit grading device for urban water environment treatment provided by an embodiment of the present application is shown;

[0050] Figure 4 A schematic diagram of an electronic device provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions, and superiorities of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described below in connection with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0052] At present, when treating water environment, the water area to be treated is usually divided into multiple small control units for treatment, and then the control units are graded and classified, and finally different treatment methods are adopted based on the level and category of the control units to realize water environment treatment.

[0053] At present, the grading and classification of the control units are usually based on factors related to pollution sources, such as water environment problem severity, water resource endowment, population and industrial concentration, and importance of pollutants.

[0054] In cities, the role of water area is more diverse, and when treating urban water environment, not only the factors of pollution sources are considered, therefore, the existing control unit grading and classification method is not applicable to urban water environment treatment.

[0055] Based on the above problems, the embodiment of the present application provides a control unit grading method and device for urban water environment treatment. The control unit is graded by comprehensively considering the pollution load contribution degree, economic sensitivity and ecological environment sensitivity, so that the graded control unit can be suitable for urban water environment treatment. When grading the control unit, the pollution load contribution degree considers the influencing factors of the pollution source and the spatial difference between different control units and control sections; the economic sensitivity considers the economy of the water environment treatment project; and the ecological environment sensitivity considers the ecological environment sensitivity of the location of the control unit. The pollution source, the spatial difference between the control unit and the control section, the economy and the ecological environment sensitivity are comprehensively considered to realize the grading and classification of the control unit.

[0056] The defects of the above solutions are the results of the inventors after practice and careful research, and therefore, the discovery process of the above problems and the solutions proposed by the present application to solve the above problems should be the contributions of the inventors to the present application.

[0057] The technical solutions in the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0058] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0059] In order to facilitate the understanding of the present embodiment, first, a control unit grading method for urban water environment treatment disclosed by the embodiment of the present application is introduced in detail.

[0060] Referring to Figure 1 As shown in the figure, Figure 1 A flow chart of a control unit grading method for urban water environment treatment provided by the embodiment of the present application is shown. The method comprises the following steps:

[0061] S101, according to the pollution load input of the control unit and the water body information of the control unit, the pollution load influence value of the control unit is calculated.

[0062] In the treatment of urban water environment and black and odorous water, the river basin in the water environment treatment area is divided into multiple control units, and water environment treatment is realized for each control unit.

[0063] For different control units, the factors to be considered in water environment treatment, such as pollution degree, treatment difficulty, treatment cost, and ecological sensitivity, may be different. Based on the above factors to be considered in water environment treatment, the control units are classified and treated, and different methods are used for water environment treatment of control units of different levels to realize fine management and control of urban water environment treatment.

[0064] In the embodiments of the application, the control units are classified and graded by comprehensively considering the influence degree of pollution load of the control units on the water quality of the control section, the economy of pollution treatment project, and the sensitivity of ecological environment. Specifically, the pollution load influence value is used to reflect the influence degree of pollution load on the water quality of the control section, the pollution treatment economic value is used to reflect the economy of pollution treatment project, and the ecological environment sensitivity value is used to reflect the sensitivity of ecological environment. The control section is a water flow section at a specified position in the water area, and the water quality index of the water area is collected at the control section. The pollution degree and treatment effect of the water area are analyzed based on the collected water quality index.

[0065] Specifically, in the calculation of the pollution load influence value of the control unit, the pollution load input quantity of the control unit and the water body information of the control unit are obtained, and the water body information includes the water body water environment capacity between the pollution load river input position of the control unit and the nearest control section downstream, and the number of control units that have an impact on the receiving water body. The water body information considers the spatial difference between different control units and control sections. Based on the pollution load input quantity and the water body information, the influence degree of the pollution load of the control unit on the water quality of the control section is analyzed, the pollution load influence value is calculated, and the greater the influence degree of the pollution load of the control unit on the water quality of the control section, the greater the pollution load influence value.

[0066] S102, calculate the pollution treatment economic value of the control unit according to the economic information of the treatment project of the control unit.

[0067] The economic information of the treatment project of the control unit includes project benefits and project costs, and the higher the treatment cost of the control unit, the greater the pollution treatment economic value calculated based on the economic information of the treatment project.

[0068] S103, determine the ecological environment sensitivity value of the control unit located in the water environment treatment area according to the ecological environment sensitive target located in the water environment treatment area and the category of the ecological environment zoning control unit.

[0069] The ecological environment sensitive target is specified by national and local laws and regulations or is an area that needs special protection delimited by a people's government above the county level. The categories of the ecological environment zoning control unit include a priority control unit, a key control unit and a general control unit. The ecological environment sensitivity of the priority control unit is stronger than that of the key control unit, and the ecological environment sensitivity of the key control unit is stronger than that of the general control unit. The ecological environment sensitivity is analyzed based on the number of ecological environment sensitive targets contained in the control unit and the category of the ecological environment zoning control unit to which the control unit belongs, and the ecological environment sensitive value is calculated.

[0070] In S104, the sensitivity level of the control unit is calculated according to the pollution load impact value, the pollution treatment economic value and the ecological environment sensitive value of the control unit and the weight coefficients of the pollution load impact value, the pollution treatment economic value and the ecological environment sensitive value.

[0071] The water environment treatment level of the control unit is comprehensively analyzed from the three dimensions of the pollution load impact value, the pollution treatment economic value and the ecological environment sensitive value. Since the pollution load impact value, the pollution treatment economic value and the ecological environment sensitive value have different importance in determining the level of the control unit, different weight coefficients are set for the three values. The weight coefficients can be set according to the actual situation. The greater the sensitivity level value of the control unit is, the stronger the environmental sensitivity of the control unit is, and the higher the sensitivity level of the control unit is.

[0072] In S105, the sensitivity level of the control unit is displayed by using GIS.

[0073] In the water area image, the sensitivity level of the control unit is displayed by using GIS software, so that the sensitivity level of the control unit is more obvious.

[0074] The control unit grading method for urban water environment treatment provided in the embodiments of the application can grade the control unit by comprehensively considering the pollution load contribution degree, the economic sensitivity and the ecological environment sensitivity, so that the graded control unit can be applied to urban water environment treatment.

[0075] Further, the pollution load impact value of the control unit is calculated according to the pollution load input of the control unit and the water body information of the control unit, and the pollution load impact value of the control unit is calculated according to the pollution load input of the control unit and the water body information of the control unit.

[0076] The pollution load impact value of the control unit is calculated by using the following formula: i LSI i :

[0077] ;

[0078] wherein, L i the pollution load impact value of the control unit​i the pollution load input quantity, W i the control unit i the water environmental capacity of the water body between the pollution load input location and the nearest control section downstream, N the number of control units that have an impact on the receiving water body.

[0079] the pollution load input quantity L i The pollution load input quantity includes point source pollution load and non-point source pollution load, and the non-point source pollution load includes urban storm runoff pollution, rural domestic pollution, farmland runoff pollution, scattered livestock and poultry breeding pollution, and atmospheric dry and wet deposition. For non-point source pollution load, the pollution load input quantity L i The estimation can be based on population, land use type, etc. The emission factor method can be used for estimation, and mathematical models can also be used to calculate the pollution load input quantity.

[0080] Method one: using the emission coefficient method to estimate the pollution load input quantity.

[0081] The pollution load input quantity includes domestic pollution source, agricultural non-point source, and urban non-point source input quantity. The control unit i the pollution load input quantity L i The calculation formula is as follows:

[0082] ;

[0083] ;

[0084] ;

[0085] ;

[0086] Among them, the domestic pollution source input quantity of the control unit i , the agricultural non-point source pollution source input quantity of the control unit i , the urban non-point source pollution source input quantity of the control unit i ; the population quantity of the control unit i , the domestic sewage product coefficient, the domestic sewage input river coefficient; the livestock quantity of the control unit i , the aquaculture area of the control unit i , the control uniti the farmland area, the livestock and poultry pollution coefficient, the breeding pollution coefficient, the farmland pollution coefficient, the agricultural non-point source pollution coefficient; the control unit i the land type j the land area, land type j contains n types of construction land, green land, road, etc. the land type j the land product coefficient, the urban non-point source pollution coefficient.

[0087] Method two, using mathematical model method to estimate pollution load input.

[0088] Through the construction of regional water quality and quantity coupling model to simulate the pollution quantity and concentration into the river, and the model is verified by monitoring data. Specifically:

[0089] (1) Model generalization and overall model parameter setting

[0090] Build the structure model of pipe network, node, catchment area, storage facilities, and pump station, and set the parameters in the model. The pipe network input data is pipe diameter, upstream and downstream pipe bottom elevation; The node inspection well input data is ground elevation, well bottom elevation; The catchment area input data is the type of underlying surface, impermeable surface percentage; The storage facilities input data is storage capacity; The pump station input data is the characteristic curve of water pump.

[0091] According to the population density, catchment area, and daily sewage production per capita, calculate the sewage production in dry season of different catchment areas, and take the calculation results as the initial data of the model.

[0092] (2) Sub-model parameter setting

[0093] The model built in (1) is the overall model, which includes multiple sub-models, including: hydraulic model, infiltration model, and water quality model. The parameters of the above sub-models are set: the hydraulic model parameters include initial ponding depth, Manning coefficient, impermeable surface percentage, and catchment area hydraulic width; The infiltration model selects the Horton model, and the parameters include maximum infiltration rate, minimum infiltration rate, and infiltration decay coefficient; The water quality model parameters include cumulative model parameters and flushing model parameters. The parameters of the above sub-models need to be determined according to the actual situation and the parameters provided in the model user manual.

[0094] (3) Model training

[0095] The rainfall data is input into the model for runoff yield calculation, and the calculation result of runoff yield is compared with the actual monitoring result of runoff yield. If the error does not meet the error requirement, the model parameters are adjusted and checked until the error requirement is met.

[0096] (4) Model calculation

[0097] The rainfall data is input into the trained model for runoff yield calculation. The runoff yield is the data of the rain and sewage outlet node within a period of time. For example, the runoff yield of rain and sewage outlet node 1 within 1 day, and the pollution load into the river is the data of the control unit within a period of time. For example, the pollution load into the river of the control unit (including rain and sewage outlet node 1 and rain and sewage outlet node 2) within 1 month. First, the sum of the runoff yield of rain and sewage outlet node 1 and rain and sewage outlet node 2 within 30 consecutive days is calculated to obtain a first sum and a second sum. Then, the sum of the first sum and the second sum is calculated to obtain the pollution load into the river of the control unit.

[0098] The water environmental capacity is the water environmental capacity between the pollution load into the river position of the control unit and the nearest control section downstream. The method for calculating the pollution load influence value based on the water environmental capacity considers the spatial difference between different control units and control sections. The water environmental capacity of the control unit is calculated by using a one-dimensional water quality mathematical model W :

[0099] ;

[0100] wherein, W is the water environmental capacity between the outlet position (pollution load into the river position) and the nearest control section downstream, and the unit is kg / d; C 01 is the upstream river water quality concentration, and the unit is mg / L; Q 01 is the river flow, and the unit is m 3 / s; q is the rain and sewage outlet flow, and the unit is m 3 / s; C s1 is the control section water quality target concentration, and the unit is mg / L; K is the water quality degradation coefficient, and the unit is 1 / d; x is the distance between the rain and sewage outlet and the control section, and the unit is m; u is the river flow rate, and the unit is m / s.

[0101] When the control section is located in a lake and a reservoir, the water environmental capacity is the maximum lake load of the control unit without affecting the water quality of the control section to meet the standard. The water environmental capacity of the control unit is calculated by using the following formula W :

[0102] ;

[0103] wherein, C s2 is the target concentration of water quality of the lake or reservoir, in mg / L; C 02 is the current concentration of water quality of the lake or reservoir, in mg / L; K is the degradation coefficient of water quality, in 1 / d; H L is the depth of the lake, in m; φ is the diffusion angle, determined by the terrain near the discharge outlet; r is the distance from the control section to the discharge outlet into the lake, in m; Q 02 is the flow balance between the inflow and outflow of the lake or reservoir, in m 3 / s.

[0104] Further, the pollution control economic value of the control unit is calculated according to the economic information of the control unit, including:

[0105] The pollution control economic value of the control unit i is calculated by the following formula ESI i :

[0106] ESI i = B i / C i ;

[0107] wherein, B i is the engineering benefit of the control unit i , C i is the engineering cost of the control unit i .

[0108] The economic efficiency of the pollution control measure of the control unit is evaluated by the benefit / cost comparison method, wherein the engineering benefit B i and the engineering cost C i are both in ten thousand yuan.

[0109] Further, the ecological environment sensitive value of the control unit located in the water environment management area is determined according to the ecological environment sensitive target located in the water environment management area and the category of the ecological environment zoning and control unit, including:

[0110] acquire ecological environment sensitive targets located in the water environment management area, and a category of the ecological environment zoning control unit; wherein the category of the ecological environment zoning control unit comprises a priority control unit, a key control unit, and a general control unit.

[0111] If the control unit contains one or more ecological environment sensitive targets, and the control unit is a priority control unit or a key control unit, the ecological environment sensitive value of the control unit is determined as a preset first sensitive value.

[0112] If the control unit contains one or more ecological environment sensitive targets, or the control unit is a priority control unit or a key control unit, the ecological environment sensitive value of the control unit is determined as a preset second sensitive value.

[0113] If the control unit does not contain ecological environment sensitive targets, and / or the control unit is a general control unit, the ecological environment sensitive value of the control unit is determined as a preset third sensitive value.

[0114] According to the number of ecological environment sensitive targets located in the control unit and the category of the ecological environment zoning control unit to which the control unit belongs, the ecological sensitivity of the control unit is judged, and the control unit is divided into three categories: an ecological environment sensitive control unit, an ecological environment generally sensitive control unit, and an ecological environment insensitive control unit. Optionally, the ecological environment sensitive value of the ecological environment sensitive control unit is the first sensitive value 1, the ecological environment sensitive value of the ecological environment generally sensitive control unit is the second sensitive value 0.75, and the ecological environment sensitive value of the ecological environment insensitive control unit is the third sensitive value 0.5.

[0115] Further, the water environment management area comprises a city area and a non-city area, and before the step of calculating the pollution load influence value of the control unit according to the pollution load input of the control unit and the water body information of the control unit, the following steps are included:

[0116] For the non-city area, a digital terrain analysis is performed on a regional digital elevation model using GIS to obtain a watershed catchment zoning map, and based on the watershed catchment zoning map, the non-city area is divided into a plurality of control units.

[0117] For the city area, based on drainage zoning, the city area is divided into a plurality of control units.

[0118] Based on the administrative boundaries in the water environment management area, the drainage zoning flow direction, and the treatment range of the sewage treatment facility, the control units that meet the merging conditions are merged, and the control units are updated.

[0119] First, a plurality of control units are preliminarily divided. Since there is a difference between the basins located in urban areas and non-urban areas, for non-urban areas, the preliminary division of control units is realized based on the catchment zoning map of the basin; for urban areas, the preliminary division of control units is realized based on drainage zoning, for example, based on the city network, each drainage zoning is determined as a control unit. After the preliminary division of control units is completed, the following three merging conditions are considered. Condition one, whether the control units are located in the same administrative boundary, determine the administrative boundary for dividing the control units according to the actual situation, such as a community, merge the control units located in the same administrative boundary; Condition two, whether the pollution influence range of the control units is the same, merge the control units with the same pollution influence range, for example, the control unit is a drainage zoning, if multiple drainage zonings converge into the same outlet, the above multiple drainage zonings are determined as one control unit; Condition three, whether the control units are treated by the same sewage treatment facility, merge multiple control units treated by the same sewage treatment facility. The control units merged based on the above three conditions and other control units not merged are determined as the final control units.

[0120] Further, before the step of calculating the pollution load influence value of the control unit according to the pollution load input of the control unit and the water body information of the control unit, the method further comprises:

[0121] The water quality indicators of the control section located in the water environment management area that exceed the standard and the water environment management evaluation indicators are determined as sensitive water quality indicators; the pollution load influence value of the control unit under each sensitive water quality indicator is calculated.

[0122] Further, the calculation of the sensitivity grade of the control unit according to the pollution load influence value, the pollution control economic value, the ecological environment sensitive value of the control unit, and the weight coefficients of the pollution load influence value, the pollution control economic value, and the ecological environment sensitive value comprises:

[0123] The sensitivity grade of the control unit is calculated by the following formula: i V i :

[0124] V i = C p × P i + C f × F i + C e × E i ;​

[0125] wherein, C p is a weight coefficient of the pollution load impact value, C f is a weight coefficient of the pollution treatment economic value, C e is a weight coefficient of the ecological environment sensitive value, P i is a normalized processing result of the pollution load impact value of the control unit i , F i is a normalized processing result of the pollution treatment economic value of the control unit i , E i is a normalized processing result of the ecological environment sensitive value of the control unit i .

[0126] After the pollution load impact value of the control unit is normalized, the pollution load impact value is mapped to [0, 1], and the control unit is divided according to the size of the normalized processing result X1 of the pollution load impact value: when X1∈[0, 0.5), the control unit is a low pollution contribution degree control unit; when X1∈[0.5, 0.75], the control unit is a general pollution contribution degree control unit; when X1∈(0.75, 1], the control unit is a high pollution contribution degree control unit.

[0127] After the pollution treatment economic value of the control unit is normalized, the pollution treatment economic value is mapped to [0, 1], and the control unit is divided according to the size of the normalized processing result X2 of the pollution treatment economic value: when X2∈[0, 0.5), the control unit is a low economic sensitivity control unit; when X2∈[0.5, 0.75], the control unit is a general economic sensitivity control unit; when X2∈(0.75, 1], the control unit is a high economic sensitivity control unit.

[0128] The sensitivity level i of the control unit V i is greater, the higher the level of the control unit, and the control unit is graded based on the size of the sensitivity level V i . For example, when V i is greater than a first threshold value, the control unit is a first level; when V i is between the first threshold value and a second threshold value, the control unit is a second level; when V i is greater than the second threshold value, the control unit is a third level.

[0129] As a possible implementation, refer to Figure 2 as shown, Figure 2 The flow chart of another control unit grading method for urban water environment treatment provided by the embodiment of the present application, the control unit grading method comprises:

[0130] S201, dividing control units in a water environment treatment area;

[0131] S202, identifying sensitive water quality indicators in the water environment treatment area;

[0132] S203, calculating pollution load impact values of the control units;

[0133] S204, calculating pollution treatment economic values of the control units;

[0134] S205, calculating ecological environment sensitive values of the control units;

[0135] S206, comprehensively evaluating sensitivity grades of the control units according to the pollution load impact values, the pollution treatment economic values and the ecological environment sensitive values of the control units;

[0136] S207, drawing a grading map of the control units based on GIS.

[0137] Based on the same inventive concept, the embodiment of the present application also provides a control unit grading device for urban water environment treatment corresponding to the control unit grading method for urban water environment treatment. Since the principle of solving problems in the device of the embodiment of the present application is similar to the above-mentioned control unit grading method for urban water environment treatment, the implementation of the device can be referred to the implementation of the method, and the repeated parts will not be described here.

[0138] As shown in Figure 3 as shown, Figure 3 The structure diagram of a control unit grading device for urban water environment treatment provided by the embodiment of the present application, the device comprises:

[0139] The first calculation module 301 is configured to calculate pollution load impact values of the control units according to pollution load input values of the control units and water body information of the control units;

[0140] The second calculation module 302 is configured to calculate pollution treatment economic values of the control units according to economic information of treatment projects of the control units;

[0141] The first determination module 303 is configured to determine ecological environment sensitive values of the control units in the water environment treatment area according to ecological environment sensitive targets in the water environment treatment area and categories of ecological environment zoning control units;

[0142] The third calculation module 304 is used to calculate the sensitivity level of the control unit based on the pollution load impact value, pollution control economic value, ecological environment sensitivity value of the control unit, and the weighting coefficients of the pollution load impact value, the pollution control economic value, and the ecological environment sensitivity value.

[0143] Display module 305 is used to display the sensitivity level of the control unit using GIS.

[0144] In one possible implementation, the first calculation module 301, when calculating the pollution load impact value of the control unit based on the pollution load input of the control unit and the water body information of the control unit, includes:

[0145] The control unit is calculated using the following formula. i Pollution load impact value LSI i :

[0146] ;

[0147] in, L i For the control unit i The amount of pollution load input, W i For the control unit i The water environment capacity of the water body between the pollution load inflow point and the nearest downstream control section. N This refers to the number of control units that have an impact on the receiving water body.

[0148] In one possible implementation, the second calculation module 302, when calculating the pollution control economic value of the control unit based on the economic information of the control unit's pollution control project, includes:

[0149] The control unit is calculated using the following formula. i The economic value of pollution control ESI i :

[0150] ESI i = B i / C i ;

[0151] in, B i For control unit i The engineering benefits of the governance project C i For control unit iThe engineering cost of the governance project.

[0152] In a possible implementation, the first determining module 303, when determining the ecological environment sensitive value of the control unit located in the water environment governance region according to the category of the ecological environment sensitive target and the ecological environment partition control unit located in the water environment governance region, comprises the following steps:

[0153] obtaining the category of the ecological environment sensitive target and the ecological environment partition control unit located in the water environment governance region; wherein the category of the ecological environment partition control unit comprises a priority control unit, a key control unit and a general control unit;

[0154] if the control unit contains one or more ecological environment sensitive targets and the control unit is a priority control unit or a key control unit, the ecological environment sensitive value of the control unit is determined as a preset first sensitive value;

[0155] if the control unit contains one or more ecological environment sensitive targets or the control unit is a priority control unit or a key control unit, the ecological environment sensitive value of the control unit is determined as a preset second sensitive value;

[0156] if the control unit does not contain an ecological environment sensitive target and / or the control unit is a general control unit, the ecological environment sensitive value of the control unit is determined as a preset third sensitive value.

[0157] In a possible implementation, the water environment governance region comprises a city region and a non-city region, and the device further comprises:

[0158] the first division module is configured to, for the non-city region, obtain a watershed catchment partition map by performing digital terrain analysis on a regional digital elevation model using GIS, and divide the non-city region into a plurality of control units based on the watershed catchment partition map;

[0159] the second division module is configured to, for the city region, divide the city region into a plurality of control units based on drainage partition;

[0160] the merging and updating module is configured to merge the control units that meet the merging conditions and update the control units based on the administrative boundary in the water environment governance region, the drainage partition flow direction and the treatment range of the sewage treatment facility.

[0161] In a possible implementation, the device further comprises:

[0162] The second determining module is used to determine the water quality indicators of the control sections that exceed the standards within the water environment management area, as well as the water environment management assessment indicators, as sensitive water quality indicators.

[0163] The fourth calculation module is used to calculate the pollution load impact value of the control unit under various sensitive water quality indicators.

[0164] In one possible implementation, the third calculation module 304, when calculating the sensitivity level of the control unit based on the pollution load impact value, pollution control economic value, and ecological environment sensitivity value of the control unit, and the weighting coefficients of the pollution load impact value, the pollution control economic value, and the ecological environment sensitivity value, includes:

[0165] The control unit is calculated using the following formula. i Sensitivity level V i :

[0166] V i = C p × P i + C f × F i + C e × E i ;

[0167] in, C p The weighting coefficients for the impact of pollution load are... C f The weighting coefficient for the economic value of pollution control. C e The weighting coefficients for ecological and environmental sensitivity values. P i For control unit i The normalized results of the pollution load impact values F i For control unit i The normalized results of the economic value of pollution control E i For control unit i The results of normalization of the ecological environment sensitivity values.

[0168] The control unit grading device for town water environment treatment provided by the embodiment of the application can grade the control units by comprehensively considering the pollution load contribution degree, economic sensitivity and ecological environment sensitivity, so that the graded control units can be suitable for town water environment treatment.

[0169] Referring to Figure 4 as shown, Figure 4 The embodiment of the application provides a schematic diagram of an electronic device, and the electronic device 400 comprises a processor 401, a memory 402 and a bus 403, the memory 402 stores machine readable instructions executable by the processor 401, when the electronic device is running, the processor 401 and the memory 402 communicate through the bus 403, and the processor 401 executes the machine readable instructions to execute the steps of the control unit grading method for town water environment treatment.

[0170] Specifically, the memory 402 and the processor 401 can be general memory and processor, which are not limited here, when the processor 401 runs the computer program stored in the memory 402, the control unit grading method for town water environment treatment can be executed.

[0171] Corresponding to the control unit grading method for town water environment treatment, the embodiment of the application further provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is executed by the processor to execute the steps of the control unit grading method for town water environment treatment.

[0172] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here. In several embodiments provided in the application, it should be understood that the disclosed system, device and method can be implemented by other ways. The device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some communication interface, device or module, which can be electrical, mechanical or other forms.

[0173] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0174] In addition, the functional modules in each embodiment of the present application can be integrated in one processing module, or each module can be physically present alone, or two or more modules can be integrated in one module.

[0175] If the functions are realized in the form of software function modules and sold or used as independent products, they can be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, and various program code storage media.

[0176] Finally, it should be noted that: the above-described embodiments are merely specific embodiments of the present application, used to illustrate the technical solutions of the present application, and not to limit them. The protection scope of the present application is not limited thereto, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any skilled person familiar with the technology in the art can modify or easily think of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacements to some technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hierarchical method for control unit in urban water environment management, characterized in that, The method comprises: calculating a pollution load influence value of the control unit according to pollution load input of the control unit and water body information of the control unit; calculating a pollution treatment economic value of the control unit according to economic information of treatment engineering of the control unit; determining an ecological environment sensitive value of the control unit located in the water environment treatment area according to an ecological environment sensitive target and a category of ecological environment partition control unit located in the water environment treatment area; calculating a sensitivity grade of the control unit according to the pollution load influence value, the pollution treatment economic value, the ecological environment sensitive value of the control unit and weight coefficients of the pollution load influence value, the pollution treatment economic value and the ecological environment sensitive value; displaying the sensitivity grade of the control unit by using GIS; The method comprises: The pollution load influence value of the control unit is calculated using the following equation i LSI i :​ ； wherein, L i the control unit i pollution load input quantity, W i the control unit i water environmental capacity of the water body between the pollution load input location and the nearest control section downstream, N the number of control units that have an impact on the receiving water body; The method comprises: The pollution control economic value of the control unit is calculated by the following formula i ESI i :​ ESI i = B i / C i ； wherein B i the control unit i the engineering benefit of the governance project, C i the control unit i the engineering cost of the governance project; The method comprises: obtaining an ecological environment sensitive target and a category of ecological environment partition control unit located in the water environment treatment area; wherein the category of ecological environment partition control unit comprises a priority control unit, a key control unit and a general control unit; if the control unit contains one or more than one ecological environment sensitive target and the control unit is the priority control unit or the key control unit, the ecological environment sensitive value of the control unit is determined as a preset first sensitive value; if the control unit contains one or more than one ecological environment sensitive target or the control unit is the priority control unit or the key control unit, the ecological environment sensitive value of the control unit is determined as a preset second sensitive value; if the control unit does not contain the ecological environment sensitive target and / or the control unit is the general control unit, the ecological environment sensitive value of the control unit is determined as a preset third sensitive value.

2. The hierarchical method for control unit of town water environment treatment according to claim 1, characterized in that, The water environment treatment area comprises a city area and a non-city area, and before the step of calculating the pollution load influence value of the control unit according to the pollution load input of the control unit and the water body information of the control unit, the method comprises: for the non-city area, a flow catchment partition map is obtained by using GIS to perform digital terrain analysis on a regional digital elevation model, and the non-city area is divided into multiple control units based on the flow catchment partition map; for the city area, the city area is divided into multiple control units based on drainage partition; control units meeting merging conditions are merged based on administrative boundaries in the water environment treatment area, drainage partition flow directions and treatment ranges of sewage treatment facilities, and the control units are updated.

3. The hierarchical method for control unit of town water environment treatment according to claim 1, wherein, Before the step of calculating the pollution load influence value of the control unit according to the pollution load input of the control unit and the water body information of the control unit, the method further comprises: determining the water quality indexes of the control section exceeding the standard and the water environment management evaluation indexes in the water environment management area as sensitive water quality indexes; calculating the pollution load influence value of the control unit under each sensitive water quality index.

4. The hierarchical method for control unit of town water environment treatment according to claim 1, wherein, The step of calculating the sensitivity grade of the control unit according to the pollution load influence value, the pollution control economic value and the ecological environment sensitive value of the control unit and the weight coefficients of the pollution load influence value, the pollution control economic value and the ecological environment sensitive value comprises: The sensitivity level of the control unit is calculated using the following formula i V i :​ V i = C p × P i + C f × F i + C e × E i ； wherein, C p is a weight coefficient of the pollution load impact value, C f is a weight coefficient of the pollution treatment economic value, C e is a weight coefficient of the ecological environment sensitive value, P i is a normalization processing result of the pollution load impact value of the control unit i , F i is a normalization processing result of the pollution treatment economic value of the control unit i , E i is a normalization processing result of the ecological environment sensitive value of the control unit i .

5. A control unit hierarchical device for urban water environment management, characterized by, The device comprises: a first calculation module configured to calculate the pollution load influence value of the control unit according to the pollution load input of the control unit and the water body information of the control unit; a second calculation module configured to calculate the pollution control economic value of the control unit according to the economic information of the management project of the control unit; a first determination module configured to determine the ecological environment sensitive value of the control unit in the water environment management area according to the ecological environment sensitive target in the water environment management area and the category of the ecological environment zoning management unit; a third calculation module configured to calculate the sensitivity grade of the control unit according to the pollution load influence value, the pollution control economic value and the ecological environment sensitive value of the control unit and the weight coefficients of the pollution load influence value, the pollution control economic value and the ecological environment sensitive value; a display module configured to display the sensitivity grade of the control unit by using GIS; The first calculation module comprises the following steps when calculating the pollution load influence value of the control unit according to the pollution load input of the control unit and the water body information of the control unit: The pollution load influence value of the control unit is calculated by the following equation i LSI i :​ ； wherein, L i the control unit i pollution load input quantity, W i the control unit i water environmental capacity of the water body between the pollution load input position and the nearest control section downstream, N the number of control units that have an impact on the receiving water body; The second calculation module comprises the following steps when calculating the pollution control economic value of the control unit according to the economic information of the management project of the control unit: The pollution control economic value of the control unit is calculated by the following formula i ESI i :​ ESI i = B i / C i ； wherein, B i the control unit i the engineering benefit of the governance engineering, C i the control unit i the engineering cost of the governance engineering; The first determination module comprises the following steps when determining the ecological environment sensitive value of the control unit in the water environment management area according to the ecological environment sensitive target in the water environment management area and the category of the ecological environment zoning management unit: obtaining the ecological environment sensitive target in the water environment management area and the category of the ecological environment zoning management unit; wherein the category of the ecological environment zoning management unit comprises a priority management unit, a key management unit and a general management unit; if the control unit contains one or more ecological environment sensitive targets and the control unit is a priority management unit or a key management unit, the ecological environment sensitive value of the control unit is determined as a preset first sensitive value; if the control unit contains one or more ecological environment sensitive targets or the control unit is a priority management unit or a key management unit, the ecological environment sensitive value of the control unit is determined as a preset second sensitive value; If the control unit does not contain an eco-environment sensitive target, and / or the control unit is a general control unit, the eco-environment sensitive value of the control unit is determined as a preset third sensitive value.

6. An electronic device, comprising: The method comprises the following steps: The processor, the memory and the bus, the memory stores machine readable instructions executable by the processor, when the electronic device runs, the processor and the memory communicate through the bus, the processor executes the machine readable instructions, to execute the steps of the control unit grading method for the urban water environment treatment as claimed in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, which is executed by the processor to perform the steps of the control unit grading method for the urban water environment treatment as claimed in any one of claims 1 to 4.

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