A grading method and device for rain and sewage outlets, electronic equipment and storage medium

Abstract

The application provides a grading method and device for a rain and sewage outlet, electronic equipment and a storage medium. The grading method comprises the following steps: obtaining monitoring data of the rain and sewage outlet; calculating the pollution load into a river of the rain and sewage outlet; calculating a pollution load into a river sensitive factor of the rain and sewage outlet; calculating a sensitive factor of the rain and sewage outlet for meeting the water quality standard of a control section; and determining the comprehensive sensitivity grade of the rain and sewage outlet according to the pollution load into a river sensitive factor of the rain and sewage outlet and the sensitive factor of the rain and sewage outlet for meeting the water quality standard of a control section. The application can grade the rain and sewage outlet based on the pollution load into a river sensitive factor of the rain and sewage outlet and the sensitive factor of the rain and sewage outlet for meeting the water quality standard of a control section, evaluate the influence degree of each rain and sewage outlet on a receiving water body, and then use limited pollution reduction to achieve the maximum water quality improvement effect.

Description

Technical Field

[0001] The present application relates to the technical field of grading and classification of rainwater and sewage outlets, and in particular to a grading method, device, electronic equipment and storage medium for rainwater and sewage outlets. Background Art

[0002] With the acceleration of my country's urbanization process, urban water environment problems are becoming increasingly serious, and black and smelly water bodies are common. Rainwater and sewage outlets are the main channels for discharging pollutants into receiving water bodies. In order to improve the water quality of receiving water bodies, rainwater and sewage outlets need to be scientifically managed.

[0003] At present, the method of grading and classifying rainwater and sewage outlets is usually adopted to determine the treatment measures that match each rainwater and sewage outlet. In practice, the rainwater and sewage outlets are mainly classified based on factors such as the drainage system, drainage type, and drainage method of the rainwater and sewage outlets. This classification method can identify the outlet characteristics of rainwater and sewage outlets, and then determine the corresponding treatment measures for each rainwater and sewage outlet based on the outlet characteristics.

[0004] However, this classification method treats each rainwater and sewage outlet as an independent treatment target, and does not consider the overall economic and timeliness of the receiving water body treatment. It cannot solve the technical problem of "how to use limited pollutant emission reduction to achieve the greatest water quality improvement effect." Summary of the Invention

[0005] In view of this, the purpose of the embodiments of the present application is to provide a classification method, device, electronic equipment and storage medium for rainwater and sewage outlets, which can classify rainwater and sewage outlets based on the sensitivity factors of the pollution load into the river at the rainwater and sewage outlets and the sensitivity factors to the water quality compliance of the control section, evaluate the impact of each rainwater and sewage outlet on the receiving water body, and then utilize limited pollutant emission reduction to achieve the maximum water quality improvement effect.

[0006] In a first aspect, an embodiment of the present application provides a method for grading rainwater and sewage outlets, comprising:

[0007] Obtain monitoring data of stormwater and sewage outlets;

[0008] Calculate the pollution load entering the river from the stormwater and sewage outlets;

[0009] Calculate the sensitivity factor of the pollution load into the river from the stormwater and sewage outlets;

[0010] Calculate the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section;

[0011] The comprehensive sensitivity level of the stormwater and sewage outlet is determined based on the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the water quality compliance of the control section.

[0012] In a possible implementation, the calculating of the pollution load entering the river from the stormwater and sewage outlet includes:

[0013] The pollution load i of the rainwater and sewage outlet is calculated by the following formula: pi :

[0014]

[0015] Among them, T1 is the length of the dry season in a year at the location of the rainwater and sewage outlet, L pi1 is the pollution load i of the stormwater and sewage outlet into the river in the dry season (in kg / d), T2 is the length of the rainy season (or rainfall event) in the location of the stormwater and sewage outlet in a year, L pi2 is the pollution load i of the stormwater and sewage outlet in the rainy season (or rainfall event) (in kg / d), S is the catchment area of ​​the stormwater and sewage outlet (in hm2). 2 ), d is the population density of the location of the stormwater and sewage outlet (unit: person / hm2) 2 ), β is the product coefficient (unit: kg / person / d), λ is the sewage inflow coefficient, P is the rainfall (unit: mm / d), is the runoff coefficient, M is the rainwater quality concentration at the stormwater and sewage outlet (in mg / L);

[0016] When the rain and sewage outlets have both dry season direct sewage discharge and rainy season overflow pollution, the assessment scale is year. In this case, T1≠0 and T2≠0. When the rain and sewage outlets do not have dry season direct sewage discharge and only rainy season overflow pollution exists, the assessment scale is rainy season (or rainfall event). In this case, T1=0 and L pi1 =0, T2≠0.

[0017] In a possible implementation manner, the calculating of the pollution load entering the river from the stormwater and sewage outlets further includes:

[0018] The rainfall data at the location of the stormwater and sewage outlet is input into the water quality and quantity model to perform runoff calculations, and the calculation results of the water quality and quantity model are determined as the pollution load into the river from the stormwater and sewage outlet.

[0019] In a possible implementation, the calculating of the pollution load into the river sensitivity factor of the stormwater and sewage outlet includes:

[0020] If the receiving water body of the stormwater and sewage outlet is a river, the pollution load inflow sensitivity factor LSI of the pollution load i of the stormwater and sewage outlet is determined by the following formula: i1 :

[0021]

[0022] The pollution load sensitivity factor LSI of the stormwater and sewage outlet is calculated by the following formula:

[0023] LSI=max(LSI 11 , LSI 21 ,……,LSI n1 );

[0024] Among them, L pi is the pollution load i of the stormwater and sewage outlet into the river, C ei is the surface water quality standard of the pollution load i at the location of the stormwater and sewage outlet (in mg / L), C hi is the concentration of pollution load i in the upper reaches of the river (in mg / L), Q hi is the flow rate of water from the upstream of the river (unit: m 3 / d), n is the total amount of pollution load i of the stormwater and sewage outlet, T1 is the length of the dry season in a year at the location of the stormwater and sewage outlet, and T2 is the length of the rainy season (or rainfall events) in a year at the location of the stormwater and sewage outlet;

[0025] According to the correspondence between the pollution load inflow sensitivity factor of the rainwater and sewage outlet and the first weight value, the pollution load inflow sensitivity factor is updated to the corresponding first weight value.

[0026] In a possible implementation, the calculating of the pollution load into the river sensitivity factor of the stormwater and sewage outlet further includes:

[0027] If the receiving water body of the stormwater and sewage outlet is a lake or a reservoir, the pollution load inflow sensitivity factor LSI of the pollution load i of the stormwater and sewage outlet is determined by the following formula: i2 :

[0028]

[0029] The pollution load sensitivity factor LSI of the stormwater and sewage outlet is calculated by the following formula:

[0030] LSI=max(LSI 12 , LSI 22 ,……,LSI n2 );

[0031] Among them, L pi is the pollution load inflow into the river of the pollution load i of the stormwater and sewage outlet, and n is the total amount of pollution load i of the stormwater and sewage outlet;

[0032] According to the correspondence between the pollution load inflow sensitivity factor of the rainwater and sewage outlet and the first weight value, the pollution load inflow sensitivity factor is updated to the corresponding first weight value.

[0033] In a possible implementation, the calculation of the sensitivity factor of the stormwater and sewage outlet to the compliance of the water quality of the control section includes:

[0034] The sensitivity factor TSI of the pollution load i of the rainwater and sewage outlet to the water quality standard of the control section is determined by the following formula: i :

[0035]

[0036] Among them, L pi is the pollution load i of the stormwater and sewage outlet into the river, N is the number of stormwater and sewage outlets that affect the control section, W i The water environment capacity of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section;

[0037] If the receiving water body of the stormwater and sewage outlet is a river, the water environment capacity W of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i1 (Unit: kg / d):

[0038]

[0039] Among them, C 0i1 is the water quality concentration of the upstream river with pollution load i (in mg / L), Q 01 is the river flow (unit: m 3 / s), q is the flow rate of rainwater and sewage outlet (unit: m 3 / s), C si1 is the target water quality concentration of the control section of pollution load i (in mg / L), K i is the water quality degradation coefficient of pollution load i (unit: 1 / d), x1 is the distance between the location of the stormwater and sewage outlet and the downstream control section (unit: m), and u is the river flow velocity (unit: m / s);

[0040] If the receiving water body of the stormwater and sewage outlet is a lake or reservoir, the water environment capacity W of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i2 (Unit: kg / d):

[0041]

[0042] Among them, C si2 is the target concentration of lake water quality with pollution load i (in mg / L), C0i2 is the current water quality concentration of the lake with pollution load i (in mg / L), K i is the water degradation coefficient of pollution load i (unit: 1 / d), H L is the lake depth (in meters), Φ is the diffusion angle (Φ is determined by the topography of the location of the stormwater and sewage outlet), x2 is the distance from the control section to the sewage outlet into the lake (in meters), Q 02 is the flow rate in and out of the lake when in balance (unit: m 3 / s);

[0043] The sensitivity factor TSI of the stormwater and sewage outlet to the water quality compliance of the control section is calculated by the following formula:

[0044] TSI=max(LSI1,LSI2,…,LSI n );

[0045] Wherein, n is the total amount of pollution load i of the stormwater and sewage outlet;

[0046] According to the correspondence between the sensitivity factor of the stormwater and sewage outlet to the compliance of the water quality of the control section and the second weight value, the sensitivity factor to the compliance of the water quality of the control section is updated to the corresponding second weight value.

[0047] In a possible implementation, determining the comprehensive sensitivity level of the stormwater and sewage outlet based on the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the compliance of the water quality of the control section includes:

[0048] The comprehensive sensitivity factor of the stormwater and sewage outlet is determined by multiplying the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet by the sensitivity factor for the water quality of the control section meeting the standard;

[0049] Based on the correspondence between the comprehensive sensitivity factor and the comprehensive sensitivity level, the comprehensive sensitivity level corresponding to the comprehensive sensitivity factor of the rainwater and sewage outlet is determined.

[0050] In a second aspect, an embodiment of the present application provides a grading device for rainwater and sewage outlets, comprising:

[0051] Acquisition module, used to obtain monitoring data of rainwater and sewage outlets;

[0052] A first calculation module is used to calculate the pollution load entering the river from the stormwater and sewage outlet;

[0053] The second calculation module is used to calculate the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet;

[0054] A third calculation module is used to calculate the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section;

[0055] The determination module is used to determine the comprehensive sensitivity level of the rainwater and sewage outlet according to the sensitivity factor of the pollution load into the river of the rainwater and sewage outlet and the sensitivity factor of the water quality reaching the standard of the control section.

[0056] In a third aspect, an embodiment of the present application provides an electronic device comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the memory through the bus, and the processor executes the machine-readable instructions to perform the steps of the rainwater and sewage outlet grading method described in any one of the first aspects.

[0057] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for grading rainwater and sewage outlets described in any one of the first aspects are executed.

[0058] The embodiments of the present application provide a method, device, electronic device, and storage medium for grading rainwater and sewage outlets, wherein the grading method includes: obtaining monitoring data of rainwater and sewage outlets; calculating the pollution load inflow into a river from the rainwater and sewage outlets; calculating the sensitivity factor of the pollution load inflow into a river from the rainwater and sewage outlets; calculating the sensitivity factor of the rainwater and sewage outlets to the compliance of water quality at a control section; and determining the comprehensive sensitivity level of the rainwater and sewage outlets based on the sensitivity factor of the pollution load inflow into a river from the rainwater and sewage outlets and the sensitivity factor to the compliance of water quality at a control section. The present application can grade rainwater and sewage outlets based on the sensitivity factor of the pollution load inflow into a river from the rainwater and sewage outlets and the sensitivity factor to the compliance of water quality at a control section, evaluate the degree of impact of each rainwater and sewage outlet on the receiving water body, and thereby maximize the water quality improvement effect by utilizing limited pollutant emission reduction.

[0059] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0061] Figure 1 A flow chart showing a method for grading rainwater and sewage outlets provided in an embodiment of the present application is shown;

[0062] Figure 2A flow chart showing another method for grading rainwater and sewage outlets provided in an embodiment of the present application is shown;

[0063] Figure 3 A schematic structural diagram of a rainwater and sewage outlet grading device provided in an embodiment of the present application is shown;

[0064] Figure 4 A schematic diagram of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the 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. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the 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 making creative work are within the scope of protection of this application.

[0066] With the acceleration of my country's urbanization process, urban water environment problems are becoming increasingly serious, and black and smelly water bodies are common. Rainwater and sewage outlets are the main channels for discharging pollutants into receiving water bodies. In order to improve the water quality of receiving water bodies, rainwater and sewage outlets need to be scientifically managed.

[0067] At present, it is usually adopted to classify the rainwater and sewage outlets and determine the treatment measures that match each rainwater and sewage outlet. In practice, the rainwater and sewage outlets are mainly classified based on the drainage system (including separate system and combined system), drainage type (including rainwater, sewage, mixed discharge), drainage method (including direct discharge, overflow) and other factors. For example, the article "Urban Black and Odor Water Body Treatment - Technical Guidelines for the Treatment of Drainage Outlets, Pipes and Inspection Wells (Trial)" mentioned that based on the drainage system, drainage type and drainage method, the rainwater and sewage outlets are divided into separate sewage direct discharge outlets, separate sewage direct discharge outlets and combined sewage direct discharge outlets. Flow system rainwater direct discharge outlet, diversion system rainwater and sewage mixed direct discharge outlet, diversion system rainwater and sewage mixed interception overflow outlet, combined system direct discharge outlet, combined system interception overflow outlet and other outlets (pump station outlet, riverside residential outlet, facility emergency outlet). This classification method can identify the outlet characteristics of rainwater and sewage outlets. Since the problems of rainwater and sewage outlets with different outlet characteristics are different, the corresponding treatment measures of rainwater and sewage outlets with different outlet characteristics are also different. This classification method of rainwater and sewage outlets can determine the treatment measures that match each rainwater and sewage outlet based on the outlet characteristics.

[0068] The "Guidelines for the Treatment of Urban Black and Odor-Rich Water Bodies," compiled in 2015 under the leadership of the Ministry of Housing and Urban-Rural Development, proposed a technical approach of "source control and interception, internal treatment, and ecological restoration," emphasizing "source control and interception" as the fundamental measure for the treatment of urban black and odorous water bodies. While water environment treatment has achieved initial success, improvements remain at a low level. The turning point from quantitative change to qualitative change has not yet arrived, and the recurrence of black and odorous water bodies persists. To effectively improve the effectiveness of water pollution control and achieve long-term cleanliness, precise and scientific pollution control is necessary. How to maximize water quality improvements from limited pollutant emission reductions is a pressing issue for achieving precise pollution control.

[0069] Classifying stormwater and sewage outlets based on their drainage system, type, and method, and then selecting appropriate treatment methods based on their characteristics, this classification treats each outlet as an independent treatment target, failing to consider the overall economic and timeliness of receiving water treatment. This fails to address the aforementioned technical issue of "how to maximize water quality improvements through limited pollutant reduction." In reality, stormwater and sewage outlets are affected by factors such as the amount of pollutant loading entering the river and the quality and quantity of the receiving water, resulting in varying degrees of impact on the water quality of the receiving water. For example, if 10 stormwater and sewage outlets input pollutant loads into a receiving water body, the water quality of that receiving water body can be improved by treating the five outlets with the greatest impact. In this case, considering the economic and time-effectiveness of receiving water body treatment, it is obvious that treating the five outlets is the best choice. This will maximize the water quality improvement effect with limited pollutant reduction. Prioritizing treatment of the stormwater and sewage outlets with the greatest impact on the receiving water body's water quality can achieve twice the result with half the effort. Therefore, grading and classifying stormwater and sewage outlets based on their impact on receiving water quality has become an important research topic in the field of receiving water body treatment.

[0070] In addition, the existing technologies CN210845524U (A system for managing river drainage outlets with high water quality requirements), CN212001483U (A terminal diversion structure for drainage outlets), and CN109761368A (An ecosystem for reducing pollutants from drainage outlets entering a lake) propose methods for managing drainage outlets; CN102628852B (A method for classifying atmospheric pollution sources based on pollutant source identification technology) provides a method for classifying atmospheric pollution sources based on pollutant source identification technology, which evaluates the sensitivity of atmospheric pollution sources and quantitatively classifies them. None of the above existing technologies involve grading and classifying drainage outlets based on the degree of impact on the water quality of the receiving water body.

[0071] Based on the above problems, the embodiments of the present application provide a classification method, device, electronic device and storage medium for rainwater and sewage outlets, wherein the classification method includes: obtaining monitoring data of rainwater and sewage outlets; calculating the pollution load inflow into the river of the rainwater and sewage outlets; calculating the sensitivity factor of the pollution load inflow into the river of the rainwater and sewage outlets; calculating the sensitivity factor of the rainwater and sewage outlets to the compliance of the water quality of the control section; and determining the comprehensive sensitivity level of the rainwater and sewage outlets based on the sensitivity factor of the pollution load inflow into the river of the rainwater and sewage outlets and the sensitivity factor to the compliance of the water quality of the control section. The present application can classify rainwater and sewage outlets based on the sensitivity factor of the pollution load inflow into the river of the rainwater and sewage outlets and the sensitivity factor to the compliance of the water quality of the control section, evaluate the degree of impact of each rainwater and sewage outlet on the receiving water body, and then maximize the water quality improvement effect by utilizing limited pollutant emission reduction.

[0072] The defects in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed by this application for the above problems below should be the contributions made by the inventor to this application during the application process.

[0073] The technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. The components of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely 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 making creative work are within the scope of protection of this application.

[0074] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0075] To facilitate understanding of this embodiment, a classification method for rainwater and sewage outlets disclosed in an embodiment of the present application is first introduced in detail.

[0076] See also Figure 1 As shown, Figure 1 This is a flow chart of a method for grading rainwater and sewage outlets provided in an embodiment of the present application. The grading method includes the following steps:

[0077] S101. Obtain monitoring data of rainwater and sewage outlets.

[0078] S102: Calculate the pollution load entering the river from the stormwater and sewage outlets.

[0079] S103: Calculate the sensitivity factor of the pollution load into the river from the stormwater and sewage outlets.

[0080] S104. Calculate the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section.

[0081] S105. Determine the comprehensive sensitivity level of the stormwater and sewage outlet based on the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the water quality compliance of the control section.

[0082] In summary, steps S101 to S105 are implemented. The embodiment of the present application implements the grading and classification of rainwater and sewage outlets by determining the comprehensive sensitivity levels of the rainwater and sewage outlets. The comprehensive sensitivity levels are used to measure the degree of influence of the rainwater and sewage outlets on the water quality of the receiving water body. When different rainwater and sewage outlets discharge the same pollution load into the receiving water body, the higher the comprehensive sensitivity level of the rainwater and sewage outlet, the greater its influence on the water quality of the receiving water body. When treating the receiving water body, priority is given to reducing the pollution load of rainwater and sewage outlets with high comprehensive sensitivity levels, so that the maximum water quality improvement effect can be achieved by utilizing limited pollutant emission reduction.

[0083] S101. Obtain monitoring data of rainwater and sewage outlets.

[0084] The monitoring data shall at least include: outlet location (coordinates and elevation), catchment area, outlet type, retaining wall form, water level of receiving water body, water quality concentration of receiving water body, flow rate of receiving water body, and water level monitoring data.

[0085] S102: Calculate the pollution load entering the river from the stormwater and sewage outlets.

[0086] In practice, multiple pollution loads may flow through stormwater and sewage outlets simultaneously, and the amount of pollution load entering the river must be calculated separately for each pollution load at the same stormwater and sewage outlet. This embodiment of the application provides two methods for estimating the amount of pollution load entering the river: the coefficient method and the water quality and quantity coupled model simulation method (i.e., the SWMM model simulation method).

[0087] S103: Calculate the sensitivity factor of the pollution load into the river from the stormwater and sewage outlets.

[0088] For each stormwater and sewage outlet, the pollution load inflow sensitivity factor for each type of pollution load is calculated based on the pollution load inflow into the river at that outlet. This is then used to calculate the pollution load inflow sensitivity factor for that stormwater and sewage outlet. Based on the pollution load inflow sensitivity factors, the stormwater and sewage outlets are initially classified.

[0089] S104. Calculate the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section.

[0090] For each stormwater and sewage outlet, the sensitivity factor of each pollutant load at that outlet to the water quality compliance of the control section is calculated first, and then the sensitivity factor of that stormwater and sewage outlet to the water quality compliance of the control section is calculated. Based on the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section, the stormwater and sewage outlets are initially classified.

[0091] S105. Determine the comprehensive sensitivity level of the stormwater and sewage outlet based on the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the water quality compliance of the control section.

[0092] By determining the sensitivity factor of the pollution load entering the river from the stormwater and sewage outlets and the sensitivity factor to the water quality compliance of the control section, the preliminary classification treatment of the stormwater and sewage outlets can be achieved. Taking the above two factors of the stormwater and sewage outlets into consideration, the comprehensive sensitivity level of the stormwater and sewage outlets can be determined, that is, the degree of impact of the stormwater and sewage outlets on the water quality of the receiving water body can be determined.

[0093] The method for grading rainwater and sewage outlets provided in the embodiment of the present application comprehensively considers the sensitivity factors of the pollution load entering the river from the rainwater and sewage outlets and the sensitivity factors to the compliance of the water quality of the control section to determine the comprehensive sensitivity level of the rainwater and sewage outlets. It is a new method for grading rainwater and sewage outlets. Based on the comprehensive sensitivity level, it can determine the degree of influence of the rainwater and sewage outlets on the water quality of the receiving water body, improve the accuracy and timeliness of selecting rainwater and sewage outlets that prioritize reducing pollution load, improve the timeliness, economy and accuracy of the treatment of the receiving water body, utilize limited pollutant emission reduction to maximize the water quality improvement effect, and realize precise pollution control.

[0094] Furthermore, when calculating the pollution load entering the river from the rainwater and sewage outlets, there are two corresponding calculation methods, namely the coefficient method and the water quality and water quantity coupling model simulation method.

[0095] Method 1: Use the coefficient method to calculate the pollution load into the river from the stormwater and sewage outlets:

[0096] The pollution load i of the rainwater and sewage outlet is calculated by the following formula: pi :

[0097]

[0098] Among them, T1 is the length of the dry season in a year at the location of the rainwater and sewage outlet, L pi1 is the pollution load i of the stormwater and sewage outlet into the river in the dry season (in kg / d), T2 is the length of the rainy season (or rainfall event) in the location of the stormwater and sewage outlet in a year, L pi2 is the pollution load i of the stormwater and sewage outlet in the rainy season (or rainfall event) (in kg / d), S is the catchment area of ​​the stormwater and sewage outlet (in hm2). 2), d is the population density of the location of the stormwater and sewage outlet (unit: person / hm2) 2 ), β is the product coefficient (unit: kg / person / d), λ is the sewage inflow coefficient, P is the rainfall (unit: mm / d), is the runoff coefficient, and M is the rainwater quality concentration of the stormwater and sewage outlet (in mg / L).

[0099] When the rain and sewage outlets have both dry season direct sewage discharge and rainy season overflow pollution, the assessment scale is year. In this case, T1≠0 and T2≠0. When the rain and sewage outlets do not have dry season direct sewage discharge and only rainy season overflow pollution exists, the assessment scale is rainy season (or rainfall event). In this case, T1=0 and L pi1 =0, T2≠0.

[0100] Specifically, the pollution load entering the river from the stormwater and sewage outlets includes the pollution load entering the river in the dry season and the pollution load entering the river in the rainy season. Among them, the pollution load entering the river in the dry season is the pollution load entering the river when there is no rainfall, and the pollution load entering the river in the rainy season is the pollution load entering the river during rainfall. If there is both direct sewage discharge in the dry season and overflow pollution in the rainy season, then both the pollution load entering the river in the dry season and the pollution load entering the river in the rainy season are not zero, and the assessment scale is annual. If there is no direct sewage discharge in the dry season and only overflow pollution exists in the rainy season, then the pollution load entering the river in the dry season is zero, and the pollution load entering the river in the rainy season is not zero, and the assessment scale is the rainy season or rainfall event.

[0101] Method 2: Use the water quality and water quantity coupling model simulation method to calculate the pollution load entering the river from the stormwater and sewage outlets:

[0102] The rainfall data at the location of the stormwater and sewage outlet is input into the water quality and quantity model to perform runoff calculations, and the calculation results of the water quality and quantity model are determined as the pollution load into the river from the stormwater and sewage outlet.

[0103] When using water quality and quantity models to calculate the pollution load into the river from stormwater and sewage outlets, the following three aspects are mainly included:

[0104] (1) Model generalization

[0105] The model was constructed for the pipeline network, node inspection wells, catchment areas, storage facilities, and pumping stations, and calibrated using actual monitoring data. Pipeline network data included pipe diameter and upstream and downstream pipe bottom elevations; node inspection well data included ground elevation and well bottom elevation; catchment area data included underlying surface type and percentage of impervious water; storage facility data included storage capacity; and pumping station data included pump characteristic curves. Dry season sewage generation in different catchments was calculated based on population density, catchment area, and per capita daily sewage generation. These data were then supplemented and calculated within the model.

[0106] (2) Parameter setting

[0107] Enter model parameters. Hydraulic model parameters include initial depression depth, Manning's coefficient, percentage of impervious surface, and hydraulic width of the catchment area. For the infiltration model, select the Horton model, with parameters for maximum infiltration rate, minimum infiltration rate, and infiltration attenuation coefficient. Water quality model parameters include accumulation model and washoff model parameters. These parameters should be determined based on actual conditions and in accordance with the parameters provided in the model user manual. Enter rainfall data to calculate runoff and runoff. Compare the calculated results with actual monitoring data and adjust the model parameters until the error tolerance is met.

[0108] (3) Model calculation

[0109] Import rainfall data into the model to perform runoff calculations, and calculate the pollution load entering the river from the rainwater and sewage outlets based on the flow and concentration time series data of the rainwater and sewage outlet nodes. Specifically, calculate the pollution load entering the river from the pollution load i of the rainwater and sewage outlets.

[0110] Furthermore, the types of receiving water bodies include rivers, lakes, reservoirs, etc. The calculation methods of the sensitive factors of the pollution load into rivers from storm and sewage outlets are different for different types of receiving water bodies. The receiving water bodies are divided into two categories: rivers and lakes (reservoirs), and the calculation methods of the sensitive factors of the pollution load into rivers from storm and sewage outlets are introduced respectively.

[0111] Method 1: If the receiving water body of the stormwater and sewage outlet is a river, the pollution load inflow sensitivity factor LSI of the pollution load i of the stormwater and sewage outlet is determined by the following formula: i1 :

[0112]

[0113] The pollution load sensitivity factor LSI of the stormwater and sewage outlet is calculated by the following formula:

[0114] LSI=max(LSI 11 , LSI 21 ,……,LSI n1 );

[0115] Among them, L pi is the pollution load i of the stormwater and sewage outlet into the river, C ei is the surface water quality standard of pollution load i (in mg / L), C hi is the concentration of pollution load i in the upper reaches of the river (in mg / L), Q hi is the flow rate of water from the upstream of the river (unit: m 3 / d), n is the total amount of pollution load i of the stormwater and sewage outlet (in practice, n is usually referred to as the number of types of pollutants), T1 is the length of the dry season in a year at the location of the stormwater and sewage outlet, and T2 is the length of the rainy season (or rainfall events) in a year at the location of the stormwater and sewage outlet.

[0116] According to the correspondence between the pollution load inflow sensitivity factor of the rainwater and sewage outlet and the first weight value, the pollution load inflow sensitivity factor is updated to the corresponding first weight value.

[0117] Specifically, based on the sensitivity factor of pollution load into the river, the rainwater and sewage outlets are initially classified into four levels, namely very sensitive, relatively sensitive, generally sensitive, and insensitive. Each level corresponds to a first weight value (sensitivity factor assignment), which are 1, 3, 5, and 7 respectively.

[0118] Method 2: If the receiving water body of the stormwater and sewage outlet is a lake or reservoir, the pollution load inflow sensitivity factor LSI of the pollution load i of the stormwater and sewage outlet is determined by the following formula: i2 :

[0119]

[0120] The pollution load sensitivity factor LSI of the stormwater and sewage outlet is calculated by the following formula:

[0121] LSI=max(LSI 12 , LSI 22 ,……,LSI n2 );

[0122] Among them, L pi is the pollution load i of the storm and sewage outlet entering the river, and n is the total amount of pollution load i of the storm and sewage outlet.

[0123] According to the correspondence between the pollution load inflow sensitivity factor of the rainwater and sewage outlet and the first weight value, the pollution load inflow sensitivity factor is updated to the corresponding first weight value.

[0124] Specifically, based on the sensitivity factor of pollution load into the river, the rainwater and sewage outlets are initially classified into four levels, namely very sensitive, relatively sensitive, generally sensitive, and insensitive. Each level corresponds to a first weight value (sensitivity factor assignment), which are 1, 3, 5, and 7 respectively.

[0125] Furthermore, the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section is calculated, including:

[0126] The sensitivity factor TSI of the pollution load i of the rainwater and sewage outlet to the water quality standard of the control section is determined by the following formula: i :

[0127]

[0128] Among them, L pi is the pollution load i of the stormwater and sewage outlet into the river, N is the number of stormwater and sewage outlets that affect the control section, W i It is the water environment capacity of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section.

[0129] If the receiving water body of the stormwater and sewage outlet is a river, the water environment capacity W of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i1 (Unit: kg / d):

[0130]

[0131] Among them, C 0i1 is the water quality concentration of the upstream river with pollution load i (in mg / L), Q 01 is the river flow (unit: m 3 / s), q is the flow rate of rainwater and sewage outlet (unit: m 3 / s), C si1 is the target water quality concentration of the control section of pollution load i (in mg / L), K i is the water quality degradation coefficient of pollution load i (unit: 1 / d), x1 is the distance between the location of the stormwater and sewage outlet and the downstream control section (unit: m), and u is the river flow velocity (unit: m / s).

[0132] If the receiving water body of the stormwater and sewage outlet is a lake or reservoir, the water environment capacity W of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i2 (Unit: kg / d):

[0133]

[0134] Among them, C si2 is the target concentration of lake water quality with pollution load i (in mg / L), C 0i2 is the current water quality concentration of the lake with pollution load i (in mg / L), K i is the water degradation coefficient of pollution load i (unit: 1 / d), V is the volume of the lake (unit: m 3 ), Φ is the diffusion angle (Φ is determined by the terrain of the location of the stormwater and sewage outlet), x2 is the distance from the control section to the sewage outlet into the lake (in meters), Q 02 is the flow rate in and out of the lake when in balance (unit: m 3 / s).

[0135] The sensitivity factor TSI of the stormwater and sewage outlet to the water quality compliance of the control section is calculated by the following formula:

[0136] TSI=max(LSI1,LSI2,…,LSI n );

[0137] Wherein, n is the total amount of pollution load i of the rainwater and sewage outlet.

[0138] According to the correspondence between the sensitivity factor of the stormwater and sewage outlet to the compliance of the water quality of the control section and the second weight value, the sensitivity factor to the compliance of the water quality of the control section is updated to the corresponding second weight value.

[0139] Specifically, based on the sensitivity factors of the water quality of the control section, the rainwater and sewage outlets are initially classified into four levels, namely very sensitive, relatively sensitive, generally sensitive, and insensitive. Each level corresponds to a second weight value (sensitivity factor assignment), which are 1, 3, 5, and 7 respectively.

[0140] For further information, see Figure 2 As shown, Figure 2 A flowchart of another method for grading rainwater and sewage outlets provided in an embodiment of the present application, wherein the comprehensive sensitivity level of the rainwater and sewage outlets is determined based on the sensitivity factor of the pollution load into the river of the rainwater and sewage outlets and the sensitivity factor to the water quality compliance of the control section, including:

[0141] S1051. Determine the comprehensive sensitivity factor of the stormwater and sewage outlet as the product of the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor of the water quality of the control section meeting the standard.

[0142] The comprehensive sensitivity factor SI of the rainwater and sewage outlet is calculated by the following formula:

[0143] SI = LSI * TSI;

[0144] Among them, LSI is the sensitivity factor of the pollution load entering the river from the storm and sewage outlets, and TSI is the sensitivity factor of the storm and sewage outlets to the water quality compliance of the control section.

[0145] S1052. Based on the correspondence between the comprehensive sensitivity factor and the comprehensive sensitivity level, determine the comprehensive sensitivity level corresponding to the comprehensive sensitivity factor of the rainwater and sewage outlet.

[0146] Based on the comprehensive sensitivity factor, the rainwater and sewage outlets are classified into four comprehensive sensitivity levels: very sensitive, relatively sensitive, moderately sensitive, and insensitive. Specifically, if SI = 1, the comprehensive sensitivity level of the rainwater and sewage outlet is very sensitive; if 3 ≤ SI ≤ 7, the comprehensive sensitivity level of the rainwater and sewage outlet is relatively sensitive; if 9 ≤ SI ≤ 35, the comprehensive sensitivity level of the rainwater and sewage outlet is moderately sensitive; and if SI = 49, the comprehensive sensitivity level of the rainwater and sewage outlet is insensitive.

[0147] Furthermore, in order to more intuitively and specifically describe the classification method of rainwater and sewage outlets provided in the embodiments of the present application, two embodiments are provided to respectively illustrate the classification process of rainwater and sewage outlets when the receiving water body is a river or a lake.

[0148] Example 1 (receiving water body is a river):

[0149] In recent years, point-source pollution in Beijing's Tongzhou District has been effectively controlled, with water quality in major tributaries and the main stream significantly improving. Fluctuations in river water quality during the year were primarily due to non-point-source pollution during the rainy season, with total phosphorus and ammonia nitrogen levels failing to meet standards during rainfall. While 72 rainwater and sewage outlets into the river do not discharge direct sewage during the dry season, overflow pollution is severe during the rainy season.

[0150] 2. Because the primary source of pollution from stormwater and sewage outfalls is overflow pollution during the rainy season, the estimated time scale for pollution loads entering the river is based on rainfall events. The SWMM model simulation method was used to calculate pollution loads entering the river. Based on the simulation results of three moderate rain events and one heavy rain event in 2020, the pollution loads entering the river through stormwater and sewage outfalls from heavy rain were 114,186.1 tons of SS, 3,099.5 tons of TP, 24,777.5 tons of ammonia nitrogen, and 148,655.3 tons, respectively. The concentrations of SS, TP, ammonia nitrogen, and COD entering the river were 75.8 mg / L, 2.1 mg / L, 16.5 mg / L, and 98.7 mg / L, respectively.

[0151] 3. 72 stormwater and sewage outlets were categorized into four levels based on LSI values, identifying one very sensitive outlet, one relatively sensitive outlet, 18 moderately sensitive outlets, and 52 insensitive outlets. The LSI grading standards are shown in the table below.

[0152]

[0153] 4. 72 stormwater and sewage outlets were categorized into four levels based on TSI values, identifying two very sensitive stormwater and sewage outlets, 11 relatively sensitive stormwater and sewage outlets, 35 moderately sensitive stormwater and sewage outlets, and 35 insensitive stormwater and sewage outlets. The LSI grading standards are shown in the table below.

[0154]

[0155] 5. The 72 stormwater and sewage outlets were divided into four levels according to the SI value, and one very sensitive stormwater and sewage outlet, one relatively sensitive stormwater and sewage outlet, 35 generally sensitive stormwater and sewage outlets, and 35 insensitive stormwater and sewage outlets were identified.

[0156] Example 2 (receiving water body is a lake):

[0157] 1. External pollution in Chaibo Lake primarily comes from point source pollution caused by mixed drainage during the dry season and non-point source pollution from surface runoff during the rainy season. There are 35 stormwater and sewage outlets surrounding the lake, including 13 mixed drainage outlets and 22 rainwater outlets.

[0158] 2. Due to direct discharge during the dry season and overflow during the rainy season from the stormwater and sewage outfalls into the lake, a coefficient method was used to calculate the annual pollution load into the river. The annual COD load into the lake from the 35 outfalls ranged from 1.53 to 773.32 t / a, and the annual ammonia nitrogen load ranged from 0.16 to 16.12 t / a.

[0159] 3. Based on LSI values, the 35 stormwater and sewage outlets were classified into four tiers: three very sensitive stormwater and sewage outlets, two relatively sensitive stormwater and sewage outlets, 13 moderately sensitive stormwater and sewage outlets, and 17 insensitive stormwater and sewage outlets. The LSI grading standards are shown in the table below.

[0160]

[0161] 4. According to the TSI value, the 35 rainwater and sewage outlets are divided into 4 levels, and 12 very sensitive rainwater and sewage outlets, 12 relatively sensitive rainwater and sewage outlets, 11 generally sensitive rainwater and sewage outlets, and 0 insensitive rainwater and sewage outlets are identified.

[0162]

[0163] 5. According to the SI value, the 35 stormwater and sewage outlets were divided into 4 levels, and 3 very sensitive stormwater and sewage outlets, 9 relatively sensitive stormwater and sewage outlets, 23 generally sensitive stormwater and sewage outlets, and 0 insensitive stormwater and sewage outlets were identified.

[0164] Based on the same inventive concept, the embodiment of the present application also provides a grading device for rainwater and sewage outlets corresponding to the grading method for rainwater and sewage outlets. Since the principle of solving the problem by the device in the embodiment of the present application is similar to the grading method for rainwater and sewage outlets in the embodiment of the present application, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0165] See also Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a grading device for rainwater and sewage outlets provided in an embodiment of the present application, the grading device comprising:

[0166] Acquisition module 301, for acquiring monitoring data of rainwater and sewage outlets;

[0167] The first calculation module 302 is used to calculate the pollution load entering the river from the stormwater and sewage outlet;

[0168] The second calculation module 303 is used to calculate the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet;

[0169] The third calculation module 304 is used to calculate the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section;

[0170] The determination module 305 is used to determine the comprehensive sensitivity level of the stormwater and sewage outlet according to the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the water quality compliance of the control section.

[0171] In a possible implementation, when calculating the pollution load entering the river from the stormwater and sewage outlet, the first calculation module 302 includes:

[0172] The pollution load i of the rainwater and sewage outlet is calculated by the following formula: pi :

[0173]

[0174] Among them, T1 is the length of the dry season in a year at the location of the rainwater and sewage outlet, L pi1 is the pollution load i of the stormwater and sewage outlet into the river in the dry season (in kg / d), T2 is the length of the rainy season (or rainfall event) in the location of the stormwater and sewage outlet in a year, L pi2 is the pollution load i of the stormwater and sewage outlet in the rainy season (or rainfall event) (in kg / d), S is the catchment area of ​​the stormwater and sewage outlet (in hm2). 2 ), d is the population density of the location of the stormwater and sewage outlet (unit: person / hm2) 2 ), β is the product coefficient (unit: kg / person / d), λ is the sewage inflow coefficient, P is the rainfall (unit: mm / d), is the runoff coefficient, M is the rainwater quality concentration at the stormwater and sewage outlet (in mg / L);

[0175] When the rain and sewage outlets have both dry season direct sewage discharge and rainy season overflow pollution, the assessment scale is year. In this case, T1≠0 and T2≠0. When the rain and sewage outlets do not have dry season direct sewage discharge and only rainy season overflow pollution exists, the assessment scale is rainy season (or rainfall event). In this case, T1=0 and L pi1 =0, T2≠0.

[0176] In a possible implementation, when calculating the pollution load entering the river from the stormwater and sewage outlet, the first calculation module 302 further includes:

[0177] The rainfall data at the location of the stormwater and sewage outlet is input into the water quality and quantity model to perform runoff calculations, and the calculation results of the water quality and quantity model are determined as the pollution load into the river from the stormwater and sewage outlet.

[0178] In a possible implementation, when calculating the sensitivity factor of the pollution load into the river at the stormwater and sewage outlet, the second calculation module 303 includes:

[0179] If the receiving water body of the stormwater and sewage outlet is a river, the pollution load inflow sensitivity factor LSI of the pollution load i of the stormwater and sewage outlet is determined by the following formula: i1 :

[0180]

[0181] The pollution load sensitivity factor LSI of the stormwater and sewage outlet is calculated by the following formula:

[0182] LSI=max(LSI 11 , LSI 21 ,……,LSI n1 );

[0183] Among them, L pi is the pollution load i of the stormwater and sewage outlet into the river, C ei is the surface water quality standard of the pollution load i at the location of the stormwater and sewage outlet (in mg / L), C hi is the concentration of pollution load i in the upper reaches of the river (in mg / L), Q hi is the flow rate of water from the upstream of the river (unit: m 3 / d), n is the total amount of pollution load i of the stormwater and sewage outlet, T1 is the length of the dry season in a year at the location of the stormwater and sewage outlet, and T2 is the length of the rainy season (or rainfall events) in a year at the location of the stormwater and sewage outlet;

[0184] According to the correspondence between the pollution load inflow sensitivity factor of the rainwater and sewage outlet and the first weight value, the pollution load inflow sensitivity factor is updated to the corresponding first weight value.

[0185] In a possible implementation, when calculating the sensitivity factor of the pollution load into the river at the stormwater and sewage outlet, the second calculation module 303 further includes:

[0186] If the receiving water body of the stormwater and sewage outlet is a lake or a reservoir, the pollution load inflow sensitivity factor LSI of the pollution load i of the stormwater and sewage outlet is determined by the following formula: i2 :

[0187]

[0188] The pollution load sensitivity factor LSI of the stormwater and sewage outlet is calculated by the following formula:

[0189] LSI=max(LSI 12 , LSI 22 ,……,LSI n2 );

[0190] Among them, L pi is the pollution load inflow into the river of the pollution load i of the stormwater and sewage outlet, and n is the total amount of pollution load i of the stormwater and sewage outlet;

[0191] According to the correspondence between the pollution load inflow sensitivity factor of the rainwater and sewage outlet and the first weight value, the pollution load inflow sensitivity factor is updated to the corresponding first weight value.

[0192] In a possible implementation, the third calculation module 304, when calculating the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section, includes:

[0193] The sensitivity factor TSI of the pollution load i of the rainwater and sewage outlet to the water quality standard of the control section is determined by the following formula: i :

[0194]

[0195] Among them, L pi is the pollution load i of the stormwater and sewage outlet into the river, N is the number of stormwater and sewage outlets that affect the control section, W i The water environment capacity of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section;

[0196] If the receiving water body of the stormwater and sewage outlet is a river, the water environment capacity W of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i1 (Unit: kg / d):

[0197]

[0198] Among them, C 0i1 is the water quality concentration of the upstream river with pollution load i (in mg / L), Q 01 is the river flow (unit: m 3 / s), q is the flow rate of rainwater and sewage outlet (unit: m 3 / s), C si1 is the target water quality concentration of the control section of pollution load i (in mg / L), K i is the water quality degradation coefficient of pollution load i (unit: 1 / d), x1 is the distance between the location of the stormwater and sewage outlet and the downstream control section (unit: m), and u is the river flow velocity (unit: m / s);

[0199] If the receiving water body of the stormwater and sewage outlet is a lake or reservoir, the water environment capacity W of the pollution load i between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i2 (Unit: kg / d):

[0200]

[0201] Among them, C si2 is the target concentration of lake water quality with pollution load i (in mg / L), C 0i2 is the current water quality concentration of the lake with pollution load i (in mg / L), K i is the water degradation coefficient of pollution load i (unit: 1 / d), H L is the lake depth (in meters), Φ is the diffusion angle (Φ is determined by the topography of the location of the stormwater and sewage outlet), x2 is the distance from the control section to the sewage outlet into the lake (in meters), Q 02 is the flow rate in and out of the lake when in balance (unit: m 3 / s);

[0202] The sensitivity factor TSI of the stormwater and sewage outlet to the water quality compliance of the control section is calculated by the following formula:

[0203] TSI=max(LSI1,LSI2,…,LSI n );

[0204] Wherein, n is the total amount of pollution load i of the stormwater and sewage outlet;

[0205] According to the correspondence between the sensitivity factor of the stormwater and sewage outlet to the compliance of the water quality of the control section and the second weight value, the sensitivity factor to the compliance of the water quality of the control section is updated to the corresponding second weight value.

[0206] In a possible implementation, when determining the comprehensive sensitivity level of the stormwater and sewage outlet based on the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the compliance of the water quality of the control section, the determination module 305 includes:

[0207] The comprehensive sensitivity factor of the stormwater and sewage outlet is determined by multiplying the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet by the sensitivity factor for the water quality of the control section meeting the standard;

[0208] Based on the correspondence between the comprehensive sensitivity factor and the comprehensive sensitivity level, the comprehensive sensitivity level corresponding to the comprehensive sensitivity factor of the rainwater and sewage outlet is determined.

[0209] The grading device for rainwater and sewage outlets provided in the embodiment of the present application comprehensively considers the sensitivity factors of the pollution load entering the river from the rainwater and sewage outlets and the sensitivity factors to the compliance of the water quality of the control section to determine the comprehensive sensitivity level of the rainwater and sewage outlets. It is a new rainwater and sewage outlet grading method. Based on the comprehensive sensitivity level, it can determine the degree of influence of the rainwater and sewage outlets on the water quality of the receiving water body, improve the accuracy and timeliness of selecting rainwater and sewage outlets that prioritize reducing pollution load, improve the timeliness, economy and accuracy of the treatment of the receiving water body, utilize limited pollutant emission reduction to maximize the water quality improvement effect, and realize precise pollution control.

[0210] See also Figure 4 As shown, Figure 4 A schematic diagram of an electronic device provided in an embodiment of the present application, wherein the electronic device 400 includes: a processor 401, a memory 402 and a bus 403, wherein the memory 402 stores machine-readable instructions executable by the processor 401. When the electronic device is running, the processor 401 communicates with the memory 402 via the bus 403, and the processor 401 executes the machine-readable instructions to perform the steps of the above-mentioned method for grading rainwater and sewage outlets.

[0211] Specifically, the above-mentioned memory 402 and processor 401 can be general-purpose memories and processors, which are not specifically limited here. When the processor 401 runs the computer program stored in the memory 402, it can execute the above-mentioned classification method for rainwater and sewage outlets.

[0212] Corresponding to the above-mentioned classification method for rainwater and sewage outlets, an embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, the steps of the above-mentioned classification method for rainwater and sewage outlets are executed.

[0213] 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 aforementioned method embodiment, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0214] 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, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected to achieve the purpose of this embodiment according to actual needs.

[0215] In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0216] If the functions are implemented 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 that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0217] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A classification method for rainwater and sewage outlets, characterized in that: include: Obtain monitoring data of stormwater and sewage outlets; Calculate the pollution load entering the river from the stormwater and sewage outlets; Calculate the sensitivity factor of the pollution load into the river from the stormwater and sewage outlets; Calculate the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section; Determining the comprehensive sensitivity level of the stormwater and sewage outlet based on the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the water quality compliance of the control section; The calculation of the pollution load into the river from the stormwater and sewage outlets includes: The pollution load of the rainwater and sewage outlet is calculated by the following formula: i Pollution load into the river L pi : L pi = T 1* L pi1 + T 2 * L pi2 = T 1*（ S * d * β * λ ）+ T 2 *（ S * d * β * λ + S * P * φ * M / 100）； in, L pi1 The pollution load of the stormwater and sewage outlet i Pollution load into the river during the dry season, L pi1 The unit is kg / day, L pi2 The pollution load of the stormwater and sewage outlet i The amount of pollution load entering the river during the rainy season or rainfall event, L pi2 The unit is kg / day, S is the catchment area of ​​the stormwater and sewage outlet, S The unit is hm 2 , d is the population density of the location of the stormwater and sewage outlet, d Unit: person / hm 2 , β is the product coefficient, β The unit is kg / person / day, λ is the sewage inflow coefficient, P is the rainfall, P The unit is mm / day, φ is the runoff coefficient, M is the rainwater quality concentration at the stormwater and sewage outlet, M The unit is mg / L; When the sewage outlet has both dry season direct sewage discharge and rainy season overflow pollution, the assessment scale is annual. T 1≠0, T 2 ≠0; when there is no direct discharge of sewage in the dry season from the rainwater and sewage outlet, and only overflow pollution in the rainy season exists, the assessment scale is the rainy season or rainfall event. T 1=0, L pi1 =0, T 2 ≠0; The calculation of the pollution load entering the river from the stormwater and sewage outlets also includes: Inputting rainfall data at the location of the stormwater and sewage outlet into a water quality and quantity model to perform runoff calculations, and determining the calculation results of the water quality and quantity model as the pollution load into the river from the stormwater and sewage outlet; The calculation of the sensitivity factor of the pollution load into the river from the stormwater and sewage outlet includes: If the receiving water body of the stormwater and sewage outlet is a river, the pollution load of the stormwater and sewage outlet is determined by the following formula: i Sensitivity factor of pollution load into the river LSI i1 : ； The sensitivity factor of the pollution load into the river at the stormwater and sewage outlet is calculated by the following formula: LSI : LSI = max （ LSI 11 、 LSI 21 、……、 LSI n1 ）； in, L pi The pollution load of the stormwater and sewage outlet i The amount of pollution loading into the river, C ei The pollution load at the location of the stormwater and sewage outlet i Surface water quality standards, C ei The unit is mg / L, C hi Pollution load upstream of the river i The concentration of C hi The unit is mg / L, Q hi is the flow rate of water from the upper reaches of the river, Q hi Unit is m 3 / day, n The pollution load of the stormwater and sewage outlet i The total amount, T 1 is the length of the dry season in a year at the location of the stormwater and sewage outlet, T 2 The length of the rainy season or rainfall events in a year at the location of the stormwater and sewage outlet. T 1. T 2 The unit is day; According to the correspondence between the pollution load inflow sensitivity factor of the stormwater and sewage outlet and the first weight value, updating the pollution load inflow sensitivity factor to the corresponding first weight value; The calculation of the pollution load into the river sensitivity factor of the stormwater and sewage outlet also includes: If the receiving water body of the stormwater and sewage outlet is a lake or a reservoir, the pollution load of the stormwater and sewage outlet is determined by the following formula: i Sensitivity factor of pollution load into the river LSI i2 : ； The sensitivity factor of the pollution load into the river at the stormwater and sewage outlet is calculated by the following formula: LSI : LSI = max （ LSI 12 、 LSI 22 、……、 LSI n2 ）； in, L pi The pollution load of the stormwater and sewage outlet i The amount of pollution loading into the river, n The pollution load of the stormwater and sewage outlet i the total amount; According to the correspondence between the pollution load inflow sensitivity factor of the stormwater and sewage outlet and the first weight value, updating the pollution load inflow sensitivity factor to the corresponding first weight value; The calculation of the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section includes: The pollution load of the stormwater and sewage outlet is determined by the following formula: i Sensitive factors for water quality compliance at control sections TSI i : ； in, L pi The pollution load of the stormwater and sewage outlet i The amount of pollution loading into the river, N is the number of rainwater and sewage outlets that affect the control section, W i The pollution load between the location of the rainwater and sewage outlet and the downstream control section i water environment capacity; If the receiving water body of the stormwater and sewage outlet is a river, the pollution load between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i Water environment capacity W i1 , W i1 The unit is kg / day: ； in, C 0i1 Pollution load i The water quality concentration of the upstream river, C 0i1 The unit is mg / L, Q 01 is the river flow, Q 01 Unit is m 3 / s, q is the flow rate of the rainwater and sewage outlet, q Unit is m 3 / s, C si1 Pollution load i The target concentration of water quality in the control section is C si1 The unit is mg / L, K i Pollution load i The water degradation coefficient, K i The unit is 1 / day, x 1 is the distance between the location of the rainwater and sewage outlet and the downstream control section, x 1 The unit is m, u is the river flow velocity, u The unit is m / s; If the receiving water body of the stormwater and sewage outlet is a lake or reservoir, the pollution load between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i Water environment capacity W i2 , W i2 The unit is kg / day: ； in, C si2 Pollution load i The target concentration of lake and reservoir water quality is C si2 The unit is mg / L, C 0i2 Pollution load i The current water quality concentration of the lake, C 0i2 The unit is mg / L, K i Pollution load i The water degradation coefficient, K i The unit is 1 / day, H L is the lake depth, H L The unit is m, Φ is the diffusion angle, Φ Determined by the topography of the location of the stormwater and sewage outlet, x 2 To control the distance from the section to the sewage outlet into the lake, x 2 The unit is m, Q 02 The flow in and out of the lake is balanced. Q 02 Unit is m 3 / s; The sensitivity factor of the stormwater and sewage outlet to the water quality standard of the control section is calculated by the following formula: TSI : TSI = max （ LSI 1 、 LSI 2 、……、 LSI n ）； in, n The pollution load of the stormwater and sewage outlet i the total amount; According to the correspondence between the sensitivity factor of the stormwater and sewage outlet to the compliance of the water quality of the control section and the second weight value, the sensitivity factor to the compliance of the water quality of the control section is updated to the corresponding second weight value.

2. The classification method according to claim 1, characterized in that Determining the comprehensive sensitivity level of the stormwater and sewage outlet based on the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and the sensitivity factor to the water quality compliance of the control section includes: The comprehensive sensitivity factor of the stormwater and sewage outlet is determined by multiplying the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet by the sensitivity factor for the water quality of the control section meeting the standard; Based on the correspondence between the comprehensive sensitivity factor and the comprehensive sensitivity level, the comprehensive sensitivity level corresponding to the comprehensive sensitivity factor of the rainwater and sewage outlet is determined.

3. A classification device for rainwater and sewage outlets, characterized in that: include: Acquisition module, used to obtain monitoring data of rainwater and sewage outlets; A first calculation module is used to calculate the pollution load entering the river from the stormwater and sewage outlet; The second calculation module is used to calculate the sensitivity factor of the pollution load into the river of the stormwater and sewage outlet; A third calculation module is used to calculate the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section; a determination module, configured to determine a comprehensive sensitivity level of the stormwater and sewage outlet based on a sensitivity factor of the pollution load into the river of the stormwater and sewage outlet and a sensitivity factor to the water quality compliance of the control section; The first calculation module, when calculating the pollution load entering the river from the stormwater and sewage outlet, includes: The pollution load of the rainwater and sewage outlet is calculated by the following formula: i Pollution load into the river L pi : L pi = T 1* L pi1 + T 2 * L pi2 = T 1*（ S * d * β * λ ）+ T 2 *（ S * d * β * λ + S * P * φ * M / 100）； in, L pi1 The pollution load of the stormwater and sewage outlet i Pollution load into the river during the dry season, L pi1 The unit is kg / day, L pi2 The pollution load of the stormwater and sewage outlet i The amount of pollution load entering the river during the rainy season or rainfall event, L pi2 The unit is kg / day, S is the catchment area of ​​the stormwater and sewage outlet, S The unit is hm 2 , d is the population density of the location of the stormwater and sewage outlet, d Unit: person / hm 2 , β is the product coefficient, β The unit is kg / person / day, λ is the sewage inflow coefficient, P is the rainfall, P The unit is mm / day, φ is the runoff coefficient, M is the rainwater quality concentration at the stormwater and sewage outlet, M The unit is mg / L; When the sewage outlet has both dry season direct sewage discharge and rainy season overflow pollution, the assessment scale is annual. T 1≠0, T 2 ≠0; when there is no direct discharge of sewage in the dry season from the rainwater and sewage outlet, and only overflow pollution in the rainy season exists, the assessment scale is the rainy season or rainfall event. T 1=0, L pi1 =0, T 2 ≠0; The first calculation module, when calculating the pollution load entering the river from the stormwater and sewage outlet, further includes: Inputting rainfall data at the location of the stormwater and sewage outlet into a water quality and quantity model to perform runoff calculations, and determining the calculation results of the water quality and quantity model as the pollution load into the river from the stormwater and sewage outlet; The second calculation module, when calculating the sensitivity factor of the pollution load into the river from the stormwater and sewage outlet, includes: If the receiving water body of the stormwater and sewage outlet is a river, the pollution load of the stormwater and sewage outlet is determined by the following formula: i Sensitivity factor of pollution load into the river LSI i1 : ； The sensitivity factor of the pollution load into the river at the stormwater and sewage outlet is calculated by the following formula: LSI : LSI = max （ LSI 11 、 LSI 21 、……、 LSI n1 ）； in, L pi The pollution load of the stormwater and sewage outlet i The amount of pollution loading into the river, C ei The pollution load at the location of the stormwater and sewage outlet i Surface water quality standards, C ei The unit is mg / L, C hi Pollution load upstream of the river i The concentration of C hi The unit is mg / L, Q hi is the flow rate of water from the upper reaches of the river, Q hi Unit is m 3 / day, n The pollution load of the stormwater and sewage outlet i The total amount, T 1 is the length of the dry season in a year at the location of the stormwater and sewage outlet, T 2 The length of the rainy season or rainfall events in a year at the location of the stormwater and sewage outlet. T 1. T 2 The unit is day; According to the correspondence between the pollution load inflow sensitivity factor of the stormwater and sewage outlet and the first weight value, updating the pollution load inflow sensitivity factor to the corresponding first weight value; The second calculation module, when calculating the sensitivity factor of the pollution load into the river from the stormwater and sewage outlet, further includes: If the receiving water body of the stormwater and sewage outlet is a lake or a reservoir, the pollution load of the stormwater and sewage outlet is determined by the following formula: i Sensitivity factor of pollution load into the river LSI i2 : ； The sensitivity factor of the pollution load into the river at the stormwater and sewage outlet is calculated by the following formula: LSI : LSI = max （ LSI 12 、 LSI 22 、……、 LSI n2 ）； in, L pi The pollution load of the stormwater and sewage outlet i The amount of pollution loading into the river, n The pollution load of the stormwater and sewage outlet i the total amount; According to the correspondence between the pollution load inflow sensitivity factor of the stormwater and sewage outlet and the first weight value, updating the pollution load inflow sensitivity factor to the corresponding first weight value; The third calculation module, when calculating the sensitivity factor of the stormwater and sewage outlet to the water quality compliance of the control section, includes: The pollution load of the stormwater and sewage outlet is determined by the following formula: i Sensitive factors for water quality compliance at control sections TSI i : ； in, L pi The pollution load of the stormwater and sewage outlet i The amount of pollution loading into the river, N is the number of rainwater and sewage outlets that affect the control section, W i The pollution load between the location of the rainwater and sewage outlet and the downstream control section i water environment capacity; If the receiving water body of the stormwater and sewage outlet is a river, the pollution load between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i Water environment capacity W i1 , W i1 The unit is kg / day: ； in, C 0i1 Pollution load i The water quality concentration of the upstream river, C 0i1 The unit is mg / L, Q 01 is the river flow, Q 01 Unit is m 3 / s, q is the flow rate of the rainwater and sewage outlet, q Unit is m 3 / s, C si1 Pollution load i The target concentration of water quality in the control section is C si1 The unit is mg / L, K i Pollution load i The water degradation coefficient, K i The unit is 1 / day, x 1 is the distance between the location of the rainwater and sewage outlet and the downstream control section, x 1 The unit is m, u is the river flow velocity, u The unit is m / s; If the receiving water body of the stormwater and sewage outlet is a lake or reservoir, the pollution load between the location of the stormwater and sewage outlet and the downstream control section is determined by the following formula: i Water environment capacity W i2 , W i2 The unit is kg / day: ； in, C si2 Pollution load i The target concentration of lake and reservoir water quality is C si2 The unit is mg / L, C 0i2 Pollution load i The current water quality concentration of the lake, C 0i2 The unit is mg / L, K i Pollution load i The water degradation coefficient, K i The unit is 1 / day, H L is the lake depth, H L The unit is m, Φ is the diffusion angle, Φ Determined by the topography of the location of the stormwater and sewage outlet, x 2 To control the distance from the section to the sewage outlet into the lake, x 2 The unit is m, Q 02 The flow in and out of the lake is balanced. Q 02 Unit is m 3 / s; The sensitivity factor of the stormwater and sewage outlet to the water quality standard of the control section is calculated by the following formula: TSI : TSI = max （ LSI 1 、 LSI 2 、……、 LSI n ）； in, n The pollution load of the stormwater and sewage outlet i the total amount; According to the correspondence between the sensitivity factor of the stormwater and sewage outlet to the compliance of the water quality of the control section and the second weight value, the sensitivity factor to the compliance of the water quality of the control section is updated to the corresponding second weight value.

4. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein 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 method for grading rainwater and sewage outlets as described in any one of claims 1 to 2.

5. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, executes the steps of the method for grading rainwater and sewage outlets according to any one of claims 1 to 2.

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