A method, device, medium and product for determining total volume of a catch basin based on urban initial rainwater interception standard

Abstract

This application discloses a method, equipment, medium, and product for determining the total volume of an interception pool based on urban initial stormwater interception standards, relating to the field of interception facility management. The method includes: identifying key pollutants based on water quality and flow monitoring data; constructing a cumulative rainfall-cumulative runoff relationship diagram; constructing a cumulative pollutant flushing volume-cumulative rainfall relationship diagram based on water quality and flow monitoring data; constructing a net interception rainfall-interception ratio-rainfall relationship diagram for the study area; determining key rainfall intervals based on the pollutant flux and water quality of each rainfall event; determining the initial stormwater interception standard based on the net interception rainfall-interception ratio-rainfall relationship diagram and the key rainfall intervals; and determining the total volume of the interception pool based on the initial stormwater interception standard. This application can reduce non-point source pollution load while improving the operational efficiency and management level of interception facilities.

Description

Technical Field

[0001] This application relates to the field of interception facility management, and in particular to a method, equipment, medium and product for determining the total volume of an interception pool based on urban initial rainwater interception standards. Background Technology

[0002] With the acceleration of urbanization, urban rainwater runoff pollution has become a major source of non-point source pollution, severely impacting the urban water environment. Initial rainwater carries large amounts of pollutants, such as sediment, heavy metals, and organic matter, at concentrations far exceeding those of general sewage. Direct discharge of such pollutants would seriously disrupt the ecological balance of receiving water bodies.

[0003] In recent years, although some progress has been made in urban river flood control and non-point source pollution prevention, the formulation of initial stormwater interception standards still faces many challenges. Relevant regulations clearly stipulate that mathematical modeling should be used to model the catchment area to optimize interception design, but the domestic standard system for initial stormwater runoff management is still incomplete, and there is a lack of systematic research on pollution characteristics and management requirements.

[0004] Existing methods for determining initial stormwater interception standards have numerous problems. For example, empirical methods lack localized adjustments, making them difficult to adapt to varying rainfall characteristics and drainage system differences across regions; model boundary conditions do not match reality, leading to inaccurate simulation results; interception standards are disconnected from the water quality targets of receiving water bodies, failing to effectively guarantee water quality; and one-size-fits-all standards lack management flexibility, making it difficult to adjust flexibly according to actual conditions. These problems ultimately lead to unreasonable design of stormwater storage tank sizes, potentially resulting in wasted investment or failure to achieve expected pollution control targets. This impacts the operational efficiency and economy of urban drainage systems, as well as the urban ecological environment and residents' quality of life, necessitating urgent improvement and optimization.

[0005] Therefore, a scientific, scalable, and site-specific method for determining initial stormwater interception standards is needed to optimize urban drainage systems, reduce non-point source pollution loads, and improve the operational efficiency and management level of interception facilities, thereby providing strong support for the sustainable development of the urban water environment. Summary of the Invention

[0006] The purpose of this application is to provide a method, equipment, medium, and product for determining the total volume of interception pools based on urban initial stormwater interception standards, which can reduce non-point source pollution loads and improve the operating efficiency and management level of interception facilities.

[0007] To achieve the above objectives, this application provides the following solution:

[0008] Firstly, this application provides a method for determining the total volume of an intercepting pond based on urban initial rainwater interception standards, the method comprising:

[0009] During rainfall, water quality and flow monitoring data of stormwater outfalls in the study area are acquired, and key pollutants are identified based on the water quality and flow monitoring data; the water quality and flow monitoring data include: rainfall amount, pollutant concentration and discharge flow data of a single rainfall event;

[0010] A stormwater and flood management model for the study area was established, and based on the model, a cumulative rainfall-cumulative runoff relationship diagram was constructed. The stormwater and flood management model was used to simulate the cumulative runoff in the study area under different rainfall conditions.

[0011] Based on water quality and flow monitoring data, and using the cumulative rainfall-cumulative runoff relationship diagram, a cumulative pollutant flushing volume-cumulative rainfall relationship diagram is constructed.

[0012] The initial loss rainfall of each rainfall event was identified based on the cumulative proportion of pollutant runoff from multiple rainfall events and the cumulative rainfall. The net intercepted rainfall was then determined based on the cumulative rainfall and the initial loss rainfall. Subsequently, a net intercepted rainfall-interception ratio-rainfall relationship diagram was constructed for the study area based on the net intercepted rainfall.

[0013] Based on the pollutant flux and water quality of each rainfall event, key rainfall intervals are determined;

[0014] The initial rainwater interception standard is determined based on the relationship diagram of net intercepted rainfall, interception ratio, and rainfall amount, and the key rainfall intervals.

[0015] The total volume of the interception pool is determined based on the initial rainwater interception standard.

[0016] Optionally, the step of acquiring water quality and flow monitoring data of rainwater outfalls in the study area during rainfall, and identifying key pollutants based on the water quality and flow monitoring data, specifically includes:

[0017] Based on water quality and flow monitoring data, the Nemerow index method was used to determine the runoff water pollution status in the study area;

[0018] Key pollutants were identified based on the runoff water pollution status of the study area.

[0019] Optionally, the step of establishing a rainstorm and flood management model for the study area, and constructing a cumulative rainfall-cumulative runoff relationship diagram based on the rainstorm and flood management model, specifically includes:

[0020] Based on the cumulative rainfall-cumulative runoff relationship diagram, using the formula Determine the runoff coefficient k for the study area;

[0021] Where k0 is the slope of the cumulative rainfall-cumulative runoff relationship diagram, and S is the catchment area of ​​the study area.

[0022] Optionally, based on the pollutant flux and water quality of each rainfall event, key rainfall intervals can be determined, specifically including:

[0023] Using formula Determine the pollutant runoff W per unit area for each rainfall event;

[0024] Based on the pollutant runoff per unit area W of each rainfall event, construct a graph showing the relationship between pollutant runoff per unit area and rainfall.

[0025] Using formula Determine the average concentration of pollutants in each rainfall event. ;

[0026] Based on the average concentration of pollutants in each rainfall event Construct a graph showing the relationship between average pollutant concentration and rainfall.

[0027] Based on the pollutant runoff-rainfall relationship diagram and the pollutant average concentration-rainfall relationship diagram, key rainfall intervals were identified.

[0028] Among them, C t Let Q be the pollutant concentration at observation time t. t Let t be the rainwater discharge rate at observation time t, Δt be the interval between two observation times, S be the catchment area of ​​the study area, n be the number of observation times, and Q be the total runoff of the rainfall events.

[0029] Optionally, determining the initial rainwater interception standard based on the net interception rainfall-interception ratio-rainfall relationship diagram and key rainfall intervals specifically includes:

[0030] Using formula Determine the interception rate α for rainfall at different rainfall intensities;

[0031] Using formula Determine the annual pollutant interception rate β;

[0032] Using formula Determine the annual pollutant interception volume M;

[0033] Identify the pollutant interception ratio corresponding to key rainfall intervals based on the relationship diagram of net interception rainfall, interception ratio, and rainfall.

[0034] Using formula Determine the water quality improvement effect ΔC of the receiving water body;

[0035] Using formula Determine the rate of decrease θ of pollutant concentration in the receiving water body;

[0036] The initial rainwater interception standard is determined based on the rainfall interception rate α for different rainfall intensities, the annual pollutant interception rate β, the annual pollutant interception volume M, the pollutant interception ratio in key rainfall intervals, the improvement rate of water quality in the receiving water body ΔC, and the pollutant concentration reduction rate θ in the receiving water body.

[0037] Among them, P net For net intercepted rainfall, P il P represents the initial rainfall loss. sl Let P be the maximum limit of a certain rainfall intensity standard. net With P il The sum is greater than P sl Then α is 1, N is the total number of rainfall events throughout the year, and β i Let P be the pollutant interception rate of the i-th rainfall event. i Let P be the rainfall amount of the i-th rainfall event, P be the total annual rainfall, k be the runoff coefficient, and C be the total annual rainfall amount. i Let S be the average pollutant concentration of the i-th rainfall event, S be the catchment area of ​​the study area, C0 be the concentration of the receiving water body before rainfall, and Q0 be the flow rate of the receiving water body before rainfall.

[0038] Optionally, determining the total volume of the interception pool based on the initial rainwater interception standard specifically includes:

[0039] Using formula Determine the total volume V of the interception pool;

[0040] Where k is the runoff coefficient, P net is the initial rainwater interception standard, and is the net intercepted rainfall; S is the catchment area of ​​the study area.

[0041] Secondly, this application provides a device for determining the total volume of an intercepting pond based on urban initial rainwater interception standards, the device comprising:

[0042] The key pollutant identification module is used to acquire water quality and flow monitoring data of rainwater outfalls in the study area during rainfall, and to identify key pollutants based on the water quality and flow monitoring data; the water quality and flow monitoring data includes: rainfall amount, pollutant concentration and discharge flow data of a single rainfall event;

[0043] The cumulative rainfall-cumulative runoff relationship graph construction module is used to establish a rainstorm and flood management model for the study area, and to construct a cumulative rainfall-cumulative runoff relationship graph based on the rainstorm and flood management model; the rainstorm and flood management model is used to simulate the cumulative runoff in the study area under different rainfall conditions;

[0044] The module for constructing the relationship graph of cumulative pollutant flushing volume as a percentage of cumulative rainfall is used to construct the relationship graph of cumulative pollutant flushing volume as a percentage of cumulative rainfall based on water quality and flow monitoring data and the cumulative rainfall-cumulative runoff relationship graph.

[0045] The module for constructing the net intercepted rainfall-interception ratio-rainfall relationship diagram is used to identify the initial loss rainfall of each rainfall event based on the cumulative proportion of pollutant flushing amount-cumulative rainfall relationship diagram of multiple rainfall events, and to determine the net intercepted rainfall based on the cumulative rainfall and initial loss rainfall; then, based on the net intercepted rainfall, a net intercepted rainfall-interception ratio-rainfall relationship diagram of the study area is constructed.

[0046] The critical rainfall interval determination module is used to determine the critical rainfall interval based on the pollutant flux and water quality of each rainfall event.

[0047] The initial rainwater interception standard determination module is used to determine the initial rainwater interception standard based on the relationship diagram of net intercepted rainfall - interception ratio - rainfall and key rainfall intervals;

[0048] The interception pool total volume determination module is used to determine the total volume of the interception pool based on the initial rainwater interception standard.

[0049] Thirdly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for determining the total volume of the interception pool based on the urban initial rainwater interception standard.

[0050] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the total volume of the interception pool based on urban initial rainwater interception standards.

[0051] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the method for determining the total volume of the interception pool based on urban initial rainwater interception standards.

[0052] According to the specific embodiments provided in this application, this application has the following technical effects:

[0053] This application provides a method, equipment, medium, and product for determining the total volume of interception ponds based on urban initial stormwater interception standards. In this application, the interception standard is defined as the rainfall amount minus initial loss, i.e., net intercepted rainfall. The total regional runoff is calculated by combining the runoff coefficient; the net interception volume classification is determined through a relationship diagram of net intercepted rainfall, interception ratio, and rainfall amount; and the rainfall interception rate, pollutant interception rate in key rainfall intervals, annual pollutant interception effect, and water quality improvement effect on receiving water bodies are calculated under different net intercepted rainfall amounts. The application comprehensively considers the impact of interception on the rainfall discharge process and the receiving water bodies, and is suitable for comprehensive decision support under different benefit, cost, and management scenarios. The water quality and quantity process of rainfall discharge in the study area is accurately characterized by calibration using a Storm Water Management Model (SWMM). The technical route is clear, the calculation formula is explicit, and it can accurately calculate the interception requirements of different areas. In particular, the plotting of the "Net Intercepted Rainfall - Interception Ratio - Rainfall Relationship Diagram" establishes the relationship between net intercepted rainfall, interception ratio, and rainfall amount, reflecting specific regional characteristics. The method for determining the initial stormwater interception standard proposed in this application solves the problem of the lack of a unified scientific methodology, reflects regional differences and dynamism, optimizes urban drainage systems, reduces non-point source pollution loads, and improves the operational efficiency and management level of interception facilities, thus providing strong support for the sustainable development of urban water environment. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic flowchart of a method for determining the total volume of an interception pool based on urban initial rainwater interception standards in one embodiment of this application;

[0056] Figure 2 This is a schematic diagram illustrating the relationship between cumulative rainfall and cumulative runoff.

[0057] Figure 3 This is a schematic diagram of the cumulative scour curve;

[0058] Figure 4 A schematic diagram illustrating the process of drawing a graph showing the relationship between the cumulative percentage of pollutant runoff and cumulative rainfall.

[0059] Figure 5 This is a schematic diagram showing the relationship between net intercepted rainfall, interception ratio, and rainfall.

[0060] Figure 6This is a graph showing the changes in rainfall, runoff, and pollutant concentrations for several rainfall events in Area A.

[0061] Figure 7 A simplified diagram of the catchment area division and pipeline network model for Area A;

[0062] Figure 8 This is a curve showing the cumulative rainfall versus cumulative runoff in area A.

[0063] Figure 9 A graph showing the relationship between the cumulative percentage of pollutant runoff in Area A and the cumulative rainfall.

[0064] Figure 10 A graph showing the relationship between net intercepted rainfall, interception ratio, and rainfall in Area A;

[0065] Figure 11 A graph showing the relationship between pollutant runoff per unit area and rainfall in the central urban area's residential and commercial districts;

[0066] Figure 12 A graph showing the relationship between average pollutant concentrations and rainfall in the central urban area's residential and commercial zones;

[0067] Figure 13 A schematic diagram showing the annual pollutant interception volume corresponding to different net interception rainfall amounts;

[0068] Figure 14 This diagram illustrates the rate of decrease in pollutant concentration in water bodies under different interception volumes. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0070] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0071] In one exemplary embodiment, such as Figure 1 As shown, a method for determining the total volume of an interception basin based on urban initial stormwater interception standards is provided. This method includes the following steps S101 to S107: Wherein:

[0072] S101, during the rainfall process, acquire water quality and flow monitoring data of rainwater outfalls in the study area, and identify key pollutants based on the water quality and flow monitoring data; the water quality and flow monitoring data includes: rainfall amount, pollutant concentration and discharge flow data of a single rainfall event;

[0073] The study area is selected from representative regions. The study area must have an independent urban surface runoff catchment area, and the underlying surface type must be representative, covering land uses such as commercial, residential, and transportation. Complete data on pipe networks and manholes is required to facilitate pipe network model construction. Regional runoff and stormwater are discharged through centralized stormwater outfalls. These outfalls should not be too small, and their actual height should ideally be higher than the surface of the receiving river to meet the conditions for manual sampling and flow monitoring. This application, based on the selection of representative regions, has a methodology that can be replicated to any urban area with different underlying surface characteristics, demonstrating strong scalability.

[0074] During rainfall monitoring, rain gauges were deployed on-site in the study area to measure rainfall at 5-15 minute intervals, recording rainfall changes as data for each rainfall event. For each rainfall event, samples were taken at least 10 times (5-15 minute intervals) according to the flow rate fluctuation curve, covering various rainfall types including light, moderate, heavy, and torrential rain. Water sample monitoring parameters included pH, suspended solids, chemical oxygen demand (COD), permanganate index, total nitrogen, ammonia nitrogen, and total phosphorus. Flow rate at stormwater outfalls was measured and calculated using flow meters and water level gauges.

[0075] S101 specifically includes:

[0076] S11. Based on water quality and flow monitoring data, the Nemerow index method was used to determine the runoff water pollution status in the study area. The calculation formula is as follows:

[0077] ;

[0078] ;

[0079] ;

[0080] Among them, P N The Nemerow Comprehensive Pollution Index; i S represents the measured value of the i-th pollutant; i For the first i Standard values ​​for various pollutants; F i For the first i Pollution index of various pollutants; For F i The average value of F; i,max For F i The maximum value.

[0081] S12, Identify key pollutants based on the runoff water pollution status of the study area.

[0082] Taking into account the "Surface Water Environmental Quality Standard (GB3838-2002)" and the "Urban Wastewater Treatment Plant Pollutant Discharge Standard (GB18918-2002)", and referring to the requirements for urban non-point source pollution control in the "Performance Evaluation and Assessment Indicators for Sponge City Construction (Trial)", such as that the water quality of rivers and lakes within the sponge city construction area should not be lower than Class IV of the "Surface Water Environmental Quality Standard (GB3838-2002)", the water pollution type classification level is determined and shown in Table 1.

[0083] Table 1. Nemerow Index Pollution Level Classification (Concentration Unit: mg·L) -1 )

[0084]

[0085] S102, establish a rainstorm and flood management model for the study area, and based on the rainstorm and flood management model, construct a cumulative rainfall-cumulative runoff relationship diagram, and as shown... Figure 2 As shown; the storm flood management model is used to simulate the cumulative runoff in the study area under different rainfall conditions;

[0086] The stormwater and flood management model calculates rainfall runoff and pollutants within pipelines, and includes sub-catchment area delineation, pipeline network generalization, calculation module construction, parameter extraction and calibration, etc.

[0087] Different regions have varying underlying surface conditions and pipeline layouts. By inputting different rainfall amounts into a calibrated, accurate stormwater flood management model, the corresponding cumulative runoff can be calculated, and a cumulative rainfall-cumulative runoff relationship diagram can be plotted. This diagram allows for the rapid identification of the cumulative rainfall corresponding to the cumulative runoff at different times during a rainfall event.

[0088] When the trend line of the cumulative rainfall-cumulative runoff relationship graph tends to be linear, the slope of this linear relationship curve is used as the basis for calculating the runoff coefficient of the region; that is, using the formula... Determine the runoff coefficient k for the study area;

[0089] Where k0 is the slope of the cumulative rainfall-cumulative runoff relationship diagram, and S is the catchment area of ​​the study area.

[0090] S103. Based on water quality and flow monitoring data, and using the cumulative rainfall-cumulative runoff relationship diagram, construct the cumulative pollutant flushing volume-cumulative rainfall relationship diagram;

[0091] Based on the water quality and quantity processes at stormwater outfalls corresponding to each rainfall event in each region, a cumulative scour curve for each rainfall event is constructed, such as... Figure 3As shown, this is the relationship between the cumulative percentage of pollutant runoff and the cumulative percentage of runoff. Then, by multiplying the cumulative runoff percentage by the total runoff of the rainfall event, we obtain the relationship between the cumulative percentage of pollutant runoff and the cumulative runoff. Next, using the cumulative rainfall-cumulative runoff relationship diagram, we convert the cumulative runoff in the pollutant runoff cumulative percentage-cumulative runoff relationship diagram into cumulative rainfall, and plot the relationship between the cumulative percentage of pollutant runoff and the cumulative rainfall for this rainfall event, as shown. Figure 4 As shown in the figure, the cumulative rainfall corresponding to different pollutant control ratios can be identified.

[0092] S104. Based on the relationship between the cumulative proportion of pollutant runoff and the cumulative rainfall from multiple rainfall events, the initial loss rainfall of each rainfall event is identified, and the net interception rainfall is determined based on the cumulative rainfall and the initial loss rainfall. Then, based on the net interception rainfall, a relationship diagram between net interception rainfall, interception ratio, and rainfall in the study area is constructed.

[0093] Specifically, by combining the cumulative percentage of pollutant runoff from multiple rainfall events with the cumulative rainfall, the initial loss value of rainfall runoff in the region is identified. The net intercepted rainfall is obtained by subtracting the initial loss rainfall from the cumulative rainfall corresponding to a specific pollutant control ratio. Since there is currently no precise definition of intercepted rainfall, it is defined as the rainfall minus the initial loss, i.e., the net intercepted rainfall.

[0094] according to Figure 4 The graph shown represents the relationship between the cumulative percentage of pollutant runoff and the cumulative rainfall for a given rainfall event. It identifies the net intercepted rainfall (cumulative rainfall minus initial loss) corresponding to different pollutant control ratio targets (cumulative percentage of pollutant runoff). Net intercepted rainfall corresponding to different pollutant control ratios was also recorded for different rainfall events.

[0095] By plotting the net intercepted rainfall corresponding to different pollutant control ratios for different rainfall events in a certain area onto a single graph, a relationship graph of net intercepted rainfall - interception ratio - rainfall is obtained, as shown below. Figure 5 As shown in the diagram, the net interception rainfall-interception ratio-rainfall amount relationship chart can intuitively display the net interception rainfall required for different pollutant interception ratios under a given rainfall amount. This curve becomes more refined as the number of rainfall events observed in a given area increases. The net interception rainfall-interception ratio-rainfall amount relationship chart serves as the basis for determining the interception volume.

[0096] S105, based on the pollutant flux and water quality of each rainfall event, determines the key rainfall intervals;

[0097] S105 specifically includes:

[0098] S51, using formula Determine the pollutant runoff W per unit area for each rainfall event;

[0099] S52, construct a pollutant runoff per unit area W based on the pollutant runoff per unit area and the rainfall amount;

[0100] S53, using the formula Determine the average concentration of pollutants in each rainfall event. ;

[0101] S54, based on the average pollutant concentration of each rainfall event. Construct a graph showing the relationship between average pollutant concentration and rainfall.

[0102] Among them, C t Let Q be the pollutant concentration at observation time t. t Let t be the rainwater discharge rate at observation time t, Δt be the interval between two observation times, S be the catchment area of ​​the study area, n be the number of observation times, and Q be the total runoff of the rainfall events.

[0103] S55, based on the pollutant runoff-rainfall relationship diagram per unit area and the pollutant average concentration-rainfall relationship diagram, the key rainfall intervals are determined;

[0104] As a specific implementation, the rainfall intervals where data points deviate significantly from normal patterns are identified based on the pollutant runoff-rainfall relationship diagram per unit area. The rainfall intervals where average pollutant concentration data points exceed normal pollutant concentrations are identified based on the average pollutant concentration-rainfall relationship diagram. Based on these two identified rainfall intervals, the key control rainfall intervals, i.e., critical rainfall intervals, are then identified.

[0105] S106. Determine the initial rainwater interception standard based on the relationship diagram of net interception rainfall-interception ratio-rainfall and key rainfall intervals; that is, determine the net interception volume classification based on the curvature change in the relationship diagram of net interception rainfall-interception ratio-rainfall and actual conditions, and calculate the rainfall interception rate, pollutant interception rate, pollutant interception rate in key rainfall intervals, and water quality improvement effect of receiving water bodies under different net interception volumes.

[0106] S106 specifically includes:

[0107] S61, using formula Determine the rainfall interception rate α for different rainfall intensities; classify rainfall intensities into five categories according to the rainfall intensity classification standard: light rain, moderate rain, heavy rain, rainstorm, and torrential rain; calculate the number of events, the percentage of events, the cumulative rainfall, and the percentage of rainfall for each type of rainfall intensity; and identify the key rainfall intensity types to be controlled based on the percentage of events and the percentage of rainfall.

[0108] S62, using formula Determine the annual pollutant interception rate β; that is, based on the relationship diagram of net interception rainfall - interception ratio - rainfall, identify the pollutant interception ratio for all rainfall events throughout the year under the given net interception rainfall. Weight the pollutant interception ratios of all events to obtain the annual pollutant interception rate.

[0109] S63, using the formula Determine the annual pollutant interception volume M;

[0110] S64. Identify the pollutant interception ratio corresponding to key rainfall intervals based on the relationship diagram of net interception rainfall - interception ratio - rainfall.

[0111] S65, using formula Determine the water quality improvement effect ΔC of the receiving water body;

[0112] S66, using formula Determine the rate of decrease θ of pollutant concentration in the receiving water body;

[0113] S67. The initial rainwater interception standard is determined based on the rainfall interception rate α for different rainfall intensities, the annual pollutant interception rate β, the annual pollutant interception volume M, the pollutant interception ratio in key rainfall intervals, the improvement range of water quality in the receiving water body ΔC, and the pollutant concentration reduction rate θ in the receiving water body.

[0114] Among them, P net For net intercepted rainfall, P il P represents the initial rainfall loss. sl Let P be the maximum limit of a certain rainfall intensity standard. net With P il The sum is greater than P sl Then α is 1, N is the total number of rainfall events throughout the year, and β i Let P be the pollutant interception rate of the i-th rainfall event. i Let P be the rainfall amount of the i-th rainfall event, P be the total annual rainfall, k be the runoff coefficient, and C be the total annual rainfall amount. i Let S be the average pollutant concentration of the i-th rainfall event, S be the catchment area of ​​the study area, C0 be the concentration of the receiving water body before rainfall, and Q0 be the flow rate of the receiving water body before rainfall.

[0115] Specifically, the above data on rainfall interception rates under different net interception rainfall amounts, pollutant interception rates in key rainfall areas, annual pollutant interception effects (pollutant interception rate, pollutant interception volume), and water quality improvement effects on receiving water bodies (water quality improvement magnitude, pollutant concentration reduction rate) provide data support for comprehensive consideration of benefits, costs, and management. Based on this, a suitable net interception rainfall amount P can be comprehensively selected. net As a standard for initial rainwater interception.

[0116] S107, determine the total volume of the interception pool according to the initial rainwater interception standard.

[0117] S107 specifically includes:

[0118] Using formula Determine the total volume V of the interception pool;

[0119] Where k is the runoff coefficient, P net is the initial rainwater interception standard, and is the net intercepted rainfall; S is the catchment area of ​​the study area.

[0120] The method provided in this application is illustrated below through specific embodiments, including:

[0121] This case study focuses on a residential and commercial area in the city center, characterized by high population density and a large proportion of mixed residential and commercial areas. Four representative residential and commercial areas (A, B, C, and D) were selected for the study.

[0122] Rainfall measurement. Rain gauges were deployed in the study area to measure rainfall at 5-15 minute intervals, recording rainfall variations during the rainfall process. This data was used as single-event rainfall data for model calculations. A total of 34 on-site rainfall monitoring and sampling events were completed in this case study, including 4 light rain events, 15 moderate rain events, 10 heavy rain events, and 5 rainstorm events.

[0123] Table 2. Rainfall statistics at each monitoring point

[0124]

[0125] Rainwater outfall water quality sampling and analysis. For each rainfall event, sampling was conducted at least 10 times (5-15 minutes apart) according to the flow rate fluctuation curve, covering various rainfall types including light, moderate, heavy, and torrential rain. Water sample monitoring parameters included pH, suspended solids, chemical oxygen demand (COD), permanganate index, total nitrogen, ammonia nitrogen, and total phosphorus. Taking Area A as an example, a total of 9 on-site sampling and water quality analysis sessions were conducted.

[0126] Rainwater outfall flow rate measurement. The process of measuring and calculating the rainwater outfall flow rate using flow meters and water level gauges. Figure 6 This is a graph showing the changes in rainfall, runoff, and pollutant concentrations during several rainfall events in Area A.

[0127] The Nemerow index method was used to comprehensively evaluate the pollution status of runoff water at different locations. The calculation formula is as follows:

[0128] ;

[0129] ;

[0130] ;

[0131] In the formula, P NThe Nemerow Comprehensive Pollution Index; ρ i S represents the measured value of the i-th pollutant; i For the first i Standard values ​​for various pollutants; F i For the first i Pollution index of each pollutant; F̅ is F i The average value of F; i,max For F i The maximum value.

[0132] Since there are currently no domestic standards for evaluating the quality of rainwater and runoff, this study comprehensively considers the "Surface Water Environmental Quality Standard (GB3838-2002)" and the "Urban Wastewater Treatment Plant Pollutant Discharge Standard (GB18918-2002)," and refers to the requirements for urban non-point source pollution control in the "Performance Evaluation and Assessment Indicators for Sponge City Construction (Trial Implementation)" that the water quality of rivers and lakes within the sponge city construction area should not be lower than Class IV of the "Surface Water Environmental Quality Standard (GB 3838-2002)," etc., to determine the classification level of water pollution types.

[0133] As shown in Table 3, the water quality assessment results for points A, B, C, and D were all severely or relatively severely polluted. As urban built-up areas primarily consisting of residential areas, the high density of buildings and the origin of roof deposits mainly stem from atmospheric dry and wet deposition, substances released from the aging and wear of roofing materials, as well as fallen leaves and bird droppings, resulting in significant organic pollution. Road surfaces and plazas are major areas of human activity, with vehicle and pedestrian traffic leading to more dispersed pollutants and higher particulate matter content, thus contributing to higher COD levels. Cr TS and TS are the two types of pollutants with the greatest impact.

[0134] Table 3 Merlot values ​​and water quality assessment results at each location

[0135]

[0136] A Southwest Swimming Model (SWMM) was established in the study area to calculate rainfall runoff and contaminants within pipelines. This included sub-catchment delineation, pipeline network generalization, calculation module construction, parameter extraction, and calibration. Figure 7 As shown, taking Area A as an example, a total of 261 catchment areas were divided, with 91 pipe segment nodes and a pipe segment length of 1136.64 meters. The hydrological simulation error of 9 rainfall events ranged from 3.5% to 20.0%.

[0137] By simulating and plotting the cumulative rainfall-cumulative runoff relationship, and considering the differences in underlying surface conditions and pipeline layout across different regions, the cumulative runoff was calculated using an accurately calibrated SWMM model with varying rainfall amounts, and the cumulative rainfall-cumulative runoff relationship was plotted. This plot allows for the rapid identification of the cumulative rainfall corresponding to the cumulative runoff at different times during a rainfall event. Taking area A as an example, the relationship between cumulative rainfall and cumulative runoff in area A exhibits an inverted arc shape. That is, in the initial stage of runoff formation, the required rainfall-runoff increases exponentially, while in the middle and later stages of runoff formation, the relationship between rainfall and runoff is almost linear.

[0138] When the trend line of the cumulative rainfall-cumulative runoff relationship graph tends to be linear, the slope of this linear relationship curve is used as the basis for calculating the runoff coefficient of that area. For example... Figure 8 As shown, the slope of the linear relationship curve is 0.043 × 10⁻⁶. -3 / m 2 The runoff coefficient for this area was calculated to be 0.55.

[0139] Based on the water quality and quantity processes at stormwater outfalls corresponding to each rainfall event in each region, a cumulative scour curve for each rainfall event is plotted, i.e., a graph showing the cumulative percentage of pollutant scour as a percentage of cumulative runoff. Then, the cumulative runoff percentage is multiplied by the total runoff of that rainfall event to obtain a graph showing the cumulative percentage of pollutant scour as a percentage of cumulative runoff. Finally, using the cumulative rainfall-cumulative runoff graph, the cumulative runoff in the pollutant scour as a percentage of cumulative runoff is converted into cumulative rainfall, and a graph showing the cumulative percentage of pollutant scour as a percentage of cumulative rainfall for that rainfall event is plotted. This allows identification of the amount of rainfall required to intercept different pollutant control ratios.

[0140] like Figure 9 As shown in the diagram, the initial runoff loss value of the region is identified by combining the cumulative percentage of pollutant runoff from multiple rainfall events with the cumulative rainfall. The initial runoff loss in area A is approximately 3 mm. Subtracting the initial runoff loss from the cumulative rainfall yields the net intercepted rainfall. Since there is currently no precise definition of intercepted rainfall, it is defined as the rainfall minus the initial runoff loss, i.e., the net intercepted rainfall.

[0141] By analyzing the relationship between the cumulative percentage of pollutant runoff and the cumulative rainfall for a given rainfall event, the net intercepted rainfall (cumulative rainfall minus initial loss) corresponding to different pollutant control ratio targets (cumulative percentage of pollutant runoff) is identified. Table 4 shows the net intercepted rainfall corresponding to different pollutant control ratios for different rainfall events.

[0142] Table 4. Net interception rainfall corresponding to pollutant interception targets under different rainfall amounts.

[0143]

[0144] As shown in Table 4, the net intercepted rainfall corresponding to different pollutant control ratios for different rainfall events in this area is plotted on a single graph, resulting in a graph showing the relationship between net intercepted rainfall, interception ratio, and rainfall. Figure 10 As shown in the figure, based on the relationship between net intercepted rainfall, interception ratio, and rainfall, the net intercepted rainfall required for different pollutant interception ratios under a given rainfall amount can be intuitively read. This figure reveals the differentiated characteristics of each region.

[0145] like Figure 11 and Figure 12 As shown, identify the rainfall intervals in the "Pollutant Runoff-Rainfall Relationship Chart" and the "Pollutant Average Concentration-Rainfall Relationship Chart" where the average pollutant concentration data points exceed the normal pollutant concentration. This helps identify key rainfall intervals.

[0146] In this case study, the central urban commercial and residential area showed a positive correlation between pollutant runoff per unit area and rainfall. Specifically, COD levels were highest in the 10-20mm and 30-35mm rainfall ranges. cr TP runoff showed relatively high values. The average concentration of pollutants in rainfall runoff was high in events with rainfall less than 20 mm. Therefore, rainfall events of less than 20 mm generally require close monitoring.

[0147] As shown in Table 5, taking study area A as an example, a net intercepted rainfall of 3 mm results in an interception rate of 60% for light rain, 24% for moderate rain, 12% for heavy rain, 6% for torrential rain, and 2% for extremely heavy rain; a net intercepted rainfall of 7 mm results in an interception rate of 100% for light rain, 40% for moderate rain, 20% for heavy rain, 10% for torrential rain, and 4% for extremely heavy rain; a net intercepted rainfall of 9 mm results in an interception rate of 100% for light rain, 48% for moderate rain, 24% for heavy rain, 12% for torrential rain, and 5% for extremely heavy rain; a net intercepted rainfall of 15 mm results in an interception rate of 100% for light rain, 72% for moderate rain, 36% for heavy rain, 18% for torrential rain, and 7% for extremely heavy rain. Light and moderate rain are the key areas of focus.

[0148] Table 5. Rainfall interception rates corresponding to different net intercepted rainfall amounts under different rainfall intensities in Area A.

[0149]

[0150] Table 6 shows the annual pollutant interception flow rate in Area A. The average interception rate is 16% for a flow rate of 3 mm; 34% for a flow rate of 7 mm; 42% for a flow rate of 9 mm; and 61% for a flow rate of 15 mm.

[0151] Table 6. Annual Pollutant Interception Rates Corresponding to Different Net Interception Rainfall Amounts in Area A

[0152]

[0153] Annual pollutant interception volume as follows Figure 13 As shown, with the increase of net intercepted rainfall, the growth rate of pollutant interception volume slows down significantly after 10 mm.

[0154] For critical rainfall ranges of <20mm, with 20mm as the maximum control rainfall, when 20% of pollutants are intercepted, the net intercepted rainfall for different pollutants is between 2.7-3.8mm; when 30% of pollutants are intercepted, the net intercepted rainfall is approximately 4.6-5.5mm; when 40% of pollutants are intercepted, the net intercepted rainfall is between 6.1-7.2mm; when 50% of pollutants are intercepted, the net intercepted rainfall is between 7.8-9mm; and when 60% of pollutants are intercepted, the net intercepted rainfall is between 9.3-11mm.

[0155] The improvement of water quality in the receiving water body under different interception flows is shown in Table 7 and Figure 14 As shown, with the increase of interception volume, the rate of improvement in water quality and the rate of decrease in pollutant concentration in the receiving water body gradually decrease.

[0156] Table 7. Improvement in pollutant concentration in receiving water bodies under different interception volumes.

[0157]

[0158] As shown in Table 8, the calculation results of rainfall interception rate, pollutant interception rate in key rainfall areas, annual pollutant interception effect, and water quality improvement effect of receiving water bodies under different net interception rainfall amounts provide data support for comprehensive consideration of benefits, costs, and management. Based on this, a suitable net interception rainfall amount can be comprehensively selected as the initial rainwater interception standard.

[0159] Based on water quality and runoff analysis, rainfall of less than 20 mm requires close monitoring. Analysis of the annual rainfall pattern indicates a focus on controlling light and moderate rain. Analysis of the relationship between annual pollutant interception volume and net intercepted rainfall shows that as the interception volume increases, the rate of increase in pollutant interception volume and the extent and proportion of water quality improvement gradually slows down. With a net interception volume of 5-7 mm, over 90% interception is achieved for light rain; the pollutant interception proportion for rainfall under 20 mm is over 30%-40%; the annual pollutant interception rate is between 26%-34%, with an average water quality improvement rate of 3.2%. With a net interception volume of 7-9 mm, all light rain is intercepted, and over 44% is intercepted for moderate rain; the pollutant interception proportion for rainfall under 20 mm is over 40%-50%; the annual pollutant interception rate is between 34%-42%, with an average water quality improvement rate of 4.1%. A net interception flow of 9-10 mm achieves complete interception of light rain and over 50% interception of moderate rain; the pollutant interception rate for rainfall under 20 mm is over 60%; the annual pollutant interception rate is between 42% and 45%, with an average water quality improvement rate of 4.6%. A net interception flow of 15 mm achieves complete interception of light rain and over 72% interception of moderate rain; the pollutant interception rate for rainfall under 20 mm is over 90%; the annual pollutant interception rate is over 60%, with an average water quality improvement rate of 6.4%. Considering the overall water quality effect, an interception standard of 8 mm is recommended.

[0160] Table 8. Improvement in pollutant concentration in water bodies under different interception volumes.

[0161]

[0162] Based on this embodiment, the runoff coefficient of area A is 0.55, and the interception standard is 8mm. The total volume of the interception pond required for the area is calculated to be 1584m³. 3 .

[0163] Based on the same inventive concept, this application also provides a device for determining the total volume of an intercepting pool based on the urban initial rainwater interception standard, used to implement the above-mentioned method for determining the total volume of an intercepting pool based on the urban initial rainwater interception standard. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the device for determining the total volume of an intercepting pool based on the urban initial rainwater interception standard provided below can be found in the limitations of the method for determining the total volume of an intercepting pool based on the urban initial rainwater interception standard described above, and will not be repeated here.

[0164] In one exemplary embodiment, a device for determining the total volume of an interception pool based on urban initial stormwater interception standards is provided, comprising:

[0165] The key pollutant identification module is used to acquire water quality and flow monitoring data of rainwater outfalls in the study area during rainfall, and to identify key pollutants based on the water quality and flow monitoring data; the water quality and flow monitoring data includes: rainfall amount, pollutant concentration and discharge flow data of a single rainfall event;

[0166] The cumulative rainfall-cumulative runoff relationship graph construction module is used to establish a rainstorm and flood management model for the study area, and to construct a cumulative rainfall-cumulative runoff relationship graph based on the rainstorm and flood management model; the rainstorm and flood management model is used to simulate the cumulative runoff in the study area under different rainfall conditions;

[0167] The module for constructing the relationship graph of cumulative pollutant flushing volume as a percentage of cumulative rainfall is used to construct the relationship graph of cumulative pollutant flushing volume as a percentage of cumulative rainfall based on water quality and flow monitoring data and the cumulative rainfall-cumulative runoff relationship graph.

[0168] The module for constructing the net intercepted rainfall-interception ratio-rainfall relationship diagram is used to identify the initial loss rainfall of each rainfall event based on the cumulative proportion of pollutant flushing amount-cumulative rainfall relationship diagram of multiple rainfall events, and to determine the net intercepted rainfall based on the cumulative rainfall and initial loss rainfall; then, based on the net intercepted rainfall, a net intercepted rainfall-interception ratio-rainfall relationship diagram of the study area is constructed.

[0169] The critical rainfall interval determination module is used to determine the critical rainfall interval based on the pollutant flux and water quality of each rainfall event.

[0170] The initial rainwater interception standard determination module is used to determine the initial rainwater interception standard based on the relationship diagram of net intercepted rainfall - interception ratio - rainfall and key rainfall intervals;

[0171] The interception pool total volume determination module is used to determine the total volume of the interception pool based on the initial rainwater interception standard.

[0172] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal. The computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is connected to the system bus via the I / O interfaces. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The I / O interfaces of the computer device are used for exchanging information between the processor and external devices. The communication interface of the computer device is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for determining the total volume of an interception pool based on urban initial stormwater interception standards.

[0173] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0174] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0175] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0176] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0177] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0178] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0179] In this application, all actions to acquire signals, information, or data are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with the authorization granted by the owner of the relevant device.

[0180] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0181] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for determining the total volume of an interception basin based on urban initial stormwater interception standards, characterized in that, The method for determining the total volume of the interception pool based on urban initial rainwater interception standards includes: During rainfall, water quality and flow monitoring data of stormwater outfalls in the study area are acquired, and key pollutants are identified based on the water quality and flow monitoring data; the water quality and flow monitoring data include: rainfall amount, pollutant concentration and discharge flow data of a single rainfall event; A stormwater and flood management model for the study area was established, and based on the model, a cumulative rainfall-cumulative runoff relationship diagram was constructed. The stormwater and flood management model was used to simulate the cumulative runoff in the study area under different rainfall conditions. Based on water quality and flow monitoring data, and using the cumulative rainfall-cumulative runoff relationship diagram, a cumulative pollutant flushing volume-cumulative rainfall relationship diagram is constructed. The initial loss rainfall of each rainfall event was identified based on the cumulative proportion of pollutant runoff from multiple rainfall events and the cumulative rainfall. The net intercepted rainfall was then determined based on the cumulative rainfall and the initial loss rainfall. Subsequently, a net intercepted rainfall-interception ratio-rainfall relationship diagram was constructed for the study area based on the net intercepted rainfall. Based on the pollutant flux and water quality of each rainfall event, key rainfall intervals are determined; The initial rainwater interception standard is determined based on the relationship diagram of net intercepted rainfall, interception ratio, and rainfall amount, and the key rainfall intervals. The total volume of the interception pool is determined based on the initial rainwater interception standard. The determination of initial rainwater interception standards based on the relationship diagram of net intercepted rainfall - interception ratio - rainfall and key rainfall intervals specifically includes: Using formula Determine the interception rate α for rainfall at different rainfall intensities; Using formula Determine the annual pollutant interception rate β; Using formula Determine the annual pollutant interception volume M; Identify the pollutant interception ratio corresponding to key rainfall intervals based on the relationship diagram of net interception rainfall, interception ratio, and rainfall. Using formula Determine the extent of water quality improvement ΔC in the receiving water body; Using formula Determine the rate of decrease θ of pollutant concentration in the receiving water body; The initial rainwater interception standard is determined based on the rainfall interception rate α for different rainfall intensities, the annual pollutant interception rate β, the annual pollutant interception volume M, the pollutant interception ratio in key rainfall intervals, the improvement rate of water quality in the receiving water body ΔC, and the pollutant concentration reduction rate θ in the receiving water body. Among them, P net For net intercepted rainfall, P il P represents the initial rainfall loss. sl Let P be the maximum limit of a certain rainfall intensity standard. net With P il The sum is greater than P sl Then α is 1, N is the total number of rainfall events throughout the year, and β i Let P be the pollutant interception rate of the i-th rainfall event. i Let P be the rainfall amount of the i-th rainfall event, P be the total annual rainfall, k be the runoff coefficient, and C be the total annual rainfall amount. i Let S be the average pollutant concentration of the i-th rainfall event, S be the catchment area of ​​the study area, C0 be the concentration of the receiving water body before rainfall, and Q0 be the flow rate of the receiving water body before rainfall.

2. The method for determining the total volume of interception basins based on urban initial rainwater interception standards according to claim 1, characterized in that, The process of acquiring water quality and flow monitoring data of stormwater outfalls in the study area during rainfall, and identifying key pollutants based on the water quality and flow monitoring data, specifically includes: Based on water quality and flow monitoring data, the Nemerow index method was used to determine the runoff water pollution status in the study area; Key pollutants were identified based on the runoff water pollution status of the study area.

3. The method for determining the total volume of interception ponds based on urban initial rainwater interception standards according to claim 1, characterized in that, The establishment of a rainstorm and flood management model for the study area, and the construction of a cumulative rainfall-cumulative runoff relationship diagram based on the rainstorm and flood management model, specifically includes: Based on the cumulative rainfall-cumulative runoff relationship diagram, using the formula Determine the runoff coefficient k for the study area; Where k0 is the slope of the cumulative rainfall-cumulative runoff relationship diagram, and S is the catchment area of ​​the study area.

4. The method for determining the total volume of interception ponds based on urban initial rainwater interception standards according to claim 1, characterized in that, Based on the pollutant flux and water quality of each rainfall event, key rainfall intervals were identified, including: Using formula Determine the pollutant runoff W per unit area for each rainfall event; Based on the pollutant runoff per unit area W of each rainfall event, construct a graph showing the relationship between pollutant runoff per unit area and rainfall. Using formula Determine the average concentration of pollutants in each rainfall event. ; Based on the average concentration of pollutants in each rainfall event Construct a graph showing the relationship between average pollutant concentration and rainfall. Based on the pollutant runoff-rainfall relationship diagram and the pollutant average concentration-rainfall relationship diagram, key rainfall intervals were identified. Among them, C t Let Q be the pollutant concentration at observation time t. t Let t be the rainwater discharge rate at observation time t, Δt be the interval between two observation times, S be the catchment area of ​​the study area, n be the number of observation times, and Q be the total runoff of the rainfall events.

5. The method for determining the total volume of interception ponds based on urban initial rainwater interception standards according to claim 1, characterized in that, The determination of the total volume of the interception pool based on the initial rainwater interception standard specifically includes: Using formula Determine the total volume V of the interception pool; Where k is the runoff coefficient, P net is the initial rainwater interception standard, and is the net intercepted rainfall; S is the catchment area of ​​the study area.

6. A device for determining the total volume of an intercepting pond based on urban initial rainwater interception standards, used to implement the method for determining the total volume of an intercepting pond based on urban initial rainwater interception standards as described in any one of claims 1-5, characterized in that, The equipment for determining the total volume of the interception pool based on urban initial rainwater interception standards includes: The key pollutant identification module is used to acquire water quality and flow monitoring data of rainwater outfalls in the study area during rainfall, and to identify key pollutants based on the water quality and flow monitoring data; the water quality and flow monitoring data includes: rainfall amount, pollutant concentration and discharge flow data of a single rainfall event; The cumulative rainfall-cumulative runoff relationship graph construction module is used to establish a rainstorm and flood management model for the study area, and to construct a cumulative rainfall-cumulative runoff relationship graph based on the rainstorm and flood management model; the rainstorm and flood management model is used to simulate the cumulative runoff in the study area under different rainfall conditions; The module for constructing the relationship graph of cumulative pollutant flushing volume as a percentage of cumulative rainfall is used to construct the relationship graph of cumulative pollutant flushing volume as a percentage of cumulative rainfall based on water quality and flow monitoring data and the cumulative rainfall-cumulative runoff relationship graph. The module for constructing the net intercepted rainfall-interception ratio-rainfall relationship diagram is used to identify the initial loss rainfall of each rainfall event based on the cumulative proportion of pollutant flushing amount-cumulative rainfall relationship diagram of multiple rainfall events, and to determine the net intercepted rainfall based on the cumulative rainfall and initial loss rainfall; then, based on the net intercepted rainfall, a net intercepted rainfall-interception ratio-rainfall relationship diagram of the study area is constructed. The critical rainfall interval determination module is used to determine the critical rainfall interval based on the pollutant flux and water quality of each rainfall event. The initial rainwater interception standard determination module is used to determine the initial rainwater interception standard based on the relationship diagram of net intercepted rainfall - interception ratio - rainfall and key rainfall intervals; The interception pool total volume determination module is used to determine the total volume of the interception pool based on the initial rainwater interception standard.

7. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method for determining the total volume of an interception pool based on urban initial stormwater interception standards as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the method for determining the total volume of interception pools based on urban initial rainwater interception standards, as described in any one of claims 1-5.

9. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the method for determining the total volume of interception pools based on urban initial rainwater interception standards, as described in any one of claims 1-5.

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