Method for determining different underlying surface overland runoff pollutant parameters W contained in SWMM

Abstract

The invention discloses a method for determining different underlying surface overland runoff pollutant parameters W contained in SWMM, and belongs to the crossing fields, such as the municipal engineering and the environmental engineering. The overland runoff pollutant W is formed by the overland sediment and the natural rainfall pollutant polluted by the atmosphere. The method comprises the following steps: obtaining the different types of the underlying surface overland runoff water samples by using a sampling device, obtaining the different types of the underlying surface overland runoff water samples in the different time periods at intervals and detecting the concentration of certain pollutant, and obtaining the concentration value Wt of the runoff pollutant of the underlying surface K in the different time periods; according to the rainfall, executing the weighted average to the pollutant concentration of each time period, obtaining the average pollutant concentration value Wk of the average underlying surface K in the whole rainfall, wherein the research area contains different underlying surface types; and according to the area, executing the weighted average to the pollutant, obtaining the average concentration W of the pollutant in the whole research area, and obtaining the dimension of the parameter W value in a research area SWMM water quality model.

Description

technical field [0001] The invention relates to a method for determining parameters W of surface runoff pollutants contained in different underlying surfaces in SWMM, and belongs to the intersecting fields of municipal engineering, environmental engineering, sponge city construction and computer model software parameter determination. Background technique [0002] SWMM (Storm Water Management Model), also known as storm flood management model, is a dynamic precipitation-runoff simulation model developed by the US Environmental Protection Agency. In addition to simulating a single precipitation event or long-term water volume in a city, it can also be used for water quality simulation. . Its runoff module part comprehensively handles the precipitation, runoff and pollution loads that occur in each sub-basin. The confluence module part transmits water through pipe networks, channels, water storage and treatment facilities, water pumps, and regulating gates. The model can tra...

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Problems solved by technology

[0004] SWMM model parameters are determined by the U.S. Environmental Protection Agency based on factors such as land use types, surface pollution conditions, and environmental quality in the United States, and its use has limitations

Due to the differences in terrain and urban living environment, the limitations of its parameters make it impossible to directly simulate and use in the water quality of urban surface runoff in my country

At present, in the use of domestic SWMM water quality models, most of the parameters in foreign SWMM model manuals are copied. There is no set of parameters suitable for my country's national conditions, and there is no set of calibration methods for SWMM water quality parameters.

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