Method for determining W parameter of surface runoff pollutant in SWMM software

Abstract

The invention discloses a method for determining W parameter of surface runoff pollutant in SWMM software. The method consists of two parts. One is to simulate the erosion of surface sediment with pure water by artificial rainfall under laboratory conditions to form pollutant concentration of surface runoff W0. The other is to consider the natural rainfall water concentration W1 affected by air pollution. By combining the two parts, the determination method of pollutant parameter W of surface runoff under natural rainfall condition is realized. The method solves the problem of determining water quality parameters in SWMM software through the actual runoff data, and combines air pollutants and surface sediment pollutants into urban surface runoff pollution sources to establish a new model of water quality erosion model. Through the method, new SWMM water quality model parameters can be set up in different regions to prevent the errors to the model caused by regional problems.

Description

technical field [0001] The invention relates to a method for determining the parameter W of surface runoff pollutants in SWMM software, and belongs to the cross field 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 track and simulate the water quality and q...

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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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