River pollution assessment method based on SPARROW model

Abstract

The invention relates to the technical field of the river pollution assessment, and is a river pollution assessment method based on a SPARROW model. The method comprises the following steps: step one,determining a simulation sub-drainage area of a target river according to a topology relation of a target river network; step two, acquiring the least square method estimation model parameter; step three, determining and inputting the independent variable and the dependent variable of the river pollution source based on the least square method estimation model; step four, establishing a SPARROW model of a target river simulation sub-drainage area chemical oxygen demand; step five, checking a river water quality pollution load prediction model parameter; and step six, determining the water quality type. Through the method disclosed by the invention, the pollution source components and pollution load quantitative distribution in each sub-drainage area and each control unit in the target river drainage area can be obtained, thereby obtaining the macro influence on the drainage area water pollution status by different pollution constitute features in the target drainage area; the surfacewater pollution at inland drainage area at the arid region can be effectively assessed, and the surface water source at the target river drainage area can be effectively protected and scientifically managed.

Description

technical field [0001] The invention relates to the technical field of river pollution assessment, and relates to a river pollution assessment method based on the SPARROW model. Background technique [0002] Since the development of the SPARROW model in 1997, it has been rapidly developed and widely used. It can be used in the concentration distribution of pollutants such as organic matter, nutrients, suspended solids, and pathogenic microorganisms in surface waters of large and medium-scale watersheds, upstream and downstream load transmission, attenuation, and pollution source analysis. There are applications in both simulation and forecasting. The biggest feature of the SPARROW model lies in the model structure it adopts, that is, it divides the watershed spatially and forms a detailed river reach network, and the water quality monitoring data and the GIS data of the watershed attributes are spatially corresponding to the river reach network. . In recent years, the mode...

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Problems solved by technology

[0004] The present invention provides a river pollution assessment method based on the SPARROW model, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the components and pollution of pollution sources that do not pollute surface water in inland basins in arid areas in the prior art. The quantitative distribution of load is divided and evaluated, which makes it difficult to control river pollution, and the problem of polluted rivers cannot be controlled in a targeted manner

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