Non-point source pollution calculation method based on remotely sensed image element

Abstract

The invention provides a non-point source pollution calculation method based on a remotely sensed image element. The method comprises the following steps of: 1, constructing a land utilization database and a vegetation coverage database; 2, constructing a soil type database, a soil nitrogen and phosphorus attribute database and a gradient and slope length geographic space database; 3, constructing a farmland nitrogen and phosphorus balance amount space database; 4, calculating dissolved state non-point source loads and adsorption type non-point source loads of non-point source pollutants under different pollution types according to database information in the steps from 1 to 3 and the pollution types; and 5, calculating a total amount of non-point source pollutants in a river according to the dissolved state non-point source loads and the adsorption type non-point source loads. By the method, under the condition that a data condition is limited, a non-point source pollution space distribution feature and a source intensity feature can be quickly obtained based on remotely sensed data; effective pollution monitoring measures can be supplied to a pollution prevention, treatment and management department; and important technology support can be supplied to flow domain pollution management.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a calculation method for non-point source pollution, in particular to a calculation method for non-point source pollution based on remote sensing pixels. Background technique [0002] At present, under the background of effective control of industrial point sources in my country, the situation of agricultural non-point source pollution is becoming more and more serious. Vice Premier Li Keqiang pointed out at the symposium on the application of China's environmental macro strategy research results: rural non-point source pollution has become an important factor affecting the water environment, and nearly half of the country's chemical oxygen demand comes from agricultural pollution sources. Therefore, developing a non-point source pollution estimation model suitable for my country's national conditions is an urgent task for my country's pollution management and co...

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Problems solved by technology

[0005] At present, my country's pollution management department has not yet recommended a technical method, combined with my country's national conditions, it is very necessary to combine the advantages of remote sensing space information acquisition and analysis technology to explore a set of economical and rapid non-point source pollution monitoring and quantification method system

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