Method for automatically extracting water pollution information

Abstract

The invention discloses a method for automatically extracting water body pollution information. The method comprises the following steps: (1) calculating water discharging reflectivity of a water area to be detected; (2) establishing a water quality remote sensing model; and (3) performing inversion with a water body spectral curve according to the water quality remote sensing model to obtain water quality parameters. A plurality of applicable tests on the method prove that the method has high precision and basically meets practical requirements. Images of test results can inverse spatial distribution situation of water quality in an area, and the distribution characteristics of the water pollution accord with the obtained information. Transboundary pollution situation is also reflected. Large and medium-sized pollution source situations can be reflected, such as pollution source position, pollution scale and range of influence range, thus providing quite useful information for controlling and treating pollution.

Description

Technical field [0001] The invention belongs to the technical field of water quality remote sensing, and particularly relates to a method for automatically extracting water pollution information through remote sensing inversion. Background technique [0002] Remote sensing technology can well reflect the water quality status of a wide range of water bodies and has great potential in regional water environment monitoring. The quantification degree of remote sensing inversion directly determines the effectiveness of remote sensing monitoring of water environment. Therefore, the quantification of water quality remote sensing is extremely important. Early water pollution remote sensing was based on the qualitative investigation of the pollution situation according to the degree of change in the color tone of the polluted waters. [0003] Two types of methods are mainly used at this stage. One is to use empirical model methods, that is, to measure the spectral characteristics of vario...

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Problems solved by technology

[0004] The inventor of the present application once established a physical model between the pollution concentration and the water body reflection spectrum based on the physical process generated by the reflection spectrum of the water body, and applied it to the extraction of pollution information in the waters of the Pearl River, and achieved good results, but the model did not Considering the effect of yellow matter, the consideration of the scattering and reflection characteristics of the suspension is not comprehensive enough. In the case of high water turbidity, the accuracy of water quality parameter calculation is still greatly affected

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