River and lake water quality monitoring method based on high-resolution satellite images

Abstract

The invention discloses a river and lake water quality monitoring method based on high-resolution satellite images. The river and lake water quality monitoring method comprises satellite image radiometric calibration, atmospheric correction, RPC orthographic correction, image splicing, automatic water body extraction, water quality quantitative inversion modeling, water quality quantitative inversion model precision verification and water quality quantitative inversion model application. The invention relates to the technical field of inland water environment remote sensing science, in particular to a river and lake water quality monitoring method based on a high-resolution satellite image, which has the advantages of wide monitoring range, high speed, low cost and convenience in long-termdynamic monitoring by utilizing a remote sensing technology. A multiple linear regression model between different water quality parameter concentrations and image waveband reflectivity is establishedby combining sampling data of a water quality monitoring station and representation of various substances in a water body on a remote sensing image, and a relative error and an absolute error of themodel are calculated according to an inversion result, so as to promote the model, and water quality evaluation of the whole river and even a water area with a larger range is achieved.

Description

technical field [0001] The invention relates to the field of inland water environment remote sensing science and technology, in particular to a river and lake water quality monitoring method based on high-resolution satellite images. Background technique [0002] River and lake water quality monitoring is one of the main contents of environmental monitoring. It is an accurate, timely and comprehensive reflection of the current development trend of water quality, providing scientific basis for water environment management, pollution source control, environmental planning, etc. It also plays a vital role in maintaining the ecological health of rivers and lakes. At present, the methods of river and lake water quality monitoring mainly rely on traditional physical and chemical monitoring, that is, to determine monitoring sites or outlets, arrange sampling time, sampling frequency and sampling parameters, conduct regular sampling, and conduct indoor physical and chemical analysis...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a river and lake water quality monitoring method based on high-resolution satellite images, which solves the problem that there are too many uncontrolled factors in the entire monitoring process, resulting in the inability to guarantee the accuracy and authenticity of the monitoring results. Monitoring limited water quality stations cannot achieve overall monitoring. The number of monitoring points determines the monitoring cost. The number of monitoring points is small, and the monitoring effect is not good. There are many monitoring points, and the cost is high. It is difficult to control the cost when monitoring large-scale waters. It can be monitored regularly, but it is impossible to achieve continuous long-term dynamic monitoring

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