Chlorophyll inversion method based on different types of inland water bodies

Abstract

The invention relates to a chlorophyll a inversion method based on different types of inland water bodies. The chlorophyll a concentration of a water body is inverted by combining an actually measured water body spectrum curve, water quality parameters and a remote sensing image. Based on the actually measured water body spectrum curve, utilizing a K-means clustering method of successive declining to classify the water body, and according to each type of average water body spectrum curve, taking a spectrum angle as distance measurement, and matching to realize remote sensing image water body classification; and further respectively constructing chlorophyll a inversion models suitable for different types of water bodies. According to the method, the problems that a traditional chlorophyll a inversion method is single in model and low in precision are solved, classification of inland water bodies based on different spectrum dominant factors is achieved, the chlorophyll a optimal inversion models are established for different types of water bodies after classification, the prediction precision of the chlorophyll a of the water bodies is improved, effective technical support is provided for preventing and treating water eutrophication and accurately monitoring spatial distribution of chlorophyll a in water and the variation trend of chlorophyll a along with time.

Description

technical field [0001] The invention relates to the technical field of water body remote sensing inversion, in particular to a chlorophyll-a inversion method based on different types of inland water bodies. Background technique [0002] Chlorophyll-a concentration is an important water quality parameter to measure the degree of eutrophication of water bodies. Monitoring chlorophyll-a concentration is of great significance to prevent and control eutrophication of inland water bodies and ensure the sustainable development and utilization of watershed ecology. [0003] The traditional water quality investigation method is time-consuming and laborious, and the strategy of "substituting points for areas" is usually adopted. A small number of measured values ​​are often difficult to fully reflect the overall temporal and spatial distribution of chlorophyll-a in water bodies, and the cost is high. The development of remote sensing technology provides a convenient and efficient scie...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for inversion of chlorophyll-a based on different types of inland water bodies, which overcomes the problem of using a single model to invert different types of water bodies The problem of low accuracy of chlorophyll-a concentration, the optimal inversion model of chlorophyll-a suitable for different types of water bodies is obtained, which provides scientific and reasonable theoretical reference for accurately monitoring and protecting the inland water environment, revealing the causes of water quality changes in river basins and effectively controlling them

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