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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