Lake water body blue-green algae abundance estimation method based on remote sensing

Abstract

The invention discloses a lake water body blue-green algae abundance estimation method based on remote sensing. The method comprises the following steps: carrying out high-spectrum remote sensing measurement on a lake water body by utilizing the concentration ratio of phycocyanin and chlorophyll to represent the blue-green algae abundance, selecting the ratio of remote sensing reflective rates of the two specific wave lengths and a function thereof as characteristics of blue-green algae, establishing an estimation model of the lake water body blue-green algae abundance, and estimating the lake water body blue-green algae abundance based on remote sensing. The method provided by the invention adopts a surface feature spectrograph or an onboard high-spectrum imager to carry out high-spectrum remote sensing on the lake water body, and the remote sensing reflective rate required for estimation can be obtained through performing radiation correction and atmospheric correction on aviation satellite high-spectrum data. The method provided by the invention has the advantages that the accuracy is high, the model is simple, the remote sensing reflective rates of the two wave lengths are selected, not only can the estimation on the water body blue-green algae abundance measured by the surface feature spectrograph be realized, but also the estimation on the blue-green algae abundance by virtue of aviation high-spectrum remote-sensing images is realized.

Description

Technical field [0001] The invention is a remote sensing technology field in the field of remote sensing technology, which involves the remote sensing monitoring method of cyanobacteria in a lake and water body. It specifically involves a estimated method of the extravagant algae in the lake -based lake and water body. Background technique [0002] The lake richness and cyanobacteria water outbreaks are one of the most important environmental issues facing the current global lake. Especially the cyanobacteria water has become the focus of the world's attention to the nutritional control of lakes.The "Three Lakes" of the country's key governance -Taihu, Chaohu and Dianchi Lake Water's outbreaks often occur, which has a great impact on local industrial and agricultural production and the lives of residents, and has caused major economic losses.Water Huahua occurred almost every year in Taihu. In 1990, the Liangwan Bay Lantan Lanta Water Huada, which caused 116 factories in Wuxi Cit...

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Problems solved by technology

[0004] In the prior art, the use of remote sensing to monitor cyanobacteria blooms is mainly achieved by monitoring the concentration of chlorophyll a in the water body. The concentration of chlorophyll a here is the sum of the concentration of chlorophyll a of all algae in the water body, which cannot accurately reflect the content of cyanobacteria in it.

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