Abstract
In order to investigate the Nansi Lake chlorophyll-a concentration spatial distribution, to better cope with the lake eutrophication of lake water and water quality threat, and to ensure the function of the water transport channel and the storage reservoir in the east line project of the south to North Water Transfer in the lake area. By using the correlation analysis and regression analysis in statistical analysis, the best band of chlorophyll-a retrieval is the combined band of blue band, green band and red band, based on the relationship between measured chlorophyll-a concentration and Landsat 8 the reflection values of each band. On the basis of this, the regression fitting equation is constructed. Through the accuracy analysis, the inversion error is smaller and the fitting degree is 0.7, which has good applicability. In 2015, the results show that the chlorophyll-a concentration in Nansi Lake in January was as high as 10mg/m3. The concentration of chlorophyll-a in the lake coast is much higher than the central of the lake area. And the concentration of the Weishan Lake in the lower Lake area is higher than that of the other lake areas.
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