Chlorophyll-a Dynamic Monitoring in Chaohu Lake Based on Environmental Satellite 1 CCD Data

Environmental Satellite 1 CCD data can monitor chlorophyll-a timely and correctly due to its short revisiting period and high spatial resolution.So the Environmental Satellite 1 CCD data has good application prospect in chlorophyll-a remote sensing monitoring.Through the experiment of satellite-ground synchronization,the objectives of this paper are to build the model of retrieving chlorophyll-a concentration in Chaohu Lake.The chlorophyll-a concentration in Chaohu Lake is dynamically monitored and analysed in different seasons using the Environmental Satellite 1 CCD data from April in 2009 to March in 2010.An obvious spatial-temporal distribution was found for chlorophyll-a concentration in Chaohu lake,chlorophyll-a concentration had the maximal value in summer and the minimal value in winter,the average chlorophyll-a concentration in autumn was higher than that in spring.The chlorophyll-a concentration in the west of lake was higher than that in the east.Great changes have taken place in the northwest and middle of the lake,while the changes are smaller in the east.