Variation of chlorophyll a concentration before an algal bloom in Taihu Lake detected by MODIS/Terra imagery
The occurrence of algal bloom has threatened the water quality of Taihu Lake that provides drinking water for millions of people in the eastern Chinese city of Wuxi,Jiangsu Province.Chlorophyll a presented in living phytoplankton is a very important ecological and environmental parameter of waters and it is usually used as indicator of the algal bloom.To assess changes in chlorophyll a concentration distributions before an algal bloom in Taihu Lake on May 29,2007,a linear model was established between the radio of band 1 (620-670nm) to band 2 (841-876nm) of the MODIS mediumresolution bands and the in situ measurements of chlorophyll a concentration.The distributions of chlorophyll a concentration are mapped.The phytoplankton patches are evenly distributed over the Taihu Lake during March 2007,while the patches are confined to north part of the lake along the bank during May 2007,including Meiliang Bay where the water supply of Wuxi city is.This study demonstrates that the moderately high resolution of MODIS/Terra 250-m data is useful for monitoring the chlorophyll a distribution in small inland water body such as Taihu Lake.
MODIS Taihu Lake chlorophyll
Dazhao LIU Chuqun CHEN Luhua ZHAO Dingtian YANG Dongyang FU
Guang Dong Ocean University,Zhanjiang,524088,China;LED,South China Sea Institute of Oceanology,Chine LED,South China Sea Institute of Oceanology,Chinese Academy of Sciences Guangzhou,510300,China Henan Quality Polytechnic,Pingdingshan 467000,China Guang Dong Ocean University,Zhanjiang,524088,China
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）