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Proceedings Paper

Variation of chlorophyll: a concentration before an algal bloom in Taihu Lake detected by MODIS/Terra imagery
Author(s): Dazhao Liu; Chuqun Chen; Luhua Zhao; Dingtian Yang; Dongyang Fu
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Paper Abstract

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.

Paper Details

Date Published: 3 November 2008
PDF: 8 pages
Proc. SPIE 7145, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Monitoring and Assessment of Natural Resources and Environments, 714502 (3 November 2008); doi: 10.1117/12.812977
Show Author Affiliations
Dazhao Liu, Guangdong Ocean Univ. (China)
South China Sea Institute of Oceanology (China)
Chuqun Chen, South China Sea Institute of Oceanology (China)
Luhua Zhao, Henan Quality Polytechnic (China)
Dingtian Yang, South China Sea Institute of Oceanology (China)
Dongyang Fu, Guangdong Ocean Univ. (China)


Published in SPIE Proceedings Vol. 7145:
Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Monitoring and Assessment of Natural Resources and Environments
Lin Liu; Xia Li; Kai Liu; Xinchang Zhang; Yong Lao, Editor(s)

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