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Proceedings Paper

ETM monitoring model on suspended sediment concentration in different seasons in Taihu Lake, China
Author(s): Yuchun Wei; Jiazhu Huang; Xuwen Li; Jie Guang
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Paper Abstract

The Taihu Lake in China is shallow and turbid. Its water body covers 2338 km2, and water depth varies between 2 and 4 meters. To monitor water quality in such a large lake, TM is probably the best remote sensing data due to its spatial resolution. While some modeling works have been done on relationships between total suspended sediment concentration (SS) and reflectance in TM image, the TM bands being used in the model are still under discussion. In this paper, a model was developed on relationships between SS and ETM in summer and winter in Taihu Lake. ETM image is geo-referenced with 1:50,000 topographic map and digital number of pixel is converted to planetary reflectance. An index called NDSS from ETM image is introduced, where NDSS= (B3-B1)/(B3+B1). The ETM monitoring model of SS in summer and winter was built through regression analysis. The basic model form is SS=f(NDSS), goodness-of-fit statistics R2 is from 0.51 to 0.72, and the model is significant under p=0.005. Obvious difference exists between the summer model and winter model. In the summer model, spatial variation of water body must be considered due to the dynamic water environment. The same variation, however, can be ignored in winter model.

Paper Details

Date Published: 19 May 2006
PDF: 8 pages
Proc. SPIE 6199, Remote Sensing and Space Technology for Multidisciplinary Research and Applications, 619902 (19 May 2006); doi: 10.1117/12.673651
Show Author Affiliations
Yuchun Wei, Nanjing Normal Univ. (China)
Jiazhu Huang, Nanjing Normal Univ. (China)
Xuwen Li, Jiangsu Provincial Environmental Information Ctr. (China)
Jie Guang, Nanjing Normal Univ. (China)


Published in SPIE Proceedings Vol. 6199:
Remote Sensing and Space Technology for Multidisciplinary Research and Applications
Qingxi Tong; Xiuwan Chen; Allen Huang; Wei Gao, Editor(s)

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