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Proceedings Paper

Analyzing the 2007 drought of Poyang Lake Watershed with MODIS-derived normalized difference water deviation index
Author(s): Wenjiang Zhang; Xiaoming Cao; Jian Peng
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Paper Abstract

The autumn of 2007 has seen the most serious drought of last 30 years in the Poyang Lake Watershed (PLW, for short), which resulted in the sharp shrinkage of Poyang Lake from 3000 km2 of normal water coverage sharply to about only 50 km2 at drought peak. This paper adopted the data products of Moderate Resolution Imaging Spectroradiometer (MODIS, boarding on NASA satellites of Terra and Aqua) to analyze temporal process and spatial extension of this Drought in PLW. MODIS-derived Normalized Difference Water Deviation Index (NDWDI, for short) was calculated to examine the water balance of soil against background level, which was expressed with the NDWI average during 2000~2007. Though the Poyang Lake experienced sharp shrinkage in water area, the region near the Lake didn't show corresponsive serious water stress in NDWDI image series. This fact lies in that though the river runoff into the Lake decreased obviously, the soil of lake basin was exposed to less l water stress as the low terrain can easily supply water balance via ground flux.

Paper Details

Date Published: 10 September 2008
PDF: 8 pages
Proc. SPIE 7083, Remote Sensing and Modeling of Ecosystems for Sustainability V, 70831G (10 September 2008); doi: 10.1117/12.797552
Show Author Affiliations
Wenjiang Zhang, Sichuan Univ. (China)
Xiaoming Cao, Xinjiang Institute of Ecology and Geography (China)
Jian Peng, Peking Univ. (China)

Published in SPIE Proceedings Vol. 7083:
Remote Sensing and Modeling of Ecosystems for Sustainability V
Wei Gao; Hao Wang, Editor(s)

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