Analyzing the 2007 drought of Poyang Lake Watershed with MODIS-derived normalized difference water deviation index

Wenjiang Zhang; Xiaoming Cao; Jian Peng

doi:10.1117/12.797552

10 September 2008 Analyzing the 2007 drought of Poyang Lake Watershed with MODIS-derived normalized difference water deviation index

Wenjiang Zhang, Xiaoming Cao, Jian Peng

Author Affiliations +

Proceedings Volume 7083, Remote Sensing and Modeling of Ecosystems for Sustainability V; 70831G (2008) https://doi.org/10.1117/12.797552
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Wenjiang Zhang, Xiaoming Cao, and Jian Peng "Analyzing the 2007 drought of Poyang Lake Watershed with MODIS-derived normalized difference water deviation index", Proc. SPIE 7083, Remote Sensing and Modeling of Ecosystems for Sustainability V, 70831G (10 September 2008); https://doi.org/10.1117/12.797552

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