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Analysis of Water Storage Variation in Yangtze River Basin and Three Gorges Dam Area using GRACE Monthly Gravity Field Model  

Huang, He (성균관대학교 건설환경연구소)
Yun, Hong-Sic (성균관대학교 사회환경시스템공학과)
Lee, Dong-Ha (성균관대학교 건설환경시스템공학과)
Jeong, Tae-Jun (성균관대학교 건설환경시스템공학과)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.27, no.3, 2009 , pp. 375-384 More about this Journal
Abstract
The GRACE satellite, Launched in March 2002, is applied to research on glacial melt of polar regions, glacial isostatic adjustment(GIA), sea level change, terrestrial water storage(TWS) variation of river basin and large-scale earthquake etc. In this research, the TWS variation of Yangtze river basin from August, 2002 to January, 2009 is analyzed using Level-2 GRACE monthly gravity field model. Particularly, gravity changes of the Three Gorges Dam during the impoundment process in 2003, 2006 and 2008 is observed by estimating equivalent water thickness(EWT). The research results show the distinct annual and seasonal changes of Yangtze river basin, and its amplitude of annual variation is 2.3cm. In addition, we compare the results with water resource statistics and hydrologic observation data to confirm the possibility of research of TWS variation of river basin using GRACE observation data, and also the satellite gravity data is of great help for the research on the movement and periodic changes of river basin.
Keywords
Yangtze River Basin; Three Gorges Dam; GRACE monthly gravity field; Terrestrial Water Storage; Equivalent Water Thickness;
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