HR: 16:45h
AN: G14A-06 INVITED     [Abstracts]
TI: Seasonal Fluctuations of Water Storage in the Mekong River Basin from Satellite Altimetry, GRACE and other Remote Sensing data
AU: Ramillien, G
EM: ramillie@notos.cst.cnes.fr
AF: LEGOS, 14 Avenue Edouard Belin, Toulouse, 31400 France
AU: Frappart, F
EM: frappart@notos.cst.cnes.fr
AF: LEGOS, 14 Avenue Edouard Belin, Toulouse, 31400 France
AU: Lhermitte, J
EM: julien.lhermitte@cesbio.cnes.fr
AF: CESBIO, 18 Avenue Edouard Belin, Toulouse, 31400 France
AU: Do Minh, K
EM: dominh@notos.cst.cnes.fr
AF: LEGOS, 14 Avenue Edouard Belin, Toulouse, 31400 France
AU: * Cazenave, A
EM: anny.cazenave@cnes.fr
AF: LEGOS, 14 Avenue Edouard Belin, Toulouse, 31400 France
AU: Le Toan, T
EM: thuy.letoan@cesbio.cnes.fr
AF: CESBIO, 18 Avenue Edouard Belin, Toulouse, 31400 France
AU: Mognard, N
EM: nelly.mognard@cnes.fr
AF: LEGOS, 14 Avenue Edouard Belin, Toulouse, 31400 France
AB: We investigate the seasonal water storage over the Mekong basin using GRACE data over 2002-2004 which provides the total water storage (soil and underground waters plus surface waters). In parallel, we determine the seasonal variations of the surface water volume using 6 years (1998-2004) of SPOT/Vegetation imagery and Topex/Poseidon, ERS-2 and ENVISAT altimeter data. Surface water heights over seasonally inundated areas are measured using combined altimetry data from Topex/Poseidon, ERS-2 and ENVISAT. The seasonally varying extent of the inundated areas are derived from SPOT/Vegetation NDVI data. Over the common period of data (2002-2004), the surface water storage is subtracted to the total GRACE water storage to estimate the soil and underground water contributions. These results are compared with global/regional hydrological predictions. We also investigate the spatio-temporal response of each reservoir (surface, upper soil and underground water reservoirs) to seasonal precipitation forcing.
DE: 1821 Floods
DE: 1890 Wetlands
DE: 9320 Asia
SC: Geodesy [G]
MN: 2005 Joint Assembly