Author/Authors :
Frappart، نويسنده , , Frédéric and Papa، نويسنده , , Fabrice and Güntner، نويسنده , , Andreas and Werth، نويسنده , , Susanna and Santos da Silva، نويسنده , , Joecila and Tomasella، نويسنده , , Javier and Seyler، نويسنده , , Frédérique and Prigent، نويسنده , , Catherine and Rossow، نويسنده , , William B. and Calmant، نويسنده , , Stéphane and Bonnet، نويسنده , , Marie-Paule، نويسنده ,
Abstract :
This study presents monthly estimates of groundwater anomalies in a large river basin dominated by extensive floodplains, the Negro River Basin, based on the synergistic analysis using multisatellite observations and hydrological models. For the period 2003–2004, changes in water stored in the aquifer is isolated from the total water storage measured by GRACE by removing contributions of both the surface reservoir, derived from satellite imagery and radar altimetry, and the root zone reservoir simulated by WGHM and LaD hydrological models. The groundwater anomalies show a realistic spatial pattern compared with the hydrogeological map of the basin, and similar temporal variations to local in situ groundwater observations and altimetry-derived level height measurements. Results highlight the potential of combining multiple satellite techniques with hydrological modeling to estimate the evolution of groundwater storage.
