Salameh, E and Frappart, F and Papa, F and Güntner, A and Venugopal, V and Getirana, A and Prigent, C and Aires, F and Labat, D and Laignel, B (2017) Fifteen years (1993-2007) of surface freshwater storage variability in the ganges-brahmaputra river basin using multi-satellite observations. In: Water (Switzerland), 9 (4).
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Abstract
Surface water storage is a key component of the terrestrial hydrological and biogeochemical cycles that also plays a major role in water resources management. In this study, surface water storage (SWS) variations are estimated at monthly time-scale over 15 years (1993-2007) using a hypsographic approach based on the combination of topographic information from Advance Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Hydrological Modeling and Analysis Platform (HyMAP)-based Global Digital Elevation Models (GDEM) and the Global Inundation Extent Multi-Satellite (GIEMS) product in the Ganges-Brahmaputra basin. The monthly variations of the surface water storage are in good accordance with precipitation from Global Precipitation Climatology Project (GPCP), river discharges at the outlet of the Ganges and the Brahmaputra, and terrestrial water storage (TWS) from the Gravity Recovery And Climate Experiment (GRACE), with correlations higher than 0.85. Surface water storage presents a strong seasonal signal (~496 km3 estimated by GIEMS/ASTER and ~378 km3 by GIEMS/HyMAPs), representing ~51 and ~41 respectively of the total water storage signal and it exhibits a large inter-annual variability with strong negative anomalies during the drought-like conditions of 1994 or strong positive anomalies such as in 1998. This new dataset of SWS is a new, highly valuable source of information for hydrological and climate modeling studies of the Ganges-Brahmaputra river basin.
| Item Type: | Journal Article |
|---|---|
| Publication: | Water (Switzerland) |
| Publisher: | MDPI AG |
| Additional Information: | The copyright for this article belongs to MDPI AG. |
| Keywords: | Biogeochemistry; Floods; Geodetic satellites; Precipitation (meteorology); Rivers; Satellites; Surface discharges; Surface water resources; Water resources; Watersheds, Advance spaceborne thermal emission and reflection radiometers; Brahmaputra; Flood-plains; Ganges-brahmaputra basins; Global precipitation climatology projects; Gravity recovery and climate experiments; Multi-satellite observations; Water resources management, Surface waters, annual variation; ASTER; climate modeling; drought; floodplain; hydrological modeling; river basin; river discharge; satellite data; water resource; water storage, Brahmaputra Basin; Ganges Delta |
| Department/Centre: | Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences |
| Date Deposited: | 20 Jul 2022 06:39 |
| Last Modified: | 20 Jul 2022 06:39 |
| URI: | https://eprints.iisc.ac.in/id/eprint/74894 |
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