Daily GRACE gravity field solutions track major flood events in the Ganges-Brahmaputra Delta

Gouweleeuw, B. T., Kvas, A., Grüber, C., Gain, A. K., Mayer-Gürr, T., Flechtner, F. and Güntner, A. (2017) Daily GRACE gravity field solutions track major flood events in the Ganges-Brahmaputra Delta Hydrology and Earth System Sciences Discussions, 22 . pp. 1-23. DOI 10.5194/hess-2016-653.

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Abstract

Two daily gravity field solutions based on observations from the Gravity Recovery and Climate Experiment (GRACE) satellite mission are evaluated against daily river runoff data for major flood events in the Ganges-Brahmaputra Delta (GBD) in 2004 and 2007. The trends over periods of a few days of the daily GRACE data reflect temporal variations in daily river runoff during major flood events. This is especially true for the larger flood in 2007, which featured two distinct periods of critical flood level exceedance in the Brahmaputra River. This first hydrological evaluation of daily GRACE gravity field solutions based on a Kalman filter approach confirms their potential for gravity-based large-scale flood monitoring. This particularly applies to short-lived, high-volume floods, as they occur in the GBD with a 4–5 year return period. The release of daily GRACE gravity field solutions in near real-time may enable flood monitoring for large events.

Document Type: Article
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
DOI etc.: 10.5194/hess-2016-653
ISSN: 1812-2116
Projects: Future Ocean
Date Deposited: 05 Oct 2017 12:40
Last Modified: 25 Apr 2019 09:20
URI: http://eprints.uni-kiel.de/id/eprint/39699

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