Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/hess-2016-653
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
07 Feb 2017
Review status
This discussion paper is under review for the journal Hydrology and Earth System Sciences (HESS).
Daily GRACE gravity field solutions track major flood events in the Ganges-Brahmaputra Delta
Ben T. Gouweleeuw1, Andreas Kvas2, Christian Grüber1, Animesh K. Gain1, Thorsten Mayer-Gürr2, Frank Flechtner1, and Andreas Güntner1 1Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, 14473 Potsdam, Germany
2Graz University of Technology, Institute of Geodesy, 8010 Graz, Austria
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.

Citation: Gouweleeuw, B. T., Kvas, A., Grüber, C., Gain, A. K., Mayer-Gürr, T., Flechtner, F., and Güntner, A.: Daily GRACE gravity field solutions track major flood events in the Ganges-Brahmaputra Delta, Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2016-653, in review, 2017.
Ben T. Gouweleeuw et al.
Ben T. Gouweleeuw et al.
Ben T. Gouweleeuw et al.

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