Terrestrial Water Storage from GRACE and Satellite Altimetry in the Okavango Delta (Botswana)

Ole Baltazar Andersen, Pernille Engelbredt Krogh, Peter Bauer-Gottwein, S. Leiriao, R. Smith, Philippa Berry

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Abstract

New technology can for the first time enable the accurate retrieval of the global and regional water budgets from space-borne and ground-based gravity surveys. Water is mankind’s most critical natural resource, but it is being heavily used throughout the globe. The aim of this paper is to outline the HYDROGRAV project dealing with improving large scale hydrological model with time variable gravity observations. Also preliminary HYDROGRAV investigationsa of terrestrial water storage variations in the Okavango delta in Botswana are presented. Data from 4 years of satellite altimetry, GRACE derived TWS and GLDAS hydrological model all show a clear annual variation corresponding to the well known seasonality of the delta. However, they also all show an increasing trend in the amount of water storage in the region over the last 4 years.
Original languageEnglish
Title of host publicationGravity, Geoid and Earth Observation
EditorsS. P. Mertikas
Number of pages538
Volume135/ 7
PublisherSpringer
Publication date2010
Pages521-526
ISBN (Print)978-3-642-10633-0
DOIs
Publication statusPublished - 2010
EventInternational Symposium on Gravity, Geoid and Earth Observation - Chania, Greece
Duration: 23 Jun 200827 Jun 2008

Conference

ConferenceInternational Symposium on Gravity, Geoid and Earth Observation
CountryGreece
CityChania
Period23/06/200827/06/2008

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