Calibrating Vadose Zone Models with Time-Lapse Gravity Data

Lars Christiansen, A. B. Hansen, M. C. Looms, E. B. Haarder, Philip John Binning, Dan Rosbjerg, Ole Baltazar Andersen, Peter Bauer-Gottwein

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

Abstract

A change in soil water content is a change in mass stored in the subsurface. Given that the mass change is big enough, the change can be measured with a gravity meter. Attempts have been made with varying success over the last decades to use ground-based time-lapse gravity measurements to infer hydrogeological parameters. These studies focused on the saturated zone with specific yield as the most prominent target parameter. Any change in storage in the vadose zone has been considered as noise. Our modeling results show a measureable change in gravity from the vadose zone during a forced infiltration experiment on 10m by 10m grass land. Simulation studies show a potential for vadose zone model calibration using gravity data in conjunction with other geophysical data, e.g. cross-borehole georadar. We present early field data and calibration results from a forced infiltration experiment conducted over 30 days and discuss the potential for gravity measurements in vadose zone model parameter estimation.
Original languageEnglish
Title of host publicationAGU Fall Meeting Abstracts
PublisherAmerican Geophysical Union
Publication date2009
PagesH52B-05
Publication statusPublished - 2009
EventAmerican Geophysical Union Fall Meeting 2009 - San Francisco, United States
Duration: 14 Dec 200918 Dec 2009
http://www.agu.org/meetings/fm09/

Conference

ConferenceAmerican Geophysical Union Fall Meeting 2009
CountryUnited States
CitySan Francisco
Period14/12/200918/12/2009
Internet address

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