Introducing the Okavango Delta, Botswana, airborne TEM survey

J. E. Podgorski, L. Kgotlhang, T. Ngwisanyi, C. Ploug, E. Auken, W. Kinzelbach, A. G. Green

Research output: Contribution to conferencePaper at conferencepeer-review

1 Citation (Scopus)

Abstract

The Okavango Delta, Botswana, is one of the largest inland deltas on the planet and is unique in that surface water remains remarkably fresh despite evapotranspiration being the dominant water removal mechanism. To help understand the phenomena of salt sequestration, airborne transient electromagnetic TEM data with 2 km line spacing were acquired over the entire delta in 2007-2008. These data have been inverted using a quasi-2D least-squares linear optimization scheme to produce a 5-layer resistivity model to 250 m depth. Comparison of the model with available borehole data shows a strong correlation between resistivity and lithology and salinity. Further analysis should contribute significantly to understanding the hydrogeology of the delta.

Original languageEnglish
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event16th European Meeting of Environmental and Engineering Geophysics, Near Surface 2010 - Zurich, Switzerland
Duration: 6 Sep 20108 Sep 2010

Conference

Conference16th European Meeting of Environmental and Engineering Geophysics, Near Surface 2010
Country/TerritorySwitzerland
CityZurich
Period6/09/108/09/10

Programme Area

  • Programme Area 2: Water Resources

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