Calibration of density driven flow model for the freshwater lens beneath the North Sea island Borkum by geophysical data

H. Sulzbacher, H. Wiederhold, M. Grinat, J. Igel, T. Burschil, T. Günther, B. Siemon, K. Hinsby

Research output: Contribution to conferencePaper at conferencepeer-review

2 Citations (Scopus)

Abstract

With the aim to be able to estimate climate change impacts on coastal aquifers and especially the situation of barrier islands in the Wadden Sea a numerical model is set up for the North Sea island of Borkum. The work is done in the frame of the EU Interreg project CLIWAT. The database includes information from drillings, seismic measurements, an airborne electromagnetic survey (HEM) and monitoring data from two vertical electrode chains as well as measurements of groundwater table, pumping and slug tests, water samples. The groundwater model has been set up by the finite-element programme FEFLOW. The density driven flow model can be calibrated successfully on the base of hydraulic, hydrological and geophysical data. Verification runs with the calibrated model show a good agreement for the measured and computed hydraulic heads and the measured with computed TDS-data. This is the case as well on a large scale for the whole freshwater lens as also on a small scale in the area of the well fields.

Original languageEnglish
Publication statusPublished - 2011
Event17th European Meeting of Environmental and Engineering Geophysics, Near Surface 2011 - Leicester, United Kingdom
Duration: 12 Sep 201114 Sep 2011

Conference

Conference17th European Meeting of Environmental and Engineering Geophysics, Near Surface 2011
Country/TerritoryUnited Kingdom
CityLeicester
Period12/09/1114/09/11

Programme Area

  • Programme Area 2: Water Resources

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