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Mississippi Delta - Geophysical mapping

3D hydro-geophysical mapping of the Mississippi Delta

New geophysical techniques are needed to help characterize the hydrogeologic properties controlling field-scale groundwater flow and transport in diverse geologic environments. In the project the Hydrogeophysics branch and the USGS and HGG have developed and applied mobile imaging geophysical technology to efficiently assess and monitor aquifer systems and assess and monitor risk to national civil infrastructure. Through joint effort the tTEM and FloaTEM systems has been used to map the hydro geophysical setting in parts of the Missisippi delta. The mapping was carried out both on land and water by means of tTEM and FloaTEM, respectively. The tTEM mapping was carried out at several sites, to investigate 3D geological structures, with special interest in the distribution of sand and clay layers. An information, which is critical with respect to artificial infiltration of the aquifers, in order to provide water for the agriculture in the area. FloaTEM has been applied on the rivers in order to characterize riverbeds sediments and the river water resistivity.

  • US Geological Survey
  • HGG, Department of Geoscience, Aarhus University