Jan Scholten

Submarine groundwater discharge (SGD) is associated with a significant input of dissolved matter into coastal environments, which may result in eutrophication. To fully understand the overall environmental impacts information on the areal extent of SGD is required. Therefore, spatial mapping techniques are needed. We propose to develop a mobile mapping technique, which is based on the electric resistivity of interstitial waters in sediments. Electric resistivity is higher for freshwater compared to seawater. Simultaneous high-resolution seismic measurements add stratigraphical information for a better understanding of the geological subsurface structures determining the occurrence of SGD. The results will be compared with electric conductivity measurements in-situ and with a GIS flow accumulation model.