1. HydroGeophysics Group, Department of Geoscience, Aarhus University, Building 1120, C.F. Møllers Alle 4, 8000 Aarhus C, Denmark
2. Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, building 115, 2800 Kgs. Lyngby, Denmark
3. Department of Groundwater and Quaternary Geology Mapping, Geological Survey of Denmark and Greenland (GEUS), Building 1110, C.F. Møllers Alle 8, 8000 Aarhus C, Denmark