Helicopter-borne Electromagnetics (HEM) Area 111 Ellerbeker Rinne

BGR conducted within the EU Interreg-IIIb project "Ancient groundwater reservoirs in buried valleys" (BurVal) an airborne survey in the region of the Ellerbeker Rinne in cooperation with the State Geological Surveys of Schleswig-Holstein (LANU) and Hamburg (BSU). The survey area Ellerbeker Rinne (2005/06) is located to the northwest of the Hanseatic City of Hamburg and is about bounded by the motorway A23 to the west and by Bad Bramstedt to the northeast. The size of the area is about 280 km². The area was surveyed with 7 flights totalling to 908 line-km (235,597 survey points). The nominal separation of the 99 ENE-WSW lines and 6 NNW-SSE tie lines was 400/600 m and 2000 m, respectively. The maps display the geophysical parameters apparent resistivity and centroid depth derived from the HEM data at the five frequencies of the HEM system (0.4 - 130 kHz). Furthermore, horizontal and vertical slices were derived from layered-earth models (resistivities and thicknesses of five model layers).