GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 3.2 GNGTS 2024 Figure 2: Comparison of standard inversion and bathymetric inversion of FloaTEM data. Top right: bathymetry incorporated in the inversion; Botom lef: standard inversion, without bathymetry incorporaton; Top lef: rato between inversion with/without bathymetry incorporaton; Botom right: histogram of the rato of the resistvity values of the two inversions. In the Ijsselmeer survey (fg. 3) the geological setng was diferent and so was the goal: the IJsselmeer was part of the North Sea, but ì in 1932 a 32 km long damn was built, which separated the IJsselmeer from the North Sea; thus, the water gradually freshened, but salty water pockets remain below the lake, separated by a few meters thick discontnuous clay layer. To map the clay layer and understand the interacton between saltwater and freshwater, over 65 km of FloaTEM data were acquired in a 3-day-long campaign in the western shore of the lake, close