Salinisation map 2014 — helicopter measurements

These are the data points of the first measurement campaign of the electromagnetic research carried out from the air on the East Coast (Knokke-Heist, Bruges and Damme) in April 2014 in which the resistance of the subsurface was determined. A helicopter then flew parallel lines with an intermediate distance of 250 m, with the exception of the Zwin where an intermediate distance of 100 m was used. The data on these flight lines was used together with the data of the second measurement campaign (2017) to create the salinisation map 2014/2017 and indicates where effective measurement was made. The data points also include resistivity profiles. These represent the resistance distribution in the subsurface along the flight line on which the data point is located. It is a representation of bulk resistance, i.e. the general resistance of the subsoil (sediment + groundwater). The value of 6 ohm.m. is generally considered the boundary between sweet and salty sediments. In the figures there are regular interruptions, at these locations the helicopter could not perform reliable measurement. The horizontal resolution of these figures is the measurement resolution of the helicopter, with approximately one measurement per 40 m. The vertical resolution is the layer layout according to the inversion method used.