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Frequency-domain Helicopter-borne EM Survey for Delineation of the 3D Chloride Distribution in Zeeland, the NetherlandsNormal access

Authors: B. Siemon, E. van Baaren, W. Dabekaussen, J. Delsman, M. Karaoulis, P. de Louw, P. Pauw, T. Vermaas, H. Bootsma, A. Steuer, J. Gunnink, G. Oude Essink and U. Meyer
Event name: Second European Airborne Electromagnetics Conference
Session: Airborne EM
Publication date: 03 September 2017
DOI: 10.3997/2214-4609.201702177
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 4.52Mb )
Price: € 20

In the project FRESHEM Zeeland the entire Province of Zeeland in the south-western part of the Netherlands was surveyed using frequency-domain helicopter-borne electromagnetics (FDHEM). The airborne survey of more than 9000 line-km was conducted in 2014-15 by the German Federal Institute for Geosciences and Natural Resources (BGR). Together with the Dutch partners Deltares and TNO, an approach has been developed to translate the FDHEM data into a full 3D mapping of the chloride concentration of an area of about 1800 km². Verification with an independent dataset showed that groundwater salinity can be accurately calculated based on FDHEM measurements and a stochastic lithological model. Using indicator kriging as interpolation method turns out to be suitable to construct a 3D voxel model, revealing high resolution spatial patterns of groundwater salinity.

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