As part of the long term Framework contract with the Walloon government, G-tec  completed a multibeam and seismic refraction survey downstream of Anseremme and Houx dams on the Meuse river in Southern Belgium.

This refraction seismic survey consisted in the realization of several parallel seismic lines, with hydrophones placed on the riverbed and was aimed to determine the presence and hardness of bedrock in between both dams.

Map location