Vattenfall and Metsähallitus have awarded GEOxyz and Arctia the geophysical research contract required for the engineering of the Korsnäs offshore wind farm development, located in the Bothnian Gulf, Finland.
This project is part of the first leasing round for offshore wind developments in Finland. The research involves mapping a 280 km² offshore wind farm area and two alternative corridors for the export cables to tie into the power grid. Survey work will start using Arctia's Kaiku and Keila1 survey vessels, equipped with sensors to map the seabed morphology in high detail (multibeam echosounder) and shallow geology (sub-bottom profiler). A side-scan sonar and magnetometer will be towed to identify natural features (boulders) and man-made objects (wrecks, cables) and classify the seabed in combination with sediment sampling. Later, GEOxyz will mobilise the 55-metre Geo Ocean VI to conduct a 2D Ultra-High-Resolution-Seismic (UHRS) survey to obtain insight into the sub-seabed geology up to 100 metres below the seabed. The water depths in the research area range from 1 to 50 metres, and the terrain is characterised by steep slopes and expected high variability in geological characteristics.
