In the framework of the PILE & TIDE project, SOACSY and GEOCEAN completed a SEACHIRP survey in the Alderney race (Raz Blanchard).
The PILE & TIDE project is conducted in partnership by GEOCEAN and UCBN (CAEN University). It aims to set up an efficient procedure and methodology for tidal turbines installation. The project is supported by ADEME (Agency for the Environment and Energy Management).
The Alderney Race (the French call it Raz Blanchard) is a strait that runs between Alderney and Cap de la Hague, a cape at the northwestern tip of the Cotentin peninsula in Normandy. A strong current runs through the race. The current is intermittent, varying with the tide, and can run up to about twelve knots during equinoctial tides.
The seabed is mainly rocky with local sands, cobbles, pebbles and gravels areas. The main objective of the survey was to detect and localize these coarse sediments areas.
The SeaChirp measurements were conducted on the CELTIC WARRIOR (15m catamaran) between the 25th and 27th April 2015. The equipment worked well, the collected data quality was fit for purpose and no HSE incident occured.