SITE INVESTIGATION con-tractor Exploration Associates' Land & Marine Survey Division recently finished a hydro-graphic and geophysical survey around Jersey, involving bathy- metric, side scan sonar and seismic profiling in St Ouen's Bay.
The investigation forms part of ongoing investigations for the Jersey Shoreline Management Scheme. A combination of sand denudation and crumbling Second World War German sea defences prompted the initiative, which involves the Public Services Department of Jersey and the tourism industry.
The study determined the thickness and location of sand banks over the whole of the 7km wide bay up to 5km offshore. At key headlands, tide gauges were set up to ascertain localised tidal regimes. Drogue tracking determined the variation of subsurface currents during tidal cycles to enable the calibration of a hydrodynamic model.