Publication Abstract

Utility of existing single-beam ‘Digital Survey Bathymetry’ for identifying potential Marine Protected Areas

R. Coggan*, M. Diesing*, K. Vanstaen*

This poster demonstrates two topographic images of the central English Channel, derived primarily from single beam acoustic data, known as ‘Digital Survey Bathymetry’ (DSB). Each image covers an area about 100 x 50 km (70 x 30 miles), and reveals remarkable detail of the surface expression of the underlying geology and the erosion and transport features that give shape to the current-day seabed.

Such images are particularly useful in broadscale habitat mapping, allowing seabed interpretation on a regional scale and providing confidence in delineating (mapping) the different seabed facies. This confidence can be critical to effective management.

We have used these images to complement site-specific surveys designed to locate and characterise rocky reef habitats, which will soon be afforded a measure of protection under the EU Habitats Directive. The DSB helped us to accurately delineate areas of the seabed containing rocky reefs, providing an important evidence-base in the process of designating Marine Protected Areas.

Reference

R. Coggan*, M. Diesing*, K. Vanstaen* (2008) Utility of existing single-beam ‘Digital Survey Bathymetry’ for identifying potential Marine Protected Areas. GeoHab Conference, Alaska, May 2008