© 2003 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
An overview of seabed-mapping technologies in the context of marine habitat classification
a CEFAS Burnham Laboratory Remembrance Avenue, Burham-on-Crouch, Essex CM0 8HA, UK
b Geological Survey of Sweden, Division of Marine Geology Box 670, S-75128, MUppasala, Sweden
c GEMEL, Stnd'Etude en Baie de Somme, Quai Jeanne d'Arc 80230 St Valery-s/Somme, France
d Geological Survey of Canada, Bedford Institute of Oceanography PO Box 1006, Dartmouth, Canada NS B2Y 4AZ
e Netherlands Institute of Applied Geosciences, TNO PO Box 80015, NL3508 TA Utrecht, The Netherlands
f ICIT Heriot-Watt University, Old Academy Back Road, Stromness, Orkney, KW16 3AW, UK
*Correspondence to A. J. Kenney. e-mail: a.j.kenny{at}cefas.co.uk.
A wide range of seabed-mapping technologies is reviewed in respect to their effectiveness in discriminating benthic habitats at different spatial scales. Of the seabed attributes considered important in controlling the benthic community of marine sands and gravel, sediment grain size, porosity or shear strength, and sediment dynamics were highlighted as the most important. Whilst no one mapping system can quantify all these attributes at the same time, some may be estimated by skilful interpretation of the remotely sensed data. For example, seabed processes or features, such as bedform migration, scour, slope failure, and gas venting are readily detectable by many of the mapping systems, and these characteristics in turn can be used to assist a habitat classification (and monitoring) of the seabed. We tabulate the relationship between "rapid" continental shelf sedimentological processes, the seabed attributes affecting these processes, and the most suitable mapping system to employ for their detection at different spatial scales.
Keywords: seabed-mapping technologies, swath system, single-beam system
Received 2 May 2002; accepted 12 December 2002.
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