GEOSCAN, résultats de la recherche


TitreMultibeam Bathymetry and LiDAR Surveys of the Bay of Fundy, Canada - progress to November 2008
AuteurParrott, D R; Todd, B J; Shaw, J; Kostylev, V; Hughes Clarke, J E; Griffin, J; Lamplugh, M; Webster, T
SourceBOFEP 2009 Resource Development and its implications in the Bay of Fundy and Gulf of Maine, book of abstracts; 2009 p. 1
LiensOnline - En ligne
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090334
RéunionBOFEP 2009 Resource Development and its implications in the Bay of Fundy and Gulf of Maine; Wolfville, NS; CA; mai 26-29, 2009
Documentpublication en série
Mediaen ligne; numérique
ProvinceRégion extracotière de l'est
Lat/Long OENS-67.5000 -64.5000 45.5000 44.2500
Sujetslevés géophysiques; bathymétrie; topographie du fond océanique; topographie du fond océanique; milieu côtièr; études côtières; érosion côtière; topographie glaciaire; caractéristiques sous-marines; géophysique; géologie marine; géologie des dépôts meubles/géomorphologie
Résumé(disponible en anglais seulement)
The Bay of Fundy has the largest recorded tides in the world, with a maximum range of about 17 metres. Tidal current velocities that exceed 4.5 m s-1 are currently being studied to determine the potential for instream tidal electrical power generation. In 2006, the Geological Survey of Canada, in conjunction with the Canadian Hydrographic Service and several universities, commenced a program to map the seabed of the Bay of Fundy on the east coast of Canada. About 12,500 km2 of multibeam bathymetry have been collected in the bay. Sub-bottom profiler data were collected simultaneously to provide information on the character and thickness of the sediments on the sea floor. Large intertidal areas were surveyed using airborne Light Detection and Ranging (LiDAR), providing an opportunity to generate a continuous map of the marine, intertidal and terrestrial areas. Information from geophysical surveys, seafloor samples, photographs and video transects is being integrated to produce surficial geology and benthic habitat maps. Some key findings of the project are:
- Large glacial landforms may provide suitable habitats for fish and shellfish.
- Strong tidal currents are reworking sediments.
- Migration of large sand waves is observed in repetitive multibeam bathymetry surveys.
- Deep tidal-scour channels are present in several areas.
- The distribution and morphology of extensive horse mussel reefs have been mapped.