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Titre2004 Grand Banks iceberg scour survey
AuteurSonnichsen, G V; King, T
SourceProceedings of the 21st International Conference on Port and Ocean Engineering under Arctic Conditions; 2011 p. 1-10
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110137
RéunionPort and Offshore Engineering under Arctic Conditions (POAC) Conference; Montreal; CA; juillet 10-14, 2011
Documentlivre
Lang.anglais
Mediapapier
ProvinceRégion extracotière de l'est
Lat/Long OENS-49.0000 -48.0000 47.0000 46.2500
Sujetsbathymétrie; topographie du fond océanique; topographie du fond océanique; érosions par la glace; affouillement; marques d'affouillement; sonar latéral; techniques de cartographie; océanographie; levés océanographiques; géologie marine; géophysique
Illustrationslocation maps; tables; graphs; images
ProgrammeGéoscience de la côte Est, Géoscience en mer
Résumé(disponible en anglais seulement)
In June of 2004, a multibeam sonar survey was conducted on northeast Grand Bank over a previously established repetitive mapping site to identify new seabed scours and improve the scour rate estimate for the region. Post-survey analysis of the resulting multibeam data identified one scour event classified as new with a high degree of certainty, and nine other scour events that may be new, but having a lower degree of confidence. Uncertainty in the identification of new scours was primarily due to limitations in the quality of the sidescan data collected during earlier baseline surveys. This paper describes the scour dataset collected during the survey, including distributions of relevant scour metrics (i.e. width, depth), and the procedure used to evaluate the repetitive mapping data and resulting distribution of possible scour formation rates.
GEOSCAN ID289108