GEOSCAN, résultats de la recherche


TitreSeabed and iceberg scour conditions affecting a potential pipeline landfall offshore Labrador
AuteurKing, T; Sonnichsen, G
SourceProceedings of the 16th International Conference on Performance of Ships and Structures in Ice (ICETECH 2010); 2010 p. 1-8
LiensOnline - En ligne
LiensAbstract - Résumé
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100461
Réunion16th International Conference on Performance of Ships and Structures in Ice (ICETECH 2010); Anchorage; US; Septembre 20-23, 2010
Mediapapier; en ligne; numérique
ProvinceRégion extracotière de l'est
Lat/Long OENS-58.5000 -57.5000 55.5000 54.2500
Sujetspipelines; glace; glace marine; icebergs; érosions par la glace; affouillement; bathymétrie; géologie marine; géophysique
Illustrationslocation maps; profiles; plots
ProgrammeLa géoscience pour les développements extracôtiers de la côte est, Géoscience en mer
Résumé(disponible en anglais seulement)
A seabed survey was conducted in 2007 to assess iceberg scour and seabed conditions at Cape Harrison, which was identified in the 1980s as a potential landfall for a pipeline from the Bjarni/North Bjarni sites on Makkovik Bank. Analyses of the data indicate there are bedrock outcrops that may pose a challenge for pipeline routing. Sub-bottom profiles reveal pockets of acoustically transparent, weakly to strongly stratified channel sediments (often >= 20 m thickness) that are interpreted as soft, low shear strength silty mud or muddy sand. Iceberg scour rates were estimated using seabed scour density and the required pipeline cover depth corresponding to a 1,000 year return period for direct iceberg keel/pipeline contact was calculated.