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TitreUnderwater Delta Dynamics Laboratory providing tool for understanding sediment dispersal at river mouths
AuteurLintern, D G; Hill, P R
SourceEos, Transactions of the American Geophysical Union vol. 91, no. 38, 2010 p. 333-334
Année2010
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100053
ÉditeurAmerican Geophysical Union
Documentpublication en série
Lang.anglais
Mediapapier; en ligne; numérique
Formatspdf
ProvinceRégion extracotière de l'ouest; Colombie-Britannique
SNRC92G/03
Lat/Long OENS-123.5000 -123.0000 49.2500 49.0000
Sujetsdeltas; dépôt deltaïque; sédiments deltaïques; marée descendante; wadden; deltas de marée; milieux de marée; topographie du fond océanique; levés acoustiques marins; géologie des dépôts meubles/géomorphologie; géologie marine
Illustrationslocation maps; profiles
ProgrammeGéoscience de la gestion des océans, Géoscience en mer
Résumé(disponible en anglais seulement)
Deltas, home to more than 500 million people and the site of vital wetland ecosystems across the world, are of tremendous economic importance to many countries. The physical dynamics at river mouths determines how sediment particles and contaminants are dispersed offshore by mechanisms that include waves, currents, and gravity flows, but how and when particular mechanisms operate are often inferred rather than known. Thus, scientists' understanding of sediment and contaminant dispersal mechanisms is only rudimentary.
The problems lie in the intermittent operation of the different mechanisms, which occur on tidal, seasonal, and interannual time scales, and the difficulty of making long time series measurements at high sampling rates in these challenging oceanographic environments.
One of the main objectives of the Victoria Experimental Network Under the Sea (VENUS) underwater cabled observatory is to address these observational gaps by establishing an Internet-accessible "Delta Dynamics Laboratory" (DDL) on the seafloor close to the mouth of the Fraser River's Main Channel, Vancouver, British Columbia, Canada (Figure 1a). This laboratory, run by the University of Victoria, continuously collects data and transmits them to the surface in near real time.
GEOSCAN ID285448