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Impact of natural (waves and currents) and anthropogenic (trawl) resuspension on the export of particulate matter to the open ocean Application to the Gulf of Lion (NW Mediterranean) ArchiMer
Ferre, B; De Madron, X; Estournel, C; Ulses, C; Le Corre, Gildas.
Modern sediment deposits on continental margins form a vast reservoir of particulate matter that is regularly affected by resuspension processes. Resuspension by bottom trawling on shelves with strong fishing activity can modify the scale of natural disturbance by waves and currents. Recent field data show that the impact of bottom trawls on fine sediment resuspension per unit surface is comparable with that of the largest storms. We assessed the impact of both natural and anthropogenic processes on the dispersal of riverborne particles and shelf sediments on the Gulf of Lion shelf. We performed realistic numerical simulations of resuspension and transport forced by currents and waves or by a fleet of bottom trawlers. Simulations were conducted for a...
Tipo: Text Palavras-chave: Mediterranean; Trawling; Fisheries; Shelf slope exchanges; Sediment transport; Sediment dynamics.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4682.pdf
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