FN Archimer Export Format
PT J
TI Wave- and current-induced bottom shear stress distribution in the Gulf of Lions
BT 
AF DUFOIS, Francois
   GARREAU, Pierre
   LE HIR, Pierre
   FORGET, P
AS 1:1,2,3;2:1;3:1;4:3;
FF 1:PDG-DOP-DCB-DYNECO-PHYSED;2:PDG-DOP-DCB-DYNECO-PHYSED;3:PDG-DOP-DCB-DYNECO-PHYSED;4:;
C1 IFREMER, DYNECO PHYSED, Ctr Brest, F-29280 Plouzane, France.
   Ctr Ifremer, IRSN, LERCM, DEI SESURE, F-83507 La Seyne Sur Mer, France.
   CNRS USTV, UMR 6017, LSEET LEPI, F-83957 La Garde, France.
C2 IFREMER, FRANCE
   IRSN, FRANCE
   CNRS, FRANCE
   UNIV TOULON, FRANCE
SI BREST
SE PDG-DOP-DCB-DYNECO-PHYSED
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.136
TC 40
UR https://archimer.ifremer.fr/doc/2008/publication-6305.pdf
LA English
DT Article
DE ;Gulf of Lions;3D modelling;Bottom shear stress;Sediment transport
AB Simulations of both currents and waves were performed throughout the year 2001 to assess the relative contribution of each to their overall erosive potential on the Gulf of Lions shelf. Statistical analysis of bottom shear stress (BSS) was compared to sediment grain-size distribution on the bottom. The hydrodynamic features of the bottom layer coincide with the distribution of surficial sediments, and three areas with different hydro-sedimentary characteristics were revealed. (i) The sandy inner shelf ( < 30 m) area is a high-energy-wave dominated area but may be subjected to intense current-induced BSS during on-shore winds along the coast and during continental winds mainly in the up-welling cells. (ii) The middle shelf (30-100 m) is a low-energy environment characterised by deposition of cohesive sediments, where the wave effect decreases with depth and current-induced BSS cannot reach the critical value for erosion of fine-grained sediments. (iii) The outer shelf, which has a higher bottom sand fraction than the middle shelf, may be affected by strong south-westward currents generated by on-shore winds, which can have an erosive effect on the fine-grained sediments. Particular attention was paid to features of the current that were found to be predominant on the mid-outer shelf. These currents are strongly dependent on wind direction. (C) 2008 Elsevier Ltd. All rights reserved.
PY 2008
PD AUG
SO Continental Shelf Research
SN 0278-4343
PU Elsevier
VL 28
IS 15
UT 000259917800005
BP 1920
EP 1934
DI 10.1016/j.csr.2008.03.028
ID 6305
ER

EF