FN Archimer Export Format
PT J
TI High-Resolution Morphobathymetric Analysis and Evolution of Capbreton Submarine Canyon Head (Southeast Bay of Biscay—French Atlantic Coast) over the Last Decade Using Descriptive and Numerical Modeling
BT 
AF MAZIERES, Alais
   GILLET, Herve
   CASTELLE, Bruno
   MULDER, Thierry
   GUYOT, Corentin
   GARLAN, Thierry
   MALLET, Cyril
AS 1:1;2:1;3:1;4:1;5:2;6:3;7:4;
FF 1:;2:;3:;4:;5:PDG-IMN-IDM-ISI;6:;7:;
C1 Univ Bordeaux, UMR EPOC 5805, F-33615 Pessac, France.
   IFREMER, Ctr Brest, Plouzane, France.
   SHOM, F-29200 Brest, France.
   BRGM Aquitaine, Parc Technol Europarc, F-33600 Pessac, France.
C2 UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
   SHOM, FRANCE
   BRGM, FRANCE
SI BREST
   AUTRE
SE PDG-IMN-IDM-ISI
   AUTRE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
   copubli-univ-france
IF 2.71
TC 27
UR https://archimer.ifremer.fr/doc/00180/29118/27524.pdf
LA English
DT Article
CR GOUFHEAD
   ITSAS
   ITSAS II
   ITSAS V
   ITSAS VI
   SEDYMAQ
   SEDYMAQ2
   SEDYMAQ3
BO Haliotis
   Le Suroît
   Thalia
DE ;longshore drift;submarine canyon;Capbreton;hydrodynamic modeling;sediment transport
AB In this study, the Capbreton canyon head, just off the coast, is investigated using high-resolution multibeam bathymetry datasets, sediment samples and numerical modeling. The HR bathymetry analysis reveals a morphological connection between the longshore trough and the head of the canyon. The analysis of recent sediment samples shows a clear correlation between the sediment of the canyon head and that of the nearshore. Hydrodynamic modeling (a coupled wave-flow model) shows that for high-energy waves, the rotational nature of surf-zone circulation reverses and wave-induced currents have the potential to transport large quantities of nearshore sands toward the canyon head. All these arguments support the assumption that the canyon head captures a part of the sand transported by longshore drift. Over the 15 years of observation (1998–2013), time-lapse bathymetry shows that the floor of the canyon head and one lateral gully network experienced significant morphological reworking. In terms of hazards, despite this strong activity, the position of the canyon head and the profile of its longitudinal slope remained stable and appears as a comforting factor. However, the activity of unusual lateral erosions needs to be monitored.
PY 2014
PD MAY
SO Marine Geology
SN 0025-3227
PU Elsevier Science Bv
VL 351
UT 000335633700001
BP 1
EP 12
DI 10.1016/j.margeo2014.03.001
ID 29118
ER

EF