FN Archimer Export Format
PT J
TI Numerical modeling of bottom trawling-induced sediment transport and accumulation in La Fonera submarine canyon, northwestern Mediterranean Sea
BT 
AF PAYO-PAYO, Marta
   SILVA JACINTO, Ricardo
   LASTRAS, G.
   RABINEAU, Marina
   PUIG, P.
   MARTIN, J.
   CANALS, M.
   SULTAN, Nabil
AS 1:1,2;2:1;3:3;4:2;5:4;6:5;7:3;8:1;
FF 1:PDG-REM-GM-LGS;2:PDG-REM-GM-LGS;3:;4:;5:;6:;7:;8:PDG-REM-GM;
C1 IFREMER, Geosci Marines EDROME, Ctr Brest, BP70,CS10070, F-29280 Plouzane, France.
   Univ Brest, IUEM, UMR CNRS 6538, Domaines Ocean, Pl Nicolas Copernic, F-29280 Plouzane, France.
   Univ Barcelona, Dept Dinam Terra & Oceans, CRG Marine Geosci, E-08028 Barcelona, Spain.
   CSIC, Inst Marine Sci, E-08003 Barcelona, Spain.
   CADIC CONICET, Ctr Austral Invest Cient, Bernardo Houssay 200,V9410CAB Ushuaia, Tierra Del Fuego, Argentina.
C2 IFREMER, FRANCE
   UBO, FRANCE
   UNIV BARCELONA, SPAIN
   CSIC, SPAIN
   CONICET, ARGENTINA
SI BREST
SE PDG-REM-GM-LGS
   PDG-REM-GM
UM LGO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 2.364
TC 13
UR https://archimer.ifremer.fr/doc/00374/48549/48862.pdf
LA English
DT Article
DE ;Bottom trawling;Inverse model;Modeling;Sediment transport;Submarine canyon;Turbidity currents
AB Bottom trawling leads to recurrent sediment resuspension events over fishing grounds. Recent studies have shown how bottom trawling can drive seascape reshaping at large spatial scales and enhance sediment transport in submarine canyons, which subsequently impacts deep-sea ecosystems. Present knowledge on the transfer and accumulation of sediment flows triggered by bottom trawling is based on localized and infrequent measurements whilst a more complete picture of the process is needed. The present work focuses on the modeling of sediment transport and accumulation resulting from trawling activities in La Fonera submarine canyon, northwestern Mediterranean Sea, thus contributing to an improved assessment of trawling impacts. Based on mooring data within a canyon gully, we use an inverse model to retrieve the unknown time series of resuspension due to trawling over the fishing grounds. This resuspension is later used as forcing for the direct problem: we simulate trawling-induced flows through the canyon and provide a 3D visualization of potential trawling impacts on sediment dynamics, including the identification of the propagation patterns of sediments resuspended by trawling. Flows coming from shallower fishing grounds are funneled through canyon flank gullies towards the canyon axis, with part of the resuspended sediment reaching the continental rise out of the canyon across the open continental slope. Trawling-induced sediment flows promote sediment accumulation beyond the canyon mouth. Given the wide geographical distribution of bottom trawling, our results have far-reaching implications that go much beyond La Fonera submarine canyon. Our study represents a starting point for the assessment of the sedimentary impact of bottom trawling in deep continental margins.
PY 2017
PD APR
SO Marine Geology
SN 0025-3227
PU Elsevier Science Bv
VL 386
UT 000403512800009
BP 107
EP 125
DI 10.1016/j.margeo.2017.02.015
ID 48549
ER

EF