FN Archimer Export Format
PT J
TI Modelling the effects of Zostera noltei meadows on sediment dynamics: application to the Arcachon lagoon
BT 
AF KOMBIADOU, Katerini
   GANTHY, Florian
   VERNEY, Romaric
   PLUS, Martin
   SOTTOLICHIO, Aldo
AS 1:1,2;2:1,2;3:1;4:2;5:3;
FF 1:PDG-ODE-DYNECO-PHYSED;2:PDG-ODE-LITTORAL-LERAR;3:PDG-ODE-DYNECO-PHYSED;4:PDG-ODE-DYNECO-PELAGOS;5:;
C1 IFREMER, DYNECO PHYSED, F-29280 Plouzane, France.
   IFREMER, LER AR, F-33120 Quai Commandant Silhouet, Arcachon, France.
   Univ Bordeaux, CNRS, UMR EPOC 5805, F-33615 Pessac, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
SI BREST
   ARCACHON
   AUTRE
SE PDG-ODE-DYNECO-PHYSED
   PDG-ODE-LITTORAL-LERAR
   PDG-ODE-DYNECO-PELAGOS
   AUTRE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.943
TC 23
UR https://archimer.ifremer.fr/doc/00216/32733/105452.pdf
LA English
DT Article
DE ;Zostera noltei;Sedimentation;Erosion;Arcachon lagoon;Intertidal mudflats;Flume measurements
AB A three-dimensional model has been modified to describe the complex interactions between hydrodynamics, sediment dynamics and biological parameters in the presence of Zostera noltei. The model treats seagrass leafs as flexible blades that bend under hydrodynamic forcing and alter the local momentum and turbulence fluxes and, therefore, the benthic shear conditions; these changes cause related changes to the mass balance at the boundary of the bed, in turn affecting the suspended matter in the column and ultimately primary productivity and the growth of the dwarf-grass. Modelling parameters related to the impact of Z. noltei to the local flow and to erosion and deposition rates were calibrated using flume experimental measurements; results from the calibration of the model are presented and discussed. The coupled model is applied in the Arcachon Bay, an area with high environmental significance and large abundance of dwarf-grass meadows. In the present paper, results from preliminary applications of the model are presented and discussed; the effectiveness of the coupled model is assessed comparing modelling results with available field measurements of suspended sediment concentrations and seagrass growth parameters. The model generally reproduces sediment dynamics and dwarf-grass seasonal growth in the domain efficiently. Investigations regarding the effects of the vegetation to the near-bed hydrodynamics and to the sediment suspension in the domain show that dwarf-grass meadows play an important part to velocity attenuation and to sediment stabilisation, with flow and suspended sediment concentrations damping, compared to an unvegetated state, to reach 35-50 and 65 %, respectively, at peak seagrass growth.
PY 2014
PD OCT
SO Ocean Dynamics
SN 1616-7341
PU Springer Heidelberg
VL 64
IS 10
UT 000342205000009
BP 1499
EP 1516
DI 10.1007/s10236-014-0754-1
ID 32733
ER

EF