FN Archimer Export Format
PT J
TI Formulating Fine to Medium Sand Erosion for Suspended Sediment Transport Models
BT 
AF DUFOIS, Francois
   LE HIR, Pierre
AS 1:1,2,3;2:1;
FF 1:PDG-ODE-DYNECO-DHYSED;2:PDG-ODE-DYNECO-DHYSED;
C1 IFREMER, DYNECO PHYSED, BP70, F-29280 Plouzane, France.
   Ctr Ifremer, Antenne Radioecol Marine, LERCM, IRSN,PRP ENV,SESURE, F-83507 La Seyne Sur Mer, France.
   CSIRO Oceans & Atmosphere Flagship, Wembley, WA 6913, Australia.
C2 IFREMER, FRANCE
   IRSN, FRANCE
   CSIRO, AUSTRALIA
SI BREST
SE PDG-ODE-DYNECO-DHYSED
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-int-hors-europe
IF 2.744
TC 9
UR https://archimer.ifremer.fr/doc/00276/38763/37304.pdf
LA English
DT Article
DE ;sand;1DV model;erosion rate;suspended sediment transport
AB The capacity of an advection/diffusion model to predict sand transport under varying wave and current conditions is evaluated. The horizontal sand transport rate is computed by vertical integration of the suspended sediment flux. A correction procedure for the near-bed concentration is proposed so that model results are independent of the vertical resolution. The method can thus be implemented in regional models with operational applications. Simulating equilibrium sand transport rates, when erosion and deposition are balanced, requires a new empirical erosion law that involves the non-dimensional excess shear stress and a parameter that depends on the size of the sand grain. Comparison with several datasets and sediment transport formulae demonstrated the model’s capacity to simulate sand transport rates for a large range of current and wave conditions and sand diameters in the range 100–500 μm. Measured transport rates were predicted within a factor two in 67% of cases with current only and in 35% of cases with both waves and current. In comparison with the results obtained by Camenen and Larroudé (2003), who provided the same indicators for several practical transport rate formulations (whose means are respectively 72% and 37%), the proposed approach gives reasonable results. Before fitting a new erosion law to our model, classical erosion rate formulations were tested but led to poor comparisons with expected sediment transport rates. We suggest that classical erosion laws should be used with care in advection/diffusion models similar to ours, and that at least a full validation procedure for transport rates involving a range of sand diameters and hydrodynamic conditions should be carried out
PY 2015
PD SEP
SO Journal Of Marine Science And Engineering
SN 2077-1312
PU Mdpi
VL 3
IS 3
UT 000435681100020
BP 906
EP 934
DI 10.3390/jmse3030906
ID 38763
ER

EF