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(3) Solve the salinity transport equation, if needed;
(4) Guess the bed density, etc., and calculate the sediment settling velocity, deposition
rate, and erosion rate;
(5) Solve the sediment transport equation;
(6) Calculate the bed change due to sediment transport;
(7) Calculate the bed consolidation and obtain a new bed density;
(8) Return to step (4) and repeat the iteration until a convergent solution for sediment
transport is obtained;
(9) Adjust the bed topography, and return to step (2) for the next time step.
11.3.3 Examples
Many applications of cohesive sediment transport models can be found in Nicholson
and O'Connor (1986), Li
et al
. (1994), Chen
et al
. (1999), Le Normant (2000), Wu
and Wang (2004c), and so on. As one example, the simulation of cohesive sediment
transport in the Gironde Estuary, France, conducted by Wu and Wang (2004c) using
the depth-averaged 2-D model introduced above is cited here. This estuary is partially
mixed and macrotidal, with a tidal period of 12 hours and 25 minutes and a tidal
amplitude of 1.5 to5matthemouth. The simulation domain was about 80 km
Figure 11.13
Sketch of Gironde Estuary, France.
