Specifications
Select the dune erosion type as ‘Parameterized dune erosion’ to include the effect of dune erosion. Next you have to specify the initial location of the dune (see Data) and dune erosion parameters.
Figure 11.10 Definition sketch for the dune erosion model
The dune erosion parameters are described in Table 11.1 below.
Table 11.1 Dune erosion parameters
|
Parameter
|
Description
|
|
Erosion slope
|
z-level change due to dune foot level retreat
|
|
Dune height
|
dune crest level
|
|
Max. slope
|
maximum slope of shoreface before failure
|
|
Reference depth
|
mean water depth by which data for the dune erosion calculations are derived
|
|
Gamma
|
calibration factor for the estimate of wave run-up
|
|
Cs
|
calibration factor, usually in the order 0.001 to 0.003
|
|
Angle of repose
|
angle of the dune front
|
|
Min. active area
|
minimum area for active dune erosion (DVol/m)
|
|
Max. no. of iterations
|
calculation parameter
|
|
Tolerance
|
calculation parameter
|
|
Relaxation factor
|
calculation parameter
|
