D-R-A-F-T
⎞ Cv
⎛ C oV ⎞ ⎛ V s L
⎛ C oV s ⎞
⎟=
⎟=⎜
⎜L H ⎟
⎜
⎜
⎟
⎟ C
⎝ L ⎠ ⎜ VL de H
⎠
⎝ de
⎠
⎝
n
(sand deposition/diffusion). The ratio of sand deposition to diffusion is
Equation 39
⎛ C oDr ⎞ ⎛ VsL
⎞ Cv
⎛ C oV s ⎞
2
⎟=⎜
⎟=
⎜L H ⎟
⎜
⎜
⎟ C Pe
⎟
⎠ ⎜ D r L de H
2
⎝ L
⎝
⎠
⎝
⎠
de
n
Sand Erosion
Sand erosion is represented in SED2D as
Equation 40
(C - G p ) V
S = α1C + α 2 = -
Ler D
where:
transport potential from Ackers-White, kg/m3
Gp
=
|V|
=
velocity magnitude, m/s
=
scale length factor erosion entrainment dimensionless
Ler
D
=
water depth, m
The velocity magnitude is
Equation 41
(Vu')2 + (Vv')2
V = u2 + v2 =
= V u'2 +v'2 = VVm '
For this condition, the following scaling factors are used
=
Gp
Co Gp'
D
=
H D'
|V|
=
V Vm'
From the application of these scaling factors we get
Equation 42
Advanced Techniques 47
Users Guide To SED2D-WES
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