270
CHAPTER 6. SEDIMENT TRANSPORT MODELS
6.3.7 Bedload Models: Summary and Discussion
The scaling relationships given by Kamphuis (1974, 1975) and presented in
the previous sections are aimed primarily at modeling coastal sedimentation problems where the dominant mode of sediment movement is bedload
transport. These derived scaling relationships are summarized in Tables 6.3
and 6.4.
Table 6.3: Scaling Laws for Bedload-Dominated Sediment Transport
Model
NR,
N F,
Np./p
Nx/d
Nd
BM
1
1
1
1
LWM
1
1
@
sf"
n3 l'"
DFM
1
@
Nl
Nd
*
(i^Ÿ14
\Nd )
SM
\Nt )
1
Nl
Nd
*
1
* Free Choice
@ Determined from
but constrained by 1.05 < psjp < 2.65
Table 6.4: Shear Stress and Velocity Scales for Bedload Models
Model
Nrb
Nu (OM)
Nu (IM)
BM
Nl
y/N,NL
^n„nl (.)
LWM
n['"
n',/2nI/22
N * /27V25/22
_ 2__ _z.----7V1/2
‘ X
DFM
n^n2'4
N',/2 (NlNj)'14
n^n9' *
SM
n'I'n3./' L a
K J
K J
oo|
00
* Only for geometrically undistorted Inshore Best Models
CHAPTER 6. SEDIMENT TRANSPORT MODELS
6.3.7 Bedload Models: Summary and Discussion
The scaling relationships given by Kamphuis (1974, 1975) and presented in
the previous sections are aimed primarily at modeling coastal sedimentation problems where the dominant mode of sediment movement is bedload
transport. These derived scaling relationships are summarized in Tables 6.3
and 6.4.
Table 6.3: Scaling Laws for Bedload-Dominated Sediment Transport
Model
NR,
N F,
Np./p
Nx/d
Nd
BM
1
1
1
1
LWM
1
1
@
sf"
n3 l'"
DFM
1
@
Nl
Nd
*
(i^Ÿ14
\Nd )
SM
\Nt )
1
Nl
Nd
*
1
* Free Choice
@ Determined from
but constrained by 1.05 < psjp < 2.65
Table 6.4: Shear Stress and Velocity Scales for Bedload Models
Model
Nrb
Nu (OM)
Nu (IM)
BM
Nl
y/N,NL
^n„nl (.)
LWM
n['"
n',/2nI/22
N * /27V25/22
_ 2__ _z.----7V1/2
‘ X
DFM
n^n2'4
N',/2 (NlNj)'14
n^n9' *
SM
n'I'n3./' L a
K J
K J
oo|
00
* Only for geometrically undistorted Inshore Best Models