Notations
B width of channel (L)
Ba width of abutment (L)
Cu uniformity coefficient for sediment
(M0L0T0)
ds depth of scour below initial bed level (L)
dse equilibrium scour depth below mean bed level
(L)
(ds )max maximum scour depth (L)
d 15.9 15.9% by weight of sediment is finer than
that indicated (L)
d 50 median size of bed material (L)
d 84.1 84.1% by weight of sediment is finer than
that indicated (L)
F1 Froude number of approach flow
(M0L0T0)
Fd densimetric Froude number
(M0L0T0)
g acceleration due to gravity (LT-2)
hd hydraulic depth (area/top width) (L)
Ks abutment shape factor
(M0L0T0)
La length of abutment (L)
Q discharge (L3T-1)
rc centerline radius of channel (L)
So channel slope
(M0L0T0)
t time (T)
tm maximum experiment time (T)
\(u_{c}^{*}\) critical shear velocity (LT-1)
V mean flow velocity (LT-1)
Vc velocity of approach flow corresponding to
inception of sediment particle motion in approach
(LT-1)
y flow depth (L)
αangle
of bend curvature (°)
µ dynamic viscosity of water
(L2T-1)
ρ mass density of water (ML-3)
ρs sediment density (ML-3)
σg geometric standard deviation of particle size
distribution
(M0L0T0)