FLOOD06421

• County: Statewide
• Basin: Statewide
• Title: Highways in the River Environment
• Date: 2/1/1990
• Prepared By: Federal Highway Administration
• Floodplain - Doc Type: Educational/Technical/Reference Information

I
W = Buoyant weight of sediment particle J
s
.
W-r = rate of stress work I
/';.WS drop in water surface elevation at a drop structure
=
w = lateral location in a cross-section I
X = Einstein's multiplication factor
X = function of /';./0' in Einstein's method I
Y = pressure correction factor, a function of D 10' in Einstein's method
6' I
y = vertical distance
Yc = critical depth of flow
y = maximum depth of flow I
max
y = normal depth of flow
n
y = total flow depth I
0
Ys = scour depth due to contraction
y' = vertical distance above bed at which the velocity is ~ero
I
y = exponent of the Manning's n relationship
Z = exponent of the Rouse equation
/';.Z = superelevation of flow in bends ..
/';.z = drop in water surface elevation along a channel
z = elevation above arbitrary reference level I
Z.t Z = water surface elevation at inside and outside of bend
1 0
Z = exponent of the friction slope relationship I
GREEK SYMBOLS
energy correction factor I
a =
a' = energy correction factor for unit width I
a coefficient of the downstream decrease in slope
=
f3 = momentum correction factor I
f3 = angle between the particle movement direction and the vertical
f3 = angle of the hydraulic jump in bends I
1
f3' = momentum correction factor for a unit width
f3 = coefficient of the downstream decrease in sediment size I
xxxvi ..
I