EM 1110-2-1100 (Part II)
30 Apr 02
U
Current speed [length/time]
U
Wind speed at the 10-m elevation above the sea surface [length/time]
&
U(z)
Mass transport velocity (Equation II-1-69) [length/time]
umax
Maximum fluid velocity in the horizontal direction [length/time]
UP
Universal parameter for classification of wave theories
UR
Dimensionless Ursell number (Equation II-1-67)
Uw
Wind speed at 19.5 m above mean sea level (Equation II-1-155) [length/time]
V
Volume of water within the wave above the still-water level per unit crest (Equation
II-1-90) [length3/length of crest]
w
Fluid velocity (water particle velocity) in the z-direction [length/time]
yc
Vertical distance from seabed to the wave crest (Equation II-1-79) [length]
ys
Vertical distance from seabed to the water surface (Equation II-1-77) [length]
yt
Vertical distance from seabed to the wave trough [length]
z
Water depth below the SWL (Figure II-1-1) [length]
II-1-120
Water Wave Mechanics
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