EM 1110-2-1100 (Part II)
30 Apr 02
H
Standing wave height [length]
Hd
Diffracted wave height at a point in the lee of a breakwater [length]
Hi
Incident wave height [length]
Hr
Reflected wave height [length]
Ht
Transmitted wave height [length]
Ir
Surf similarity number or Iribarren number (Equation II-7-6) [dimensionless]
kn
Individual stiffness of a mooring line (Equation II-7-29) [force/length]
ktot
Effective spring constant (Equation II-7-28) [force/length]
K!
Diffraction coefficient [dimensionless]
K!e
Effective diffraction coefficient (Equation II-7-1) [dimensionless]
L
Wave length [length]
RB
Basin length along the axis B [length]
Rc
Channel length [length]
R!c
Additional length to account for mass outside each end of the channel [length]
ln
Length of a mooring line [length]
Lwl
Waterline length of a vessel [length]
m
Mass of a vessel [force]
M0
Zero moment of the spectrum
ma
Mass of a vessel due to inertial effects of the water entrained with the vessel [force]
mv
Virtual mass of a vessel (Equation II-7-27) [force]
N
Water surface amplitude (Equation II-7-7) [length]
-O
The subscript 0 denotes deepwater conditions
r
Radial distance from the breakwater tip to the point where the diffraction
coefficient (K!) is to be determined (Figure II-7-2) [length]
R
Wave runup above the mean water level [length]
Rn
Reynolds number
S
Vessel blockage ratio [dimensionless]
Wetted surface area of a vessel [length2]
S
Smax
Directional concentration parameter characterizing the directional spread of the
wave spectrum [dimensionless]
Harbor Hydrodynamics
II-7-89
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