EM 1110-2-1100 (Part II)
30 Apr 02
g
G(f,θ)
Dimensionless directional spreading function
H
Wave height [length]
&
H
Mean wave height [length]
H1/3
Significant wave height [length]
H1/n
The average height of the largest 1/n of all waves in a record [length]
Hd
Design wave height [length]
Hj
Ordered individual wave heights in a record (Equation II-1-115) [length]
Hmax
Maximum wave height [length]
Hrms
Root-mean-square of all measured wave heights [length]
Hs
Significant wave height [length]
k
Modulus of the elliptic integrals
k
Number of lags between waves in a sequence in a record (Equation II-1-169)
Wave number (= 2π/L = 2π/CT) [length-1]
k
K(k)
Complete elliptic integral of the first kind
Kz
Pressure response factor (Equation II-1-43) [dimensionless]
L
Wave length [length]
M
Dimensionless parameter which is a function of H/d used in calculating water
particle velocities for a solitary wave (Equations II-1-92 & II-1-93) (Figure II-1-
17).
Moments of the wave spectrum
m0,1,2,4
N
Dimensionless correction factor in determination of η from subsurface pressure
(Equation II-1-46)
N
Dimensionless parameter which is a function of H/d used in calculating water
particle velocities for a solitary wave (Equations II-1-92 & II-1-93) (Figure II-1-
17).
N
Number of waves in a record
Number of crests in the wave record
Nc
Nz
Number of zero-upcrossings in the wave record
-O
The subscript 0 denotes deepwater conditions
Pressure at any distance below the fluid surface [force/length2]
p
P
II-1-118
Water Wave Mechanics
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