EM 1110-2-1100 (Part II)
30 Apr 02
p(x)
Probability density
P(x)
Probability distribution function - fraction of events that a particular event is not
exceeded (Equation II-1-124)
&
Wave power or average energy flux per unit wave crest width transmitted across a
P
vertical plane perpendicular to the direction of wave advance (Equation II-1-59)
[length-force/time-length]
Atmospheric pressure [force/length2]
pa
p!
Total or absolute subsurface pressure -- includes dynamic, static, and atmospheric
pressures (Equation II-1-39) [force/length2]
Q(x)
Probability of exceedence (Equation II-1-128)
Qp
Spectral peakedness parameter proposed by Goda (1974) (Equation II-1-151)
R
Bernoulli constant (Equation II-1-102)
R
Cross-correlation coefficient - measures the degree of correlation between two
signals (Equation II-1-123)
Rη
Autocorrelation or autocovariance function of the sea state (Equation II-1-121)
RH
Correlation coefficient describing the correlation between wave heights as a
function of and standard deviation σ (Equation II-1-169)
Correlation coefficient of the wave envelope, relating wave height variation
RHH
between successive wave heights (Equation II-1-173)
s
Dimensionless controlling parameter for the angular distribution that determines the
peakedness of the directional spreading
T
Wave period [time]
&
Mean wave period [time]
T
&c
T
Mean crest period [time]
&z
T
Mean zero-upcrossing wave period [time]
Tc
Average wave period between two neighboring wave crests (Equation II-1-116)
[time]
Wave period associated with the largest wave energy [time]
Tp
Tr
Sampling record length [time]
Tr
Total wave record length [time]
Tz
Zero-crossing wave period (Equation II-1-116) [time]
T(max
Most probable maximum wave period (Equation II-1-141) [time]
u
Fluid velocity (water particle velocity) in the x-direction [length/time]
Water Wave Mechanics
II-1-119
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