EM 1110-2-1100 (Part II)
30 Apr 02
II-5-9. Definitions of Symbols
P
Vector gradient operator (Equation II-5-11)
α
Inflow angle (tropical storm parameter) [deg]
ζ
Tidal phase lag [deg]
θ
Angle of storm propagation (tropical storm parameter) [deg]
κn
Epoch of constituent n, i.e., phase shift from tide-producing force to high tide from
t0 [deg]
κ!
Modified form of the epoch that automatically accounts for the longitude and time
meridian corrections (Equation II-5-20) [deg]
λ
Mean frequency of observed events per time period used in the Poisson probability
law (Equation II-5-25)
σ
a
Wave amplitude [length]
an
Speed of tide constituent n [degrees/time]
PX
Attractive force of the moon and sun at any point X (Equation II-5-10)
b
C
Wave celerity [length/time]
Universal constant (= 6.67 10-8 cm3/ gm sec2)
f
Gravitational force (Equation II-5-7) [force-length/time2]
Fg
fn
Factor for adjusting mean tidal amplitude Hn values for specific times
g
h
Water depth [length]
H(t)
Height of the tide at any time t (Equation II-5-16) [length]
H0
Mean water level above some defined datum [length]
Hn
Mean amplitude of tidal constituent n [length]
Wave number (= 2π/L = 2π/CT) [length-1]
k
L
Wave length [length]
lB
Length of a basin [length]
M
Mass of the moon
n
Number of nodes along the axis of a basin
N
Number of storm events used in the Poisson probability law (Equation II-5-25)
-O
The subscript 0 denotes deepwater conditions
Water Levels and Long Waves
II-5-69
Previous Page
