EM 1110-2-1100 (Part II)
30 Apr 02
II-6-5. Definitions of Symbols
Stability index of an inlet (Equation II-6-33) [length5/time3]
β
∆
Bay superelevation (Equations II-6-20 and II-6-21) [length]
ε
Fraction of new water entering the bay from the sea each tidal cycle [dimensionless]
ε
Phase lag between sea tide and bay tide [deg]
θ
Angle wave orthogonal makes with current entering an inlet [deg]
Friction factor
ξ
Dimensionless distance offshore parameter
τr
Residence time (Equation II-6-28)
a0
Ocean tide amplitude (one-half the ocean tide range) [length]
Average area over a channel length [length2]
Aavg
ab
Bay tide amplitude (one-half the bay tide range) [length]
Surface area of a bay or basin [length2]
Ab
Critical cross-sectional area [length2]
ac
Channel cross-sectional flow area of an inlet [length2]
Ac
aE
Cross-sectional area of an inlet at the minimum inlet width [length2]
Amw
B
Channel width between jetties [length]
C
Potential shoaling factor (Equation II-6-36)
d
Mean water depth in channel [length]
D
Depth of water at current meter location [length]
d1, d2, d3
Natural depth of ocean bar, depth of navigation channel, and water depth where
seaward tip of ocean bar meets offshore sea bottom [length]
Average bay depth [length]
db
DR
Ratio of depth of the channel to the depth at which the seaward slope of the ocean
bar meets the sea bottom (Equation II-6-40)
Channel depth [length]
dT
E∆T
Difference between the mean ebb tide flow energy flux across the ocean bar at its
natural elevation and the mean ebb tide flow energy flux through the cross section
of the excavated ocean bar navigation channel (Equation II-6-38)
II-6-70
Hydrodynamics of Tidal Inlets
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