EM 1110-2-1100 (Part III)
30 Apr 02
dC
Offshore closure depth [length]
E
Eb
Wave energy at the breaker line per unit crest width [length-force/length]
erf( )
Error function
erfc( )
Complementary error function
g
H
Wave height in the surf zone [length]
Hb
Wave height at breaking [length]
Hmo
Average wave height [length]
Hsig
Significant wave height [length]
IR
Immersed weight transport rate [force/sec]
K
Empirical proportionality coefficient [dimensionless]
K1, K2
Empirical coefficients, treated as calibration parameters, used in the GENESIS
empirical predictive formula for longshore sand transport rate (Equation III-2-42)
Constants [dimensionless]
Ka,b
Dimensional normalizing constant [time3/force]
kq
m
Average bottom slope from the shoreline to the depth of active longshore sand
transport [length-rise/length-run]
In-place sediment porosity (. 0.4) [dimensionless]
n
p(t)
Proportion of fill left within project boundaries at a given time after project
initiation (Equation III-2-32)
Potential longshore sediment transport rate [force/time]
PR
q
Line source or sink of sediment
Potential volumetric longshore transport rate [length3/time]
Q
Local longshore transport per unit width offshore [length3/time/length]
qx(y)
Annual longshore transport to the right (looking seaward) [length3/time]
QR R
Net annual longshore transport [length3/time]
QR NET
Annual longshore transport to the left (looking seaward) [length3/time]
QR L
Gross annual longshore transport [length3/time]
QR GROSS
Volume longshore transport rate [length3/time]
QR
Longshore Sediment Transport
III-2-111
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