EM 1110-2-1100 (Part II)
30 Apr 02
Figure II-6-44.
Examples of channel geographic instability
to maintaining a scour hole if channelization in the shoreward portion of the inlet throat directs ebb currents
toward the scour hole.
(3) Scour along the inside of jetties can occur as the bathymetry of a newly constructed jetty system
adjusts. Little River Inlet (Chasten and Seabergh 1992) had an initial scour hole that was a remnant of the
construction process. After the conclusion of construction, scour increased in this area, but as the inlet
adjusted, velocities in that scour region decreased.
e. Methods to predict channel shoaling.
(1) Introduction. Entrance channel infill rates can be calculated by a variety of methods (U.S. Army
Corps of Engineers 1984). One method is presented to show the parameters involved. A method to determine
entrance channel infill rates is called the "Oregon Inlet Method." It is an analytic/empirical approach
documented in a U.S. Army Engineer District, Wilmington (1980) report concerning the dredging
Hydrodynamics of Tidal Inlets
II-6-53
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