the resonant peaks decreases as the coastal boundary reflection coefficient decreases.
These reflection coefficient does not affect the frequencies at which the resonant peak
occurs.
Figure 21 shows the effects of friction on the CGWAVE predictions. As the
friction parameter is increased, the solution shows a progression toward the lab data at the
first resonant peak. The peak frequency shows a small shift for the larger values of the
friction parameter. At the second resonant peak the solutions with friction match the
solution without friction, indicating that energy dissipation due to bottom friction is less
important for short period waves than for long period waves.
For this problem, CGWAVE reproduces laboratory data by including the effects of
frictional dissipation and boundary absorption. The CGWAVE results show that harbor
resonance is sensitive to the energy absorbed at the coastal boundaries and to dissipation
by friction. The choice of friction parameter and coastal reflection coefficient does clearly
affect the model estimates in resonance cases.
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