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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