A Hybrid Model for Nearshore Nonlinear Wave Evolution
NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
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Field and laboratory data show the presence of equilibrium in the high frequencies of surf zone frequency spectra. In this region, dissipation of high frequency energy equilibrates with nonlinear interactions that transfer energy primarily from low frequencies to high frequencies. The nonlinear interactions that describe near shore wave evolution increase model complexity, which results in an increase in computational expense. To reduce the computational burden of a nonlinear wave model, it is combined with a parameterization for surf zone wave spectra, and different implementations of the parameterization are tested and the results show that the predicted spectra and Hrms compare well with data and the full model nonlinear parameters skewness and asymmetry are not accurately predicted. Several ideas for future improvements are suggested.
- Physical and Dynamic Oceanography