WATER WAVE FLUCTUATIONS INDUCED BY IRREGULAR BATHYMETRY

Lulin Guo, Robert A. Dalrymple

Abstract


Small irregular water depth variations may cause relatively large variations of the wave field, which may affect the results of various water wave models. Statistical properties of depth variation are obtained from real bathymetry and idealized water depths are generated to study this influence on wave fields. An angular spectral model and a parabolic model are examined for their sensitivity to depth variations. It is shown that diffraction and nonlinear effects are dominant to the wave energy scattering. Correlation functions, especially correlation lengths, play an important role in the wave field variation.

Keywords


wave fluctuations; bathymetry; irregular bathymetry

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