Abstract
In the present study, a fully nonlinear Boussinesq equation model, FUNWAVE 2.0, is employed to simulate the propagation of multidirectional irregular waves over a sloping bottom. The influences of both the principal wave direction and the directional spreading of the wave energy on the statistics of extreme waves are examined. Comparisons of the skewness, the kurtosis, and the probability density function of the surface elevation analyzed based on the measurements of wave fields with various principal wave directions and different directional spreading parameters are conducted. The results show that both the principal wave direction and the directional spreading of the wave field have significant influences on the statistical parameters associated with extreme waves at different relative water depths. It is consequently essential to include the effects of the two directional factors in the context of extreme waves to have an accurate estimation of their probability of occurrence in the nearshore region. Furthermore, the effect of the wave nonlinearity of multidirectional wave fields is also revealed by comparing the simulated results with the theoretical predictions based on the linear and seconder-order nonlinear wave theories.
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Funding
This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 42376205 and 51809039) and the Key Research and Development Program of Zhejiang Province (Grant No. 2023C02029).
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Mei, L., Chen, H., Yang, X. et al. Statistical properties of extreme waves in multidirectional wave fields over complex bathymetry. Ocean Dynamics 73, 827–849 (2023). https://doi.org/10.1007/s10236-023-01586-4
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DOI: https://doi.org/10.1007/s10236-023-01586-4