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- W2223338119 abstract "The wave-induced orbital velocity is an essential parameter in quantifying wave kinematics for structure design purposes and modelling sediment transport in coastal regions, ports and estuaries. The statistical distribution of wave orbital velocity is often assumed to be the same as that of wave height and described by the Rayleigh distribution, which may be valid for narrow-banded wave spectra where the distribution of wave period obeys a Gaussian distribution. However, this assumption is not applicable where the wave energy is spread over a broader frequency range due to the asymmetry in the distribution of wave period. The statistical distributions of axial (component along the major axis of the velocity ellipse) and total velocity are quantitatively determined from field measurements recorded at approximately 10 m below mean sea level at a sampling rate of 2 Hz in a unique deep water open ocean location offshore the west coast of the New Zealand's North Island, allowing pure linear wave kinematics to be investigated. The statistical distribution of wave orbital velocities is shown to be well represented by the Weibull distribution, consistent with previous studies. However, large differences of the Weibull shape parameters between the axial and total orbital velocity distributions are noted. Furthermore, the shape parameter of the fitted Weibull distribution for the total orbital velocity is shown to be correlated to the surface wave spectral width parameter. This paper provides a simple practical method to improve the estimation of the statistical distribution of wave orbital velocity at any depth from the significant height, mean period and spectral width parameter of surface wave, with a view to increasing the accuracy of maximum orbital velocity predictions. The main advantage of this technique is that the spectral width is taken into account, and therefore is applicable for any wave field." @default.
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- W2223338119 date "2013-01-01" @default.
- W2223338119 modified "2023-09-27" @default.
- W2223338119 title "A note on the statistical distribution of wave-induced orbital velocities" @default.
- W2223338119 hasPublicationYear "2013" @default.
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