Author(s): Zhi Zong; Yigeng Wang; Lizhou
Linked Author(s):
Keywords: W ave spectrum; Rws; Parameter; Spectral SEM i-moment
Abstract: To describe stochastic properties of waves near atolls we arranged in-situ measurements near an atoll in the South China Sea. Analysis of the measured data shows that there exist four basic forms of wave spectra in the area. They are unimodal, bimodal, platykurtic characterized by a wide flat peak and uniform. Basing on the complex forms we introduce Rational function Wace Spectrum (RWS) form. The form can be described by four parameters which all have special meaning. They are A- amplitude parameter, C- frequency parameter, α- moment parameter, γ- self-sim ilarity parameter. And they have a relationship with spectrum moments or sem imoment. By comparing 236 groups of data, we demonstrate that the RWS form can better describe the atoll wave which are characterized by the presence of breaking waves producing high-frequency waves, swells concentrated at low-frequency and storm waves creating complicated spectral form.
Year: 2020