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Indexed by:期刊论文

Date of Publication:2011-08-01

Journal:COASTAL ENGINEERING

Included Journals:SCIE、EI

Volume:58

Issue:8

Page Number:761-766

ISSN No.:0378-3839

Key Words:Irregular waves; Obliquely incident; Reflection; Morlet wavelet transform

Abstract:An existing 2D time-domain method for separating irregular incident and reflected waves by wavelet transform [Ma et al., 2010. A new method for separation of 2D incident and reflected waves by the Morlet wavelet transform. Coastal Eng., 57(6):597-603] is extended to account for obliquely incident irregular waves propagating over sloping bottoms. The linear shoaling and refraction coefficients are adopted to determine the amplitude and phase changes of waves. The optimal central frequency of the Morlet wavelet is determined by the minimum Shannon wavelet entropy. Numerical tests show that the present method can accurately separate waves over horizontal depths. For waves at sloping bottoms, however, the separation errors increase as bottom slope increases and are significant for waves with incident angle larger than pi/3. (C) 2011 Elsevier B.V. All rights reserved.