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原文传递 Attenuation of Nonlinear Waves by Rigid Vegetation: Comparison of Different Wave Theories

题名：	Attenuation of Nonlinear Waves by Rigid Vegetation: Comparison of Different Wave Theories
其他题名：	Suzuki,T.,Zijlema,M.,Burger,B.,Meijer,M.,and Narayan,S.(2012)."Wave dissipation by vegetation with layer schematization in swan."Coastal Eng.,59(1),64–71.
正文语种：	英文
作者：	Ling Zhu
关键词：	Wave attenuation;Vegetation;Energy flux;Energy dissipation;Wave theories;In-canopy velocity
摘要：	This study investigates the performances of theoretical wave attenuation models in predicting vegetation-induced wave decay. The existing theoretical models are all based on linear wave theory, which cannot describe nonlinear waves accurately. This study applies Stokes second-order and cnoidal wave theories to solve the energy balance equation for wave height evolution. Results from a phase-resolving numerical model serve as reference solutions. A total of 30 tests are devised for shallow-intermediate water waves through emergent and submerged vegetation. The differences between theoretical and numerical model results (e H) and between linear and nonlinear-based theoretical model results (∆H) are quantified. The test results show that for wave propagation through emergent vegetation DH is ≤6％ and e H is ≤5％, whereas over submerged vegetation, e H reaches as large as 25％. With a 5％ tolerance of e H, linear-based theoretical models remain valid for emergent cases and submerged cases with a small Ursell number (≤30 in this study). This work has found that the inability of theoretical models to simulate the in-canopy velocity reduction and nonlinear wave-wave triad interactions contributes to the large e H in submerged cases.
出版年：	2017
论文唯一标识：	P-108Y2017V143N05022
英文栏目名称：	TECHNICAL PAPERS
doi：	10.1061/(ASCE)WW.1943-5460.0000415
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
拼音刊名(出版物代码)：	P-108
卷：	143
期：	05
页码：	268-279