Long waves through emergent coastal vegetation

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題名:	Long waves through emergent coastal vegetation
作者:	Mei,CC;Chan,IC;Liu,PLF;Huang,ZH;Zhang,WB
貢獻者:	水文與海洋科學研究所
關鍵詞:	POROUS-MEDIUM;TSUNAMI;HYDRODYNAMICS;PROPAGATION;FOREST;FLOW
日期:	2011
上傳時間:	2012-03-27 17:33:53 (UTC+8)
出版者:	國立中央大學
摘要:	We study the effects of emergent coastal forests on the propagation of long surface waves of small amplitude. The forest is idealized by an array of vertical cylinders. Simple models are employed to represent bed friction and to simulate turbulence generated by flow through the tree trunks. A multi-scale (homogenization) analysis similar to that for seepage flows is carried out to deduce the effective equations on the macro-scale. The effective coefficients are calculated by numerically solving the micro-scale problem in a unit cell surrounding one or several cylinders. Analytical and numerical solutions for wave attenuation on the macro-scale for different bathymetries and coastal forest configurations are presented. For a transient incident wave, analytical results are discussed for the damping of a leading tsunami. For comparison series of laboratory data for periodic and transient incident waves are also presented. Good agreement is found even though some of the measured waves are short or nonlinear.
關聯:	JOURNAL OF FLUID MECHANICS
顯示於類別:	[水文與海洋科學研究所] 期刊論文

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