文章基本信息

标题：FLOW AND POTENTIAL FORCE DUE TO RUNUP TSUNAMI AROUND A COASTAL FOREST WITH A GAP – EXPERIMENTS AND NUMERICAL SIMULATIONS
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作者：Nguyen Ba Thuy ; Katsutoshi Tanimoto ; Norio Tanaka 等
期刊名称：Science of Tsunami Hazards
印刷版ISSN：8755-6839
出版年度：2010
卷号：29
期号：2
页码：43-69
出版社：Tsunami Society International
摘要：In the present study, laboratory experiments were conducted to validate the applicability of numerical model based on two-dimensional nonlinear long-wave equationsincludingdrag resistance of trees and turbulence induced shear forces to tsunami flow around a simplified forestwith a gapin a wave channel. It was confirmed that the water surface elevation and flow velocity by the numerical simulationsagreewell with the experimental resultsfor various forest conditions of width and tree density.Then the numerical model was applied to a prototype scale condition of a coastal forest of Pandanusodoratissimuswith a gapto investigate the effects of forest conditions (width and tree density) and incident tsunami conditions(period and height) on a potential tsunami force. The potential tsunami force at the gap exitis greatly enhanced and the maximum in the spatial distribution around and inside the forest. The potential tsunami forces at four representative points at front and back of forest including the center of gap exit were analyzed for various conditions and formulated as function of forest and tsunami conditions in the non-dimensional form. The potential tsunami forces calculated by the curve-fit formula agree well with the simulated potential tsunami forces within ±10% error.
关键词：Runup tsunami; Coastal forest; Gap; ;P;andanus;odoratissimus; Tsunami force