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原文传递 Vertical Cylinder Density and Toppling Effects on Dune Erosion and Overwash

题名：	Vertical Cylinder Density and Toppling Effects on Dune Erosion and Overwash
其他题名：	Edge,B.L.,et al.(2010)."Immediate impacts of Hurricane Ike on the Texas Coast."Proc.,32nd Conf.on Coastal Engineering,J.M.Smith and P.Lynett,eds.,Vol.5,Curran Associates,Red Hook,NY,3552-3567.
正文语种：	英文
作者：	Berna Ayat
关键词：	Cylinder;Drag force;Dune;Erosion;Sediment transport;Wave overtopping
摘要：	Interactions among waves, sand dunes, and vertical cylinders are investigated in a laboratory experiment. A cross-shore numerical model is expanded to include the drag force acting on cylinders. The hydrodynamic variables modified by the cylinders are used to predict bed load and suspended sand transport rates. The expanded model is compared with five previous tests. The drag coefficient is calibrated to obtain similar agreement for the dunes with and without the cylinders. Four tests were conducted to examine the placement density and toppling of the cylinders. The effectiveness of the cylinders in reducing dune erosion and overwash decreased significantly with the density decrease and cylinder toppling. The reduced effectiveness is reproduced by the expanded model with the calibrated drag coefficient. However, a simple toppling criterion needs to be adjusted for each test for the reproduction of the observed landward progression of cylinder toppling during the dune profile evolution. Field data will be required to improve the model for real woody plants.
出版年：	2015
论文唯一标识：	P-108Y2015V141N01003
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)WW.1943-5460.0000264
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
拼音刊名(出版物代码)：	P-108
卷：	141
期：	01
页码：	2-11