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http://dx.doi.org/10.7837/kosomes.2012.18.3.199

Damping of Water Waves over Permeable Bed of Finite Depth  

Kim, Gun-Woo (Department of Ocean Civil & Plant Construction Engineering, Mokpo National Maritime University)
Lee, Myung-Eun (Department of Civil and Environmental Engineering, Seoul National University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.18, no.3, 2012 , pp. 199-205 More about this Journal
Abstract
In this study, wave transformation by damping due to the permeable bed of finite depth is investigated. The relationship between wave damping rate and relative water depth are presented. The damping rate is used in the eigenfunction expansion method to calculate the wave dissipation over the permeable bed. For a permeable shoal, the eigenfunction expansion model result is compared with that of the integral equation method to show good agreement. The model is also used to examine the wave reflection over the permeable planar slope of various frequency. It has been found that in general relatively short waves are more influenced by the permeability of the permeable seabed than relatively long waves unless the water depth is so large that the influence of permeable bed on surface water waves disappears.
Keywords
Eigenfunction expansion method; Wave damping; Permeable seabed; Wave scattering; Monochromatic wave;
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