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http://dx.doi.org/10.3741/JKWRA.2006.39.11.961

A Study of Siltation in a Small Harbor  

Yoon, Seong-Jin (Research Center for Marine Environment Development & Technology, Kwangdong University)
Kim, Kyu-Han (Department of Civil and Environmental Engineering, Kwangdong University)
Publication Information
Journal of Korea Water Resources Association / v.39, no.11, 2006 , pp. 961-968 More about this Journal
Abstract
Since a small harbor is often located near surf zone areas which have great influences of sediment transport, there is a great possibility that the sediment will be deposited inside of the harbor. The sediment transport occurring around the harbor entrance can't be explained by the wind wave and wave induced current. In this study, it was investigated the mechanism of the entrainment of sediment into a small harbor with permeable breakwater using hydraulic experiments in 3D wave basin. It is found out that the significant sediment entrainment produced when the mode of oscillation in the harbor became the 1st mode. In the case where the incident wave period was shorter than the period that caused higher mode oscillation in harbor, only a little amount of sediment entrainment took place. The vortex shedding from the top of secondary breakwater played very important roll in the entrainment of sediment into the harbor. It is also found that the small jetty attached at the top of secondary breakwater could effectively prevent the entrainment of sediment into the harbor.
Keywords
Sediment transport; Permeable breakwater; Mode of oscillation; Vortex shedding; Secondary breakwater;
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