碩士 / 國立成功大學 / 水利及海洋工程學系碩博士班 / 90 / This study is to investigate the reducing effect on the wave run-up over the seawall by a porous apron .The apron is designed to serve two major purposes. One of them is to protect the seabed at the toe of the seawall from scouring. The other is to attenuate the incoming waves. To achieve this, the bottom of the apron is made of a solid plate. And upper part of it must be a porous structure. Three types of porous media have been used as the material for the upper part of the apron. They are referred to as material A, B and C, and their porosities are 0.9, 0.77 and 0.45, respectively. Then experimental tests are conducted using three depths of submergence, four different apron lengths and two different seawall slopes. It is concluded that the apron with larger porosity would raise smaller wave run-up over the seawall. Moreover, as the depth of submergence decreases, the length increases, the wave run-up will be reduced.
| Identifer | oai:union.ndltd.org:TW/090NCKU5083015 |
| Date | January 2002 |
| Creators | Wei-Jei Cheng, 程偉傑 |
| Contributors | S. W. Twu, 涂盛文 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 53 |
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