碩士 / 國立成功大學 / 水利及海洋工程學系碩博士班 / 97 / In this work we simulate tsunamis generated and evolution process by landslides using multi-layer Boussinesq equations developed by Lynett and Liu (2004). To ensure the ability of modeling landslide-induced tsunamis, the landslide motion and geometry created by Lynett and Liu (2002) are re-established in the present model, and the results show a high agreement with the numerical results by Lynett and Liu (2004).
Based on the formula of landslide motion and geometry by Lynett & Liu (2005), the effects of relevant parameters are discussed. By varying drag coefficient, added-mass coefficient and specific gravity of slides, the time-dependent velocity and acceleration of slides would be changed. Particularly, the slide-induced waves become larger when the variation of velocity becomes larger, the maximum thickness of the slide is thicker, or the slide body is close to the water surface.
The composite slopes are considered for simulating landslide-induced wave propagation including both subaerial and fully submerged landslide. Particularly, the process of waves passing through different slopes and the runup height are discussed in this study. For the cases of submerged landslide, the runup becomes higher as the first slope becomes milder. When landslides stop, the depth of slide body is more than variation of velocity for the runup height. However, there is no significant difference for runup height between the different slope angles when landslide is subaerial.
| Identifer | oai:union.ndltd.org:TW/097NCKU5083047 |
| Date | January 2009 |
| Creators | Mu-Lan Hou, 侯慕藍 |
| Contributors | Shih-Chun Hsiao, 蕭士俊 |
| 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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