碩士 / 國立臺灣海洋大學 / 河海工程學系 / 101 / Taiwan is located in the western Pacific subtropical area where typhoons affect coastal areas, causing coastal erosion, coastal habitat damage, threatening human safety, and endangering private property. In these situations, a buffer strip provides sandy beaches with sufficient beach width, to minimize typhoon-incident wave energy and reduce the hazard to coastal areas.
This study was conducted based on near-shore hydrodynamic theory and the coastal changes perspective, and Yan-Liao beach was used as the research example. The influence of previous typhoon waves was examined, using wave run-up empirical formulas to caculate wave run-up height, and a comparison of the actual profile after a typhoon and sandy beach erosion of the SMC simulation profile was analyzed to determine the appropriate wave run-up empirical formulas for Yan-Liao beach. The Student t distribution was used to prove the applicability of the SMC model and wave run-up empirical formulas. Finally, the influence of a typhoon wave condition with a 50-year return period was considered to propose the sandy beach boundary-estimation method as a platform for planning a coastal buffer strip.
For Yan-Liao beach, the results of applying the SMC model and wave run-up empirical formulas show that upon neglecting the effects of the longshore current, the SMC model can effectively simulate the beach-profile changes of typhoon waves. The Holman (1984) run-up empirical formulas also provide a quick and specific method for planning a coastal buffer strip. The calculation of sandy beach erosion during the 50-year return period is safe and economical for planning a coastal buffer strip in practical applications.
| Identifer | oai:union.ndltd.org:TW/101NTOU5192065 |
| Date | January 2013 |
| Creators | Cheng-Yi Lee, 李政毅 |
| Contributors | Sung-Shan Hsiao, Yuan-Jyh Lan, 蕭松山, 藍元志 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 163 |
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