碩士 / 國立海洋大學 / 河海工程學系 / 88 / Near shore abnormal water level rise induced by typhoons often makes different degrees of coastal disaster. The characteristics of near shore abnormal water level rise were studied in this paper by analyzing data from several tidal stations around Taiwan. The storm surge heights induced by typhoons with different tracks and properties such as low pressure, wind velocity, wind direction, fetch radius and the distance from typhoons’ center to tidal stations, it is expected to provide more reliable evidences for explaining coastal structure damages on the N-E coasts and flooding in the Southwest low-lying coastal regions. Tidal data from 13 tidal stations including Keelung, Kenfang, Suao, Chengkung, Fukan, Kaoshiung, Chianchuing, Tungshih, Wenkang, Penghu, Hsiuchu, Chuwei, Tanshui, and typhoons causing serious coastal disaster in recently 30 years were selected for analysis. The results show that typhoons of track 1 and track 4 have greater influences on North and Northeast coasts, while typhoons of the track 2 and track 3 have greater influences on East and Southwest coasts. But the tidal data inside ports or harbors seems not sufficient for explaining the causes of the near shore abnormal water level rise in the open sea. To analyze the mechanism of changes during typhoons’ attack, a series of field tidal stations were set up to collect more data for comparisons. It is found that local coastal topography plays an important role in inducing further water level set-ups, especially in the shallow water regions. These results can be useful references for coastal engineers to design most optimum seawalls and breakwaters.
| Identifer | oai:union.ndltd.org:TW/088NTOU0192041 |
| Date | January 2000 |
| Creators | 王茂寅 |
| Contributors | 臧效義 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 83 |
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