碩士 / 國立臺灣海洋大學 / 河海工程學系 / 95 / Abstract
In this study the POM model (Princeton Ocean Model) has been applied to evaluate combined sea water levels by typhoon surge and astronomical tide on coastal waters of Danshuei. In numerical simulations, water levels along domain’s boundaries have been specified by a tidal model NAO99b. Meanwhile, wind speed and pressure fields are specified by a Rankin vortex model (RVM). Ten typhoons, from 1994 to 2000, of the 1st, 2nd, or 6th typhoon paths, according to nine-type typhoon paths, were selected for evaluating surge developments during these typhoons.
Comparisons with field measurements from the tidal station of Danshuei have displayed that the maximum surge deviations and their occurrence times agree better for more intense typhoons, especially with tracks of the low-pressure center passing close to Danshuei. For example, the ‘strong’-ranked Typhoon Doug (1994) of the 6th path demonstrates the best simulation performance. In addition, inclusions of simultaneous tidal levels along the boundaries have proved to be able to derive better agreements with field data on peak values and occurrence times. This suggests the importance of the combined effects of meteorological and astronomical tides for numerical simulations on typhoon surges. In the last, evaluations of effects of the sizes of computation domain and grids on the computation accuracy have further illustrated that effects of reduced domain size are less significant than finer grid sizes.
Keywords: POM, typhoon, surge, tide, Danshuei coast
| Identifer | oai:union.ndltd.org:TW/095NTOU5192032 |
| Date | January 2006 |
| Creators | Tao-Lin, 林濤 |
| Contributors | Shiaw-Yih Tzang, 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 | 66 |
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