碩士 / 國立成功大學 / 水利及海洋工程學系專班 / 95 / This study focuses on the characteristics of both tidal phenomena and typhoon-induced storm surge around Taiwan. This research collected tidal records from 23 tidal stations around Taiwan from 1992 to 2004. The tidal constituents are deduced from the tidal records based on harmonic analysis. Herewith, typhoon-induced storm surge can be unveiled by deducting the predicted tide from the tidal records. Four main tidal constituents were chosen to study the tidal phenomena around Taiwan. The amplitudes of tidal constituent showed that M2 and S2 are much larger in western Taiwan and Kinmen than the north-eastern and south-western regions. K1 and O1 show comparable magnitude for all the stations except Kinmen has higher value on both K1 and O1. The phase lag of the tidal constituent showed more complicated scenarios than amplitude. M2 in western Taiwan stations have different pattern of phase lag shifting than other regions while S2 show similar phase lag for each station but with obvious difference between each station. Both K1 and O1 exhibit similar trend of phase shift, the phase lag changes every four years, but with different pattern of phase shift within each cycle. For the type of tide around Taiwan, in both north-eastern and south-western regions show a complex tide with stronger diurnal component. Hsinchu and Taichung are clean semi-diurnal tide. Others are complex tide with stronger semi-diurnal component.
Typhoon attacks Taiwan more frequently based on the typhoon warning issued by the Central Weather Bureau. We analyze the storm surge around Taiwan during the period of typhoon attack from 1992 to 2004. The regression analysis on storm surge and the distance to typhoon center based on different typhoon routes and strengths help us to construct few empirical formulae which can be very useful in predict storm surge height for coastal warning purposes during typhoon season. Implementation of regression analysis by single station, a geographically consistent region, and regional multivariate, including the moving speed of the approaching typhoon, we conclude that all the three regression approaches can estimate the storm surge induced by median or strong typhoon with satisfactory results. But storm surge induced by light typhoon has more uncertainties relatively. The empirical formulae from single station approach is good for a particular location only while the formulae form regional regression can be applied to larger region. The regional multivariate approach shows the best performance in storm surge prediction.
| Identifer | oai:union.ndltd.org:TW/095NCKU5083030 |
| Date | January 2007 |
| Creators | Chi-min Chiu, 邱啟敏 |
| Contributors | Kuo-Tung Chang, Tai-Wen Hsu, 張國棟, 許泰文 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 110 |
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