During the typhoon season, the coastal Taiwan often receives swells follow by wind waves. The routes of typhoon and the geographic effects complicate the wave conditions. This study investigates the growth and decay of waves at the southwest coast of Taiwan due to two different paths of typhoon. Two different methods of wave analysis are applied: The Fast Fourier Transform (FFT), and the Hilbert Huang Transform (HHT). The results show that 1) the FFT analysis is simple and easy to apply. The HHT, however, provides detail information on wave height and period during typhoon passages. The typhoon went through northern Taiwan induced small waves and period. The reason is that the wind is blocked by the Central Ridge of Taiwan. Waves are generated after typhoon center pass the Taiwan Strait. 2) On the other hand, typhoon went though Luzon Strait induced large swells and wind waves. The geographic effect is the major factor of wave height and period generated. The distance to the typhoon center is another factor producing large waves which is related to the degree of gust. 3) The comparison of wind wave and swell show that the sea is dominated by wind waves during the approaching of typhoon, while swells dominate over when typhoon is leaving.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0213107-151226 |
| Date | 13 February 2007 |
| Creators | Hsu, Tang-Chia |
| Contributors | Chung-Pan Lee, Kuang-Lung Fan, Guan-Yu Chen, Yang-Yih Chen, Yu-Huai Wang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0213107-151226 |
| Rights | unrestricted, Copyright information available at source archive |
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