¡@¡@The impacts of global warming and climate change were the important issue in the last few decades. The sea level rising was one of most discussion topics of physical impact which derived from global warming. In this study, about forty year¡¦s sea level records (from Harbor & Marine Technology Center) were used to analysis the long term water level trends at Keelung Harbor, Taichung Harbor and Kaohsiung Harbor in the western Taiwan.
¡@¡@We rearranged the records format, filtered out error data, and then sorted the data by the logged time. Three kinds of analysis method were applied to investigate the trend of water level change. The first one was harmonic analysis which was used to eliminate the effects of astronomical tide. The second method was spectrum analysis and it assisted to obtain the amplitudes and phases of tidal component. Finally, we used the moving average method to smooth data and discussed the tendency of water level change.
¡@¡@The result showed no evidence of sea level rising along the western coast of Taiwan. The average water level raised and declined evenly in the duration of forty years, and the general trends of water level varied near the zero level. The result also showed the variation of water level that affected by the measurement instruments was more over the physical effects.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0901111-173244 |
| Date | 01 September 2011 |
| Creators | Chen, Yu-Shan |
| Contributors | Yang-Yih Chen, Chung-Pan Lee, Jaw-Fang Lee, Yung-Fang Chiu, I-Fan Tseng |
| 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-0901111-173244 |
| Rights | unrestricted, Copyright information available at source archive |
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