In order to realize the wave climate characteristics around coastal waters of Taiwan effectively, 2 commonly applied numerical wave models are used to simulate the wave climates around Taiwan, i.e. WAM (WAve Model) and SWAN (Simulating Waves Nearshore). Both are so-called the third-generation wave models, developed to compute the spectra of wind-generated waves. They are calibrated to simulate the wave conditions around Taiwan for this study. These two wave models are driven by hourly wind fields obtained from a Non-hydrostatic Forecast System (NFS) of the Central Weather Bureau, and used to hindcast the wave conditions around Taiwan. The simulation results are validated with observations at 5 harbor stations around Taiwan provided by the Harbor and Marine Technology Center (IHMT). Results shown the hindcast obtained by running WAM model is generally in better agreement with obsevations.
Then, the WAM model was used to hindcast the wave conditions around Taiwan from 2005 to 2006 for wave climate analysis. The analysis of these model results are compared with the analysis of the 5 obsevation stations for different periods of the year. It is found that the result of WAM model hindcast could present most of the wave characteristic during the northeast monsoon. Some discrepancies between the hindcast and the observations can be due to the topography sheltering effects at the observational position, which could not resolved by the model grids. Furthermore, the hindcast has been analyzed for estimating the extreme wave conditions using the events simulated for 2005 and 2006. 5, 10, and 50-year return values with extreme value analysis are estimated. It is found that the extreme wave height and in different return frequencies at the North and Northeast parts of Taiwan are larger then those at other parts around Taiwan.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0903107-123528 |
| Date | 03 September 2007 |
| Creators | Chen, Jia-ming |
| Contributors | John Hsu, Jason Yu, Ching-Ho Su, Yueh-Jiuan Hsu |
| 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-0903107-123528 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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