| Summary: | 碩士 === 國立成功大學 === 水利及海洋工程學系 === 106 === The storm surge is one of the common natural disaster in Taiwan. In the past, researchers focused on storm surge studies at specific regions or typhoons, a comprehensive analysis around Taiwan coastal ocean is still missing. In order to better understand the characteristic of storm surge around Taiwan, we through the data analysis and numerical simulation. Statistical results show that the average storm surge height in the south is about 80% of the average local tidal range, and the percentage is higher than those in the north and central. Furthermore, we used frequency analysis to calculate the return period on storm surge in each region. The results show that the return periods of the biggest storm surges in the southern regions are generally greater than local design criteria. This paper also discussed the relationship between wind field and storm surge simulation. We used WRF wind field and Holland wind field to simulate two cases which had significant influence in the southwestern part of Taiwan in the past. The results show that the WRF wind field has better performance and the error at storm surge peak value is about 40% and the error of the time of peak appear is about 7.8 hours in southwest of Taiwan. The simulation results were checked with wind data. It was found that there exists a certain error in the wind field. Therefore, we can conclude that the wind field has a significant influence on storm surge simulation.
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