碩士 / 國立臺灣海洋大學 / 海洋環境資訊學系 / 100 / The huge tsunami occurred in Japan on March 11, 2011 (so named as 311). By inspecting the entire process from the warning announcement to disaster response and rescue, their experience is collected and collated for our learning purposes. To accurately decide the arrival time and wave height at Taiwan, the water level data in 15 seconds interval of the 17 tide gauge stations of the ROC Central Weather Bureau were applied. For that, the tide filtering process by modifying the running mean method with a cubic spline function would completely eliminate the misunderstanding of “trough type tsunami” due to “the first fake wave trough”. And then the accurate arrival time, crest and trough of first tsunami wave could be obtained for future numerical modeling. Our results were carefully compared to those from the harmonic and the empirical mode decomposition (EMD) methods. According to visual judgment from the time series of tide data, the method of running mean modified by cubic spline function is highly reliable.
Furthermore, the prevention responses of organs, authorities and units including the Coast Guard, Central Weather Bureau, Port Authority, Fisheries Agency, Nuclear Power Plants and National Taiwan Ocean University were selected for inspection. Although they all reached the demand of fast notification and started the emergency mechanism for prevention measures, they also figured out more to amend their countermeasures or post drill scripts. This thesis finally proposes the author’s views and suggestions to those listed units in order to enhance the practical value of those high quality water level data of the country for such an unattainable tsunami of the century.
| Identifer | oai:union.ndltd.org:TW/100NTOU5282040 |
| Date | January 2012 |
| Creators | Ju-Chieh Yeh, 葉儒杰 |
| Contributors | Jian-Hwa Hu, 胡健驊 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 194 |
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