Propagation mechanisms of incident tsunami wave in Jiangsu coastal area, caused by eastern Japan earthquake on March 11, 2011

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• 作者：Chun-guang Yuan 袁春光 ; Yi-gang Wang 王义刚 ; Hui-ming Huang 黄惠明…
• 关键词：Jiangsu coastal area ; tsunami wave ; the maximum wave height ; occurrence position ; wave train ; causes analysis
• 刊名：China Ocean Engineering
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：30
• 期：1
• 页码：123-136
• 全文大小：901 KB
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• 作者单位：Chun-guang Yuan 袁春光 (1) (2)
  Yi-gang Wang 王义刚 (1) (2)
  Hui-ming Huang 黄惠明 (1) (2)
  Cheng Chen 陈 橙 (1) (2)
  Da-ke Chen 陈大可 (1) (2)
  
  1. Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University, Nanjing, 210098, China
  2. College of Harbour, Coastal and Coastal Engineering, Hohai University, Nanjing, 210098, China
  
• 刊物类别：Engineering
• 刊物主题：Oceanography
  Chinese Library of Science
  Offshore Engineering
  Geoengineering, Foundations, Hydraulics
  
• 出版者：Chinese Ocean Engineering Society, co-published with Springer

文摘

At 13:46 on March 11, 2011 (Beijing time), an earthquake of Mw=9.0 occurred in Japan. By comparing the tsunami data from Guanhekou marine station with other tsunami wave observation gathered from southeast coastal area of China, it was evident that, only in Guanhekou, the position of the maximum wave height appeared in the middle part rather than in the front of the tsunami wave train. A numerical model of tsunami propagation based on 2-D nonlinear shallow water equations was built to study the impact range and main causes of the special tsunami waveform discovered in Jiangsu coastal area. The results showed that nearly three-quarters of the Jiangsu coastal area, mainly comprised the part north of the radial sand ridges, reached its maximum tsunami wave height in the middle part of the wave train. The main cause of the special waveform was the special underwater topography condition of the Yellow Sea and the East China Sea area, which influenced the tsunami propagation and waveform significantly. Although land boundary reflection brought an effect on the position of the maximum wave height to a certain extent, as the limits of the incident waveform and distances between the observation points and shore, it was not the dominant influence factor of the special waveform. Coriolis force’s impact on the tsunami waves was so weak that it was not the main cause for the special phenomenon in Jiangsu coastal area. The study reminds us that the most destructive wave might not appear in the first one in tsunami wave train. Key words Jiangsu coastal area tsunami wave the maximum wave height occurrence position wave train causes analysis