Abstract
The height of a sea wall is usually designed based on water levels of large tsunamis experienced in the past. Behaviors of tsunamis exceeding the design height are examined by means of numerical experiments taking the sea walls at Matsuzaki, Shizuoka prefecture and at Taro, Iwate prefecture. In the case of Matsuzaki, the inundated area reduces to 70 percents of the original one by the presence of the wall although the invasion of tsunami through the river mouth, where no water gate is constructed, is noticeable. In the case of Taro, the sea wall height is designed at 10 meters that equals the height of the 1933 Sanriku tsunami. According to our experiment, however, if a tsunami has the same height as that of the 1933 tsunami, the water level close to the wall front becomes higher than the height of the sea wall. In this case, the water level at some places in the town becomes so high as to give rise to human and material damage in spite of the construction of the sea wall. It is recommended, therefore, that local inhabitants take refuge onto hilltop, unless a small height is predicted by the tsunami warning.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
