TY - JOUR
T1 - Understanding the extreme tsunami inundation in Onagawa Town by the 2011 Tohoku Earthquake, Its effects in urban structures and coastal facilities
AU - Adriano, Bruno
AU - Hayashi, Satomi
AU - Gokon, Hideomi
AU - Mas, Erick
AU - Koshimura, Shunichi
N1 - Funding Information:
This research was supported by the International Research Institute of Disaster Science (IRIDeS) grant, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), and the Japan Society for the Promotion of Science (JSPS) under the Project: Fusion of Real-time Simulation and Remote Sensing for Tsunami Damage Estimation to Latin America (JSPS-Grant: P16055).
Publisher Copyright:
© 2016 World Scientific Publishing Company.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - The 2011 Tohoku Tsunami is considered to be one of the most tragic events in Japan's disaster history, and represents an important milestone for the research community regarding the investigation of the characteristics of tsunami inundation. A thorough analysis of tsunami inundation was conducted using numerical modeling, and measurements from a video recorded from the rooftop of a building in Onagawa in Miyagi Prefecture. In this study, we analyze the destruction of buildings using numerical simulations and tsunami fragility functions. Numerical results for the locations at which the tsunami eyewitness video was recorded are compared with measurements. In addition, we considered the effect of the breakwater in Onagawa bay to evaluate its contribution to reducing overland tsunami inundation depths. The results of our simulations show that the maximum inundation depth due to the first incoming wave was over 16 m, and over 500 buildings were washed away with this first wave. This result is consistent with the video data. Further, we found that the breakwater, which was not originally designed against tsunami waves, reduced the maximum tsunami inundation depth at least by 2.0 m in Onagawa town.
AB - The 2011 Tohoku Tsunami is considered to be one of the most tragic events in Japan's disaster history, and represents an important milestone for the research community regarding the investigation of the characteristics of tsunami inundation. A thorough analysis of tsunami inundation was conducted using numerical modeling, and measurements from a video recorded from the rooftop of a building in Onagawa in Miyagi Prefecture. In this study, we analyze the destruction of buildings using numerical simulations and tsunami fragility functions. Numerical results for the locations at which the tsunami eyewitness video was recorded are compared with measurements. In addition, we considered the effect of the breakwater in Onagawa bay to evaluate its contribution to reducing overland tsunami inundation depths. The results of our simulations show that the maximum inundation depth due to the first incoming wave was over 16 m, and over 500 buildings were washed away with this first wave. This result is consistent with the video data. Further, we found that the breakwater, which was not originally designed against tsunami waves, reduced the maximum tsunami inundation depth at least by 2.0 m in Onagawa town.
KW - The 2011 Tohoku Tsunami
KW - tsunami flow depth
KW - washed-away building mapping
UR - http://www.scopus.com/inward/record.url?scp=84992314167&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84992314167&partnerID=8YFLogxK
U2 - 10.1142/S0578563416400131
DO - 10.1142/S0578563416400131
M3 - Review article
AN - SCOPUS:84992314167
SN - 0578-5634
VL - 58
JO - Coastal Engineering in Japan
JF - Coastal Engineering in Japan
IS - 4
M1 - 1640013
ER -