scholarly journals Field Survey of Tsunami trace heights and Characteristics of Tsunami Propagation along the coast of Aomori Prefecture on the 2011 off the Pacific coast of Tohoku Earthquake

2012 ◽  
Vol 68 (2) ◽  
pp. I_1376-I_1380
Author(s):  
Kentaro IMAI ◽  
Kenji Harada ◽  
Daisuke Sugawara
Keyword(s):  
Pacific Coast ◽  
Field Survey ◽  
Tohoku Earthquake ◽  
Tsunami Propagation ◽  
The Pacific ◽  
Aomori Prefecture

Estimation of Tsunami-Inundated Areas in Asahi City, Chiba Prefecture, after the 2011 Tohoku-Oki Earthquake

2013 ◽  
Vol 29 (1_suppl) ◽  
pp. 201-217 ◽  
Author(s):  
Yoshihisa Maruyama ◽  
Ken Kitamura ◽  
Fumio Yamazaki
Keyword(s):  
Satellite Images ◽  
Pacific Coast ◽  
Field Survey ◽  
Source Region ◽  
Tsunami Propagation ◽  
Chiba Prefecture ◽  
The Pacific ◽  
Significant Damage ◽  
Collapsed Buildings ◽  
The Relationship

The 2011 off the Pacific coast of Tohoku-oki earthquake triggered an extremely large tsunami. The authors conducted a field survey in Asahi City, Chiba Prefecture, after the occurrence of the earthquake. Although located farther away from the source region of the earthquake, there was still significant damage in this area. Tsunami-inundated areas in Asahi City were identified from the map developed by disaster relief volunteers and the satellite images captured after the event. Polygons to demonstrate the tsunami-inundated areas were developed in the geographic information system. The authors compared the identified affected areas with the existing tsunami hazard map of Asahi City. The relationship between the tsunami-inundated areas and the locations of seawalls and tide-prevention forests was evaluated. In addition, a numerical simulation of tsunami propagation was performed and the ratio of totally collapsed buildings to the total number of buildings, that is, damage ratio, in terms of the estimated inundation depths was evaluated.

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