Abstract
Sendai Bay area in Miyagi Prefecture has been seriously damaged by the 2011 Tohoku Earthquake Tsunami, which propagated inland up to about 5km in Sendai Plane. Along the Sendai Bay Coast, there are historical canals such as Teizan Canal, Tona Canal and Kitakami Canal connecting the Abukuma River and the Old Kitakami River mouths with a total length of 49km. It is said that the canals had reduction effect of tsunami disaster during the 2011 devastating tsunami. Hence 2-D numerical simulation has been made in this study to evaluate tsunami mitigation effects of Teizan and Kitakami Canals in expectation of their role as a part of multiple defense system in the Sendai Bay area. Results of numerical simulation show their effectiveness with respect to tsunami energy reduction and tsunami arrival time.
