Abstract
The Kuji harbor was severely damaged due to tsunami with soliton fission caused by the Great East Japan Earthquake on the 11th March 2011. The characteristics of tsunami with soliton fissions in a harbor are not well known owing to the lack of detail investigations although they were observed in the 1983 Nihonkai-Chubu Earthquake Tsunami and the 2004 Indian Ocean Tsunami.
In this study, the model experiments and numerical simulations with Boussinesq-type wave transformations model are conducted to investigate the characteristics of tsunami with soliton fission in Kuji harbor. The soliton fission criteria are dependent on the period and height of the tsunami body and the local bottom bathymetry, and it is possible to evaluate the propagation of tsunami with soliton fissions by using the numerical simulations.
