Abstract
The reliable tsunami inundation estimations require information on paleo-tsunamis. Tsunami deposits contain extensive information on the tsunamis. However, tsunami deposits have been used mainly to indicate tsunami occurrence. In this research, we developed a database that enables an estimate of the tsunami source that formed the tsunami deposits based on field investigations. A tsunami sediment transport simulation was carried out with multiple tsunami scenarios along the Japan Trench, and the distributions of deposition and erosion were estimated along the Pacific coast of Tohoku District. The computed results were stored in the database, and a function to search possible tsunami sources from the tsunami deposits and their distribution was implemented. The database provides a list of tsunami sources that formed multiple tsunami deposits identified in field investigations. Furthermore, it is also possible to sample the potential area in a field investigation to narrow down the list of potential sources.
