4:15 PM - 4:30 PM
[HDS10-27] Introduction of A Tsunami Source Estimation Database Based on Tsunami Deposits
Keywords:historical tsunami, Japan trench, sediment transport simulation, multiple tsunami scenarios
Even if a tsunami deposit is identified in an area, there are many potential tsunami sources that could have formed the tsunami deposits. However, identifying tsunami deposits in other areas caused by the same event helps reduce the list of potential sources. A tsunami sediment transport simulation (Takahashi et al., 2000, 2010) was carried out with multiple tsunami scenarios along the Japan Trench (NIED, 2015), and the distributions of deposition and erosion were estimated along the Pacific coast of Tohoku District. The data on tsunami sources and deposits were stored in the database, and a function to search the related tsunami sources from the tsunami deposits 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.