Abstract
It is important to establish a method to analyze the behavior of tsunami runup in river, because the effect of tsunamishould be considered in the examination on earthquake-resistant performance of river structure. Thus, the numericalsimulations of 1983 event in the Yoneshiro River were conducted using both dispersive and non-dispersive nonlinearlong wave equations. The simulation with previous one reproduced an undular bore which was observed in 1983.However, both of them provided the similar maximum tsunami heights in the river, and the computed heights agreedwith the measured heights well.
