Abstract
The accident that three children and two adult males who tried to rescue the children died occurred at Jogehama beach in 2014. The beach was known in the around area for the small cusp topography and steep slope. Therefore, the beach was the swimming prohibited area, and they played on the beach when the accident occurred. However, the big wave suddenly run up to the beach, and the children were swept out to sea. Our group reproduced the wave run up condition by the numerical simulation. We used the vertical two dimensional model, CADMAS-SURF2D. In this case, we changed the wave height, the period and the bottom slope. The result was compared with other beaches. According to the results, we considered the safety degree about the wave run up on the beach, and we tried to extract the same beaches that the same phenomenon occurs in Niigata prefecture.
