Abstract
The accident that three children and two adult males who tried to rescue the children died occurred at Jogehamain 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. Following the accident, we investigated the causes why this accident occurred. Firstly, we comprehended the wave condition when the accident occurred. Secondary, we conducted field survey to obtain the topography of the field. The geographic data for the numerical simulation was made from the aerial photograph that was taken by Drone. Finally, we comprehended the wave dynamics on the beach by the horizontal two dimensional numerical model and the vertical two dimensional numerical model.
