2023 Volume 79 Issue 17 Article ID: 23-17130
Damage to aquaculture facilities was observed in Yamada Bay by the Tonga volcanic tsunami in January 2022. Since there have been few cases of damage to aquaculture facilities caused by non-seismic tsunamis, it is important to clarify the factors that cause damage to aquaculture facilities in order to develop prevention of Tsunami . Therefore, numerical tsunami simulations and drift simulations were conducted to clarify the mechanism of damage to aquaculture facilities. The results showed that the dominant factor in the damage to aquaculture facilities was the flow velocity rather than the tsunami water level, which was consistent with previous studies. The damage to aquaculture facilities may have been caused by the repeated pushing and pulling of aquaculture facilities with a period of about 15 minutes and their collision with adjacent aquaculture facilities in the east-west direction. Finally, the total drifting distance at which damage begins to occur was determined by comparing the presence or absence of damage with the total drifting distance. It is now possible to evaluate the risk of damage from perspectives other than flow velocity.
