2022 Volume 78 Issue 2 Pages I_871-I_876
Since October 2021, a large amount of pumice drifted to the coasts of Amami and Okinawa, causing serious damage to the fishing and tourism industries. The pumice was generated by the eruption of the Fukutoku-Oka-no-Ba located in the southern part of the Ogasawara Islands, and drifted due to ocean currents and winds. In Japan, located in a volcanic area, pumice disasters may occur in the future, so it is necessary to develop a prediction method of pumice drift. In this study, particle tracking simulations were carried out assuming pumice drift in Okinawa coastal areas. Especially, the reproducibility of pumice berthing and leaving was verified in Oura Bay. Also, the applicability of the simulation as a forecasting tool were examined. As a result, it would be a practical forecasting tool by running a flow simulation of tidal and ocean currents in advance and executing only a particle tracking simulation considering the wind pressure flow.
