부산대학교 도서관

In this study, we simulated a three-dimensional flow for the vertical profile of flow velocity observed at Amitori Bay, Iriomote Island, Okinawa Prefecture, during the arrival of Typhoon No. 1515. In order to improve the reproducibility of the vertical velocity distribution of the observed results, we conducted a sensitivity analysis for the vertical viscosity coefficient and the bottom roughness coefficient of the sea area. As a result, the flow propagating from the surface to the bottom layer was suppressed by reducing the vertical viscosity coefficient. The reproducibility of the observation results was improved by increasing the bottom roughness coefficient to a value larger than that used in normal tsunami and storm surge analysis because of the coral reefs that develop in the sea area. The flow distribution of the simulation results revealed that different flow fields were formed in the surface and bottom layers of Amitori Bay during Typhoon 1515.