난카이 트러프 지진해일의 한반도 남해안 영향 분석 = Analysis of the impact of the Nankai Trough tsunami on the southern coast of Korea

다국어 초록 (Multilingual Abstract)

This study analyzed the impact of a Nankai Trough tsunami on the southern coast of the Korean Peninsula through a numerical simulation of the propagation of a maximum-scale (Mw 9.0-class) earthquake-tsunami. For this analysis, the study utilized 11 tsunami scenarios presented by the Cabinet Office of Japan and a numerical model based on Shallow Water Equations. The Nankai Trough tsunami is largely shielded by Japan's Kyushu Island, but it was confirmed that refracted and diffracted waves reach the southern coast approximately 200-250 minutes after the earthquake occurs. The maximum tsunami height reached up to 0.6m in certain areas where energy is topographically focused, such as Hwasun Port on the south side of Jeju. The tsunami-induced current velocity tended to increase in narrow channels between islands, reaching a maximum of about 0.4 m/s. It was confirmed that the impact of the Nankai Trough tsunami persists for over 12 hours after the earthquake. Moreover, it was observed that while the first wave was the highest in terms of tsunami height, the current velocity was stronger in the second or third waves. This suggests the need for response criteria based on current velocity for maritime activities, such as ship navigation and port operations, in addition to the existing disaster response system that is centered on tsunami height.