Yoon, J.-S.; Lee, J., and Ha, T., 2019. Development of a numerical algorithm considering tide–tsunami interaction. In: Lee, J.L.; Yoon, J.-S.; Cho, W.C.; Muin, M., and Lee, J. (eds.), The 3rd International Water Safety Symposium. Journal of Coastal Research, Special Issue No. 91, pp. 76-80. Coconut Creek (Florida), ISSN 0749-0208.

The perimeter of the Pacific Ocean Basin, known as the Ring of Fire, has several sources that can produce strong earthquakes of magnitude ≥7.0. The earthquake of magnitude 9.0-9.1, occurred in 2011 off the Pacific coast of Tohoku, produced a devastating tsunami that affected the Pacific Basin. The lead time before the subsequent tsunami of such an earthquake reaches the coastal areas of the Korean peninsula varies. A tsunami from a distant location like Chile or California, USA, will take 12 h or more to reach the Korean peninsula, while that from Japan or the Ryuku Trench will take only 1–4 h. The tide–tsunami interaction may be strengthened significantly in some regions with very strong tides and could be used to predict tsunami hazards in Korea. Therefore, to develop a plan for mitigating tsunami hazards around the Korean peninsula, the tide–tsunami interaction that occurs during the propagation of a tsunami over regions with strong tides and tidal currents should be properly evaluated and its impact on a local community should be considered during numerical simulations. We developed a new numerical algorithm that includes tide–tsunami interactions for the national tsunami forecasting system. Numerical experiments using this tsunami forecasting algorithm were conducted to investigate the impact of tide–tsunami interactions as the tsunami propagates toward coastal areas of the Korean peninsula.