Development of Hazard Map in Waterfront Area by Ship Drifting and Grounding Model in Tsunami

Abstract

Not only hydrodynamic forces of tsunami current cause serious damage, but also driftage by tsunami may cause additional damage in a port and harbor area. Especially, in the 2004 Indian Ocean Tsunami, many stranded ships were observed. Therefore, when considering disaster prevention, the identification of expansion mechanisms of tsunami damage caused by drifted ships is very important. This study aims to develop a practical model to analyze the ship drifting and grounding motion by tsunami current. The simulated ship locus was consistent with the evidenced ship locus. And, as a hazard map, the potential damage due to ship drifting was evaluated by incorporating the possibility of collision with drifted ship.