Improvement of prediction models of the toe scour of a seawall and the topographical change of a wide coastal area due to tsunami

Abstract

Tsunami causes large-scale erosion and scour, which may result in the destruction of coastal structures, often as a result of tsunami backflow. Considering that much more serious damage will occur after a seawall breaks, it is necessary for the prediction of damage to develop prediction methods of coastal erosion and scour. This paper proposes a numerical model for the topographical change due to tsunami. Moreover, prediction methods on the maximum scour depth due to tsunami backflow and its position in front of the seawall are also proposed. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).