Dune Erosion and Evolution
A coastal sand dune is an effective barrier against the inundation of sea water into the land in occasions of storm waves or tsunamis. In such a coastal dune, part of sand dune may be eroded by the effect of wind, resulting in the formation of a blowout. Once a blowout is formed, the function of the sand dune as a coastal dike will be lost. In this study, the formation of a blowout on the sand dune was investigated by field observations, and a model for predicting the formation of a blowout was developed using a cellular automaton method.