Abstract
On a coast with the predominance of windblown sand, generally the fences for preventing windblown sand are constructed. The effectiveness of such a measure against windblown sand has been confirmed at many coasts. However, practical numerical models for explaining the deposion process of windblown sand around a fence are limitted, in particular, in the practical applications, which restricts the prediction of the effect of the measures against windblown sand. In this study, field observation on topographic changes around fences for preventing windblown sand were carried out at the Shonan coast, and a model for predicting topographic changes were developed using a cellular automaton method.