On the basis of cross-shore sand transport under the action of long period waves and standing waves reflecting from the seabed slope given by Bowen (1980) and Katoh (1984), a model for predicting the development of multi-bar system was proposed by applying the contour-line-change model. The increase in the intervals between the bars and the decay of the relative height of bars in the cross-shore direction were predicted well. The possibility of the recovery of the multi-bar system by beach nourishment using fine sand is also shown.
