Abstract
The effect of the offshore nourishment using sand with several grain sizes was investigated on south Kujukuri Beach. Beach profiles were first measured along four survey lines of the coast as well as the sampling of sea bottom materials. Based on these field data, beach changes were predicted using the contour-line-change model which considers the sorting effect owing to different grain size. It is concluded that the most appropriate method to recover the foreshore and to prevent further beach erosion is to carry out the beach nourishment using sand with mixed grain sizes at a rate of 2×104m3/yr.
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