Abstract
On a coast with a predominant longshore sand transport, the content of coarser sand increases upcoast, resulting in the formation of steep foreshore slope, whereas the content of fine sand increases downcoast, because the movement velosity of fine sand is larger than that of coarse sand. This phenomenon is important in considerating beach nourishment using sand with different grain sizes. However, such data have not yet been obtained. In this study, sampling of foreshore materials as well as the measurement of the foreshore slope was carried out at 79 points along the 30-km-long shoreline of northern Kujukuri Beach in 2011. Longshore sorting of sand was analyzed using such data.
