| Outline of Final Research Achievements |
The sediment cross-shore and vertical movements in the area of the swash zone to the offshore end of the surf zone were investigated using the fluorescent sand in the field experiments and the laboratory experiments. From the observed data of the field experiments, we found that the fluorescent sand that installed in the swash zone and surf zone were drifted toward the trough area. Therefore, it can be considered that the sand movements are separated onshore side and offshore side of the bar, and if the bar does not exist, sand at the offshore side of the bar could move toward the nearshore. However, the fluorescent sand installed at the offshore was not moved to the nearshore. Moreover, we found that the sediment properties have a direct influence on the change of the bed profile. For the mixing depth analysis, based on the laboratory experiments, the spatial distribution of mixing depth was measured and found the correlation between mixing depth and sediment diameter.
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