Abstract
In Niigata west coast, integrated shore protection system by large-scale submerged breakwater has been applied. The topography change in the site is characterized by the belt-shaped scour extends along the submerged breakwater and land subsidence. This study intends to the above two typical process. By analyzing sounding survey data behind the submerged breakwater, it is confirmed that the scour depth of the belt-shaped scour relates to the speed of the submerged breakwater extension. Also, by analyzing the cross-shore profile, it is found that the cross-shore profile change which includes the effect of the land subsidence is quite similar to that by sea level rise predicted using Bruun's law.
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