Abstract
Beach and dune changes on the Katano and Shioya coasts in Ishikawa Prefecture were investigated by comparison of aerial photographs and field observation. In this area, sand dune develops along the shoreline and main sediment source is the Daishoji River flowing into the central part of the coastline. The shoreline change shows recession on the west side of the river mouth, whereas the shoreline advances on the east side. The mechanism of shoreline changes was explained by the reasons that the eastward energy flux is bigger than the westward flux on this coast, and the intermittent sediment transport was induced by the eastward transport as an oneway transport by the weir effect of the river mouth jetties.
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