抄録
The relationship among shorelines, sand bars and stable points of the sandy beach on the field survey result around the new port of Ishikari Bay was discussed in this paper. Conclusions are as follows:(1) The volume of erosion is the maximum at the wave steepness H0/L0=0.030-0.035.(2) The on-offshore movement of sand bar is influenced by the position of sand bar crest at the windward of harbor, and the shoreline is moving with the sand bar at the leeward of harbor.(3) The site of the artificial reef is decided by the scale and the position of sand bar.
