抄録
The single space beach change around breakwaters in the new port of Ishikari Bay is described using the beach profiles of field surveying.
The following properties was made clear after examining the results of field surveying
(1) the shoreline and the equilibrium point of beach profile are relating to the grain size of beach sands,
(2) the trough depth is proportional to the bar depth and they are relating to the steepness of wave breaker,
(3) the changes of shoreline is effected by the wave reflection, and is related by the site of trough and bar.
