抄録
Relation between shoreline and beach profile changes at coasts with dominant longshore sand transport was investigated based on the combination of aerial photographs and field observation. Field observation was carried out at coasts between Kazusaminato and Isone Point in Chiba Prefecture. Beach topography around a groin was classified into four patterns based on the parameters such as the crown height and the landward length of the groin, which control obstruction rate of longshore sand transport of the groin.
