Abstract
Formative process of scarp due to waves was investigated by field observation at the Oarai coast in Ibaraki Prefecture. On this coast construction of headlands are under way. Due to the field observation scarp was found on the south side of each headland, whereas on the northern side of each headland berm was formed, inferring that formation of scarp strongly relates to longshore sand movement in a area separated by structures obstructing longshore sand movement. Formation process of scarp is summarized and the difference with the beach changes due to on-offshore sandmovement is clarified.
