Reproduction and Long-term Prediction of Topographic Changes of Northern Kujukuri Beach (Iioka - Katakai Fishing Ports)

Abstract

On northern Kujukuri Beach extending between Iioka and Katakai fishing ports, beach has been eroded due to the decrease in sediment supply from Byobugaura sea cliff, which was triggered by the installation of concrete blocks along the sea cliff as a measure against cliff erosion by the 1970s. These beach changes were reproduced using the BG model (a three-dimensional model for predicting beach changes based on Bagnold's concept) proposed by Serizawa et al. (2006). Also future beach changes were predicted using the same model. It was concluded that some measures are required to preserve sandy beach of Kujukuri Beach.