Numerical Simulation of Formation of Cuspate Foreland Behind an Offshore Breakwater Built in a lake

Lakeshore changes associated with the extension of an offshore breakwater in a lake were investigated, taking the Torigasaki cuspate foreland located on the south shore of Lake Shinji as an example. After the construction of an offshore breakwater to form a wave-shelter zone, a cuspate foreland was formed with shoreline recession on nearby coasts. The shoreline changes were investigated using aerial photographs, and the beach changes were reproduced using the BG model (a three-dimensional model for predicting beach changes based on Bagnold's concept). The predicted and measured beach changes were in good agreement.