2024 Volume 80 Issue 18 Article ID: 24-18008
A sandy beach named Yoshihama area with 850 m length is located northeast of the Yugawara coast in Kanagawa Prefecture. This beach has been used for a bathing beach. In recent years, rapid shoreline recession occurred at the southwest part of this beach and the foundation of the seawall of the Manazuru coastal road running through this area was exposed to waves due to erosion. The shoreline changes in this area were investigated using aerial photographs and satellite images taken until 2022. Due to the analysis, it was found that although the rapid shoreline recession occurred by storm waves associated with T1919 hit this area on October 12, 2019, the sandy beach was recovered under the calm waves after the typhoon. In this study, beach changes of the area were reproduced using the BG model (a model for predicting three-dimensional beach changes based on Bagnold’s concept). The measured beach changes were successfully explained by the numerical results.
