Ajigaura Beach is one of the famous bathing beaches in Ibaraki Prefecture. In recent years, severe beach erosion has occurred. Even though beach nourishment has been carried out as a measure against beach erosion, wave run-up damage often occurred in the south part of the beach where the foreshore was narrowed. In this paper, topographic changes of the beach were investigated on the basis of the past aerial photographs and bathymetric survey data, and the numerical simulation using the BG model was carried out to reproduce the measured beach changes. The measured and calculated results were in good agreement.
