ESTIMATION OF COASTAL PROTECTION FACILITY HEIGHTS ALONG THE JAPANESE COAST CONSIDERING TSUNAMIS

Abstract

 The purpose of this study was to obtain more accurate estimates of the height of coastal protection facilities in order to assess more realistically flood risks along the Japanese coast. This was achieved by evaluating the impact of tsunami height on coastal areas and estimating the height of coastal protection facilities, considering the obtained results. In this study, numerical calculations were conducted for 16 tsunamis in total, resulting in estimates of tsunami height along the Japanese coast. The obtained results were validated with the values in the published reports, confirming that the estimated tsunami heights accurately represent the characteristics of each tsunami. Considering the influence of tsunamis yielded significant improvements in estimating the height of coastal protection facilities, especially on the coast of the Pacific Ocean. A comparison with the previously measured values by other studies showed that the estimated height of coastal protection facilities in the coastal area of Gobo City, Wakayama Prefecture, demonstrated a good agreement compared to the previous research.