2023 Volume 79 Issue 18 Article ID: 23-18041
The maximum storm surge is generally estimated using the strongest typhoon among those that have approached and hit to Japan. Although return periods of the central pressure of the strongest typhoon in Tokyo, Ise and Osaka bays are estimated as 500 ~ several thousand years, those of storm surges induced by the typhoon are unknown. This study estimated return periods of the estimated maximum storm surge in Nagoya and Omaezaki which are induced by the strongest typhoon, using hourly data of observed sea surface elevation. Because the observed data include abnormal tides other than storm surge, such abnormal tides were excluded from the observed data. The estimated return periods were about 4,000 years in Nagoya which has frequently experienced severe storm surge, and about 28,000 years in Omaezaki which hasn’t experienced severe storm surge much so far. The return periods depend on characteristics of the sea area other than typhoon’s characteristics.
