Vulnerability Analyses of Wave Overtopping Inundation by Synthesized Typhoons with Sea-Level Rise

해수면 상승과 빈도 합성태풍이 고려된 월파범람 위험성 분석

  • Kim, HyeonJeong (Department of Ocean Science & Engineering, Kunsan National University) ;
  • Suh, SeungWon (Department of Coastal Construction Engineering, Kunsan National University)
  • 김현정 (군산대학교 대학원 해양산업공학과) ;
  • 서승원 (군산대학교 해양건설공학과)
  • Received : 2019.07.31
  • Accepted : 2019.09.08
  • Published : 2019.10.31


Storm surges caused by a typhoon occur during the summer season, when the sea-level is higher than the annual average due to steric effect. In this study, we analyzed the sea-level pressure and tidal data collected in 1 h intervals at Incheon, Kunsan, Mokpo, Seogwipo stations on the Yellow Sea coast to analyze the summer season storm surge and wave overtopping. According to our analyses, the summer mean sea-level rise on the west and south coasts is approximately 20 cm and 15 to 20 cm higher than the annual mean sea-level rise. Changes in sea-level rise are closely related to changes in seasonal sea-level pressure, within the range of 1.58 to 1.73 cm/hPa. These correlated mechanisms generates a phase difference of one month or more. The 18.6 year long period tidal constituents indicate that in 2090, the amplitude of the $M_2$ basin peaks on the southwest coast. Therefore, there is a need to analyze the target year for global warming and sea-level rise in 2090. Wave overtopping was simulated considering annual mean sea-level rise, summer sea level rise, the combined effect of nodal factor variation, and 100-year frequency storm surge. As a result, flooding by wave overtopping occurs in the area of Suyong Bay, Busan. In 2090, overtopping discharges are more than doubled than those in Marine City by the recent typhoon Chaba. Adequate coastal design is needed to prepare for flood vulnerability.


Supported by : 한국연구재단


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