Journal of Coastal Disaster Prevention (한국연안방재학회지)

Korean Society of Coastal Disaster Prevention (한국연안방재학회)
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Assessment of Water Piling-up behind a Submerged Breakwater during Storm Events

단기 태·폭풍 기인 잠제 배후의 Piling-up 현상 평가

  • Son, Donghwi (Marine Disaster Research Center, Korea Institute of Ocean Science & Technology) ;
  • Yoo, Jeseon (Marine Disaster Research Center, Korea Institute of Ocean Science & Technology) ;
  • Kim, Mujong (Marine Disaster Research Center, Korea Institute of Ocean Science & Technology)
  • 손동휘 (한국해양과학기술원 해양재난.재해연구센터) ;
  • 유제선 (한국해양과학기술원 해양재난.재해연구센터) ;
  • 김무종 (한국해양과학기술원 해양재난.재해연구센터)
  • Received : 2018.07.04
  • Accepted : 2018.10.19
  • Published : 2018.10.31
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Abstract

It is generally known that submerged breakwaters can reduce the incoming wave energy without disturbing the beach scenery. However, a submerged breakwater is also able to cause a setup of the sea level in the protected area which is also called as water piling-up. Since the piling-up can result in longshore currents, sediment transports, and unexpected beach erosion, understanding about the piling-up process is required prior to designing the nearshore structures. In this study, the water piling-up behind a submerged breakwater is assessed in the time of storm events. For the study area, Anmok beach in Gyeonso-dong, Gangwon-do is selected. 1-year, 5-year, 10-year, and 50-year return-values were derived from Peaks-Over-Threshold(POT) method and those are applied as offshore boundary conditions for the numerical simulation. The numerical results of the piling-up were assessed with regard to the wave steepness and the height of the submerged breakwater. With increase of both significant wave height and the height of the submerged breakwater, the piling-up parameter is also increased which can lead to erosion of dry beach behind the structure.

Keywords

Acknowledgement

Grant : 영상 AI기반 파랑기인 연안재해모델링 플랫폼 개발을 위한 예비연구

Supported by : 한국해양과학기술원

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