Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Effects of Coastal Groundwater Level on Beach Deformation

해안지하수위가 해빈변형에 미치는 영향

  • Lee, Woo-Dong (Department of Ocean Civil Engineering, Gyeongsang National University) ;
  • Hur, Dong-Soo (Department of Ocean Civil Engineering, Gyeongsang National University)
  • 이우동 (국립경상대학교 해양토목공학과) ;
  • 허동수 (국립경상대학교 해양토목공학과)
  • Received : 2019.10.04
  • Accepted : 2019.11.27
  • Published : 2019.12.30
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Abstract

In order to understand the characteristics of beach deformation, in this study, numerical simulations were conducted using a 3-D hydro-morphodynamic model (HYMO-WASS-3D) to analyze the characteristics of beach deformation due to the coastal groundwater levels. HYMO-WASS-3D directly analyzed the nonlinear interaction between the hydrodynamic and morphodynamic processes in the coastal area. The simulation results of HYMO-WASS-3D showed good agreement with the experimental results on the changes in the profile of the beach in the surf and swash zones. Then, numerical simulations were conducted to examine the characteristics of beach deformation due to the variation of the level of the coastal groundwater. As a result, the beach profiles were examined in relation to the wave breaking in the surf zone and the wave uprush and backwash in the swash zone due to the differences in the water levels. This paper also discussed the temporal and spatial distributions of the velocities, vorticities, and suspended sediments in the surf and swash zones with various levels of the coastal groundwater.

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References

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