불투수성 급경사면 위의 파랑상호작용에 관한 수치모델 및 실험
Measurement and Numerical Model for Wave Interation on Impermeable Steep Slopes
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The planning and design of coastal structures against wave attack is required to accurately predict wave transformation, wave run-up, and fluid particlevelocities on a slope. On the other hand, in the swash and surf zones of a natural beach, where coastal erosion and accretion occur at the land-sea boundary, hydrodynamic analysis is essential. In this study, a RBREAK2 numerical model was created based onthe nonlinear shallow water equation and laboratory measurements were carried out in terms of the free surface elevations and velocities for the cases of regular and irregular waves on 1 : 10 and 1 : 5 impermeable slopes. The data were used to evaluate the applicability and limitations of the RBREAK2 numerical model. The numerical model could predict the cross-shore variation of the wave profile reasonably well, but showed more accurate results for slopes that were steeper than 1 : 10. Except near the wave crest, the computed depth averaged velocities could represent the measured profile below the trough level fairly well.
Abstract
The planning and design of coastal structures against wave attack is required to accurately predict wave transformation, wave run-up, and fluid particlevelocities on a slope. On the other hand, in the swash and surf zones of a natural beach, where coastal erosion and accretion occur at the land-sea boundary, hydrodynamic analysis is essential. In this study, a RBREAK2 numerical model was created based onthe nonlinear shallow water equation and laboratory measurements were carried out in terms of the free surface elevations and velocities for the cases of regular and irregular waves on 1 : 10 and 1 : 5 impermeable slopes. The data were used to evaluate the applicability and limitations of the RBREAK2 numerical model. The numerical model could predict the cross-shore variation of the wave profile reasonably well, but showed more accurate results for slopes that were steeper than 1 : 10. Except near the wave crest, the computed depth averaged velocities could represent the measured profile below the trough level fairly well.
참고문헌 (10)
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- 김인철, "투수성 사면에서의 파의 처오름 및 반사에 관한 수치적 해석", 대한토목학회지, 20(5-B), pp.755~763 (2000)
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