Measurement and Numerical Model for Wave Interation on Impermeable Steep Slopes

J. Ocean Eng. Technol. 2008;22(5):44-51.

Kim In-Chul,Ahn Ik-Seong

Division of Architecture and Civil Engineering Dongseo University,Hang Do Engineering Co. Ltd

불투수성 급경사면 위의 파랑상호작용에 관한 수치모델 및 실험

김인철,안익성

동서대학교 건축.토목시스템공학부,항도엔지니어링(주)

Keywords: Wave transformation, Fluid particle velocity, Nonlinear shallow water equation, Free surface elevation, Impermeable slope

핵심용어: 파랑변형, 수립자 유속, 비선형 천수방정식, 수면변위, 불투수성 사면

Abstract

The planning and design of coastal structures against wave attack is required to accurately predict wave transformation, wave run-up, and fluid. particlevelocities an a slope. On tire other hand, in tire swash and surf zones of a natural beach, where coastal erosion and accretion occur at tire land-sea boundary, hydrodynamic analysis is essential. In this study, a RBREAK2 numerical model was created based on the nonlinear shallow water equation and laboratory measurements were carried out in terms of tire free surface elevations and velocities for tire cases of regular and irregular waves on 1 : 10 and 1 : 5 impermeable slopes. The data were used to evaluate tire applicability and limitations of tire RBREAK2 numerical model. The numerical mode1 could predict tire cross-shore variation of the wave profile reasonably well, but showed more accurate results for slopes that were steeper than 1 : 10. Except near tire wave crest, tire computed depth averaged velocities could represent tire measured profile below tire trough level fairly well.