한국해양공학회:학술대회논문집 (Proceedings of the Korea Committee for Ocean Resources and Engineering Conference)
- 한국해양공학회 2002년도 춘계학술대회 논문집
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- Pages.257-262
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- 2002
조석(潮汐)의 영향(影響)이 있는 연안(沿岸)해역(海域)에서의 해안과정(海岸過程)의 변화(變化)
The Change of Beach Processes at the Coastal Zone with the Impact of Tide
- Kim, Sang-Ho (Korea Maritime University) ;
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Lee, Joong-Woo
(Korea Maritime University)
- 발행 : 2002.05.17
초록
Numerical model introduced in this study combines wave refraction-diffraction, breaking, bottom friction, lateral mixing, and critical shear stress and three sub-models for simulating waves, currents, and bottom change were briefly discussed. Simulations of beach processes and harbor sedimentation were also described at the coast neighboring Bangpo Harbor, Anmyundo, Chungnam, where the area has suffered from accumulation of drifting sand in a small fishing harbor with a wide tidal range. We also made model test for the case of a narrow tidal range at Nakdong river's estuary area to understand the effect of water level variation on the littoral drift. Simulations are conducted in terms of incident wave direction and tidal level. Characteristics of wave transformation, nearshore current, sediment transport, and bottom change are shown and analyzed. We found from the simulation that the tidal level impact to the sediment transport is very important and we should apply the numerical model with different water level to analyze sediment transport mechanism correctly. Although the model study gave reasonable description of beach processes and harbor sedimentation mechanism, it is necessary to collect lots of field observation data, including waves, tides and bottom materials, etc. for better prediction.
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