• Proceedings of the Korea Water Resources Association Conference
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• 1988.07a
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• pp.45-54
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• 1988

현지해안의 해빈변형을 연구하기 위해 해운대 해수욕장에서 파랑과 해빈류를 관측하였으며, 또한 파랑과 흐름의 간섭효과를 고려한 파랑변형 및 해빈류를 수치계산하여 관측결과와 비교하였다. 지형변동은 경험적 고유함수법에 의해 해석했다. 해운대 해수욕장의 해빈변형을 해빈류의 유황과 지형변동의 해석결과에 의해 분석하였다. 남서풍이 탁월할 때는 종단방향의 표사이동에 의해 침식이 일어났으며, 이 때의 표사이동 양상은 입사각이 180。일 때의 해빈류의 유황과 거의 일치하였다. 북동풍이 탁월할 때는 연안방향의 표사이동에 의해 침식이 일어났으며, 이 때의 표사이동 양상은 입사각이 160。일 때의 해빈류의 유황과 거의 일치하였다. 즉, 현지의 해빈변형은 입사파의 특성과 파랑에 의해 일어나는 해빈류에 의해 크게 좌우되는 것으로 나타났다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.11 no.1
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• pp.177-188
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• 1991

The littoral drift in the nearshore zone occurs mainly due to wave action and nearshore currents. Beach topotraphical evolution model presented in this study shows the possibility which can be applied to the prediction of beach deformation over short time interval, associated with the construction of coastal structures. The 3-dimensional beach evolution model, based on Watanabe's equation and Deguchi's flux model, is developed and consists of three submodels of wave transformation, rip-currents, and beach deformation. This model is applied to the several cases with different conditions and compared with the results of Watanabe's numerical model. In addition, the effects of parameters involved are discussed.

• Journal of the Korean Society for Marine Environment & Energy
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• v.7 no.4
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• pp.207-215
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• 2004

Recently, securing a vast land in the land region becomes more difficult and efforts to seek its alternation in the sea area have been increased. As a consequence, the coastal region has been faced to extensive beach erosion problems. In planning offshore structures such as artificial islands, it is necessary to forecast the influence of the structure construction exerting on the beach erosion of the adjacent coast. In the present study, the sediment movement pattern behind offshore structure was examined through a series of three dimensional movable bed experiments, so as to develop the numerical model which forecasts morphological change including beach erosions. The experimental results reveal that the sediment movement patterns of the beach line side and the depth region are separated at a certain boundary line. In details, at the beach side including swash zone the sediment movement becomes dominant, which is governed by a relation between depth contours and incident wave directions, while at the depth region the bed load and suspended load due to the orbit motion of waves are carried by nearshore currents, and both movements are clearly separated at a specified boundary that is related to partial standing wave from the beach. It is expected that these results can be effectively used for verification of a numerical model on morphological change of the coast.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1993.07a
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• pp.42-44
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• 1993

최근, 불규칙파를 조파시킴으로서 발생하는 실험실 스케일의 해빈변형에 대해서 그 정선변화 뿐만아니라 수심변화까지 포함한 수치 simulation모델이 개발되었다. 그러나 현지파랑은 파고, 주기가 불규칙하고, 또한 입사파향도 일정하지 않기때문에, 앞서 논한 예측법에 의해 현지연안에서 발생하는 지형변동을 예측하기 위해서는, 현지파랑중 어떠한 방법으로 대표파고를 선정할 것인가가 큰 문제가 된다. (중략)

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1995.10a
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• pp.39-43
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• 1995

본 연구에서는 퇴적물 이동에 의한 해빈단면 및 해안선의 변화 형태를 파랑모델이나 순환모델의 도움없이 예측하는 간단한 수치 모델을 제시하는 데 그 목적이 있다. 해안선의 변형에 대한 연구는 그동안 많은 진척되었으며 최근 해빈단면의 변형 모델은 물론 3차원적인 복잡한 해저면에도 적응할 수 있는 복합적인 토사이동 모델이 활발히 개발되고 있다(Watanabe 등, 1980； Wang and Miao, 1992； 과학기술처, 1992). (중략)

• Journal of the Korean Society for Marine Environment & Energy
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• v.7 no.4
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• pp.199-206
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• 2004

Construction of a large offshore structure in coastal area may cause serious morphological changes for a wide region ranging from shoreline to offshore behind the structure. Shin et at. [2000] and Shin and Hong [2004] identified the sediment transport patterns behind the large offshore structure through a series of three dimensional movable bed experiments. In present study, a hybrid three dimensional beach deformation model was suggested based on those sediment transport mechanisms revealed by experimental results of the preceding studies. The model was verified by the results of the three dimensional moveable bed experiments and they agreed well not only in reappeared tombolo in shoreline side but also in the erosion and deposition region behind offshore structure. In addition, the model was applied to real beach deformation problem, which was occurred by construction of artificial offshore islands, and it validates the applicability of the model.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1998.09a
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• pp.20-23
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• 1998

현재 해운대 해빈의 사빈이 유실되고 있지만, 이에 대한 연구는 미흡한 상태에 있다. 또한 현장 관측자료의 결핍으로 해운대 해빈 부근의 해수순환패턴과 표사이동을 포함한 해빈변형기작의 규명이 곤란하다. 따라서 해안선 부근의 파랑을 관측하여 실제 현장에서의 연안류 및 연근해 해수순환계의 존재를 밝히고, 그와 관련하여 해안선 부근의 표사이동 양상을 밝히고자 한다. 해운데 해빈에서 파랑의 물입자 운동을 관측하기 위하여 3, 5, 8, 10월에 11, 8, 7, 12개의 정점을 정하여 유속을 측정하였다. (중략)

• Proceedings of the Korea Water Resources Association Conference
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• 2000.05a
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• pp.980-985
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• 2000

• Proceedings of the Korea Water Resources Association Conference
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• 2000.05a
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• pp.992-996
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• 2000

• Journal of the Korean earth science society
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• v.32 no.3
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• pp.265-275
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• 2011

The Hamo and Hyeopjae beaches in the western part of Jeju Island were studied in terms of seasonal variations of surface sediment and beach profile. Seasonal drift direction of the beach sands also was investigated. The Hamo beach of $7.3^{\circ}-10.8^{\circ}$ steep is composed of medium sand containing volcanic clasts and shell fragments. The Hyeopjae beach of $2.8^{\circ}-6.5^{\circ}$ steep is composed of coarse shelly sand. Hamo beach deformation is probably caused by the jetties constructed in the western part of the beach. In the Hyeopjae beach, surface sands were drifted into the dune side by the northwestern stormy wind during winter season.