Nearshore Current Pattern and Rip Current Occurrence at Jungmun Beach, Jeju by Numerical Computation
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초록
A nearshore current or a wave-induced current is an important phenomenon in a nearshore zone, which is composed of longshore, cross-shore, and rip currents. The nearshore current is closely related to the occurrence of coastal accidents by beachgoers. A considerable number of coastal accidents by beachgoers involving the rip current have been reported at Jungmun Beach. However, in studies and observations of the nearshore current of Jungmun Beach, understanding of the rip current pattern remains unclear. In this study, a scientific approach is taken to understand the nearshore current and the rip current patterns at Jungmun Beach by numerical computation for year of 2015. From results of numerical computation, the occurrence and spatial characteristics of the rip current, and the similarities between the rip current and incident wave conditions are analyzed. The primary results of this study reveal that the rip currents are frequently generated at Jungmun Beach, especially in the western parts of the beach, and that the rip currents often occur with a wave breaking height of around 0.5 ~ 0.7 m, a wave period of around 6 ~ 8 seconds, and a breaking angle of around 0 ~ 15 degrees.
Abstract
A nearshore current or a wave-induced current is an important phenomenon in a nearshore zone, which is composed of longshore, cross-shore, and rip currents. The nearshore current is closely related to the occurrence of coastal accidents by beachgoers. A considerable number of coastal accidents by beachgoers involving the rip current have been reported at Jungmun Beach. However, in studies and observations of the nearshore current of Jungmun Beach, understanding of the rip current pattern remains unclear. In this study, a scientific approach is taken to understand the nearshore current and the rip current patterns at Jungmun Beach by numerical computation for year of 2015. From results of numerical computation, the occurrence and spatial characteristics of the rip current, and the similarities between the rip current and incident wave conditions are analyzed. The primary results of this study reveal that the rip currents are frequently generated at Jungmun Beach, especially in the western parts of the beach, and that the rip currents often occur with a wave breaking height of around 0.5 ~ 0.7 m, a wave period of around 6 ~ 8 seconds, and a breaking angle of around 0 ~ 15 degrees.
참고문헌 (13)
- An, S. H., "A Study on the morphological characteristics around artificial headlands", Journal of Coastal Research, 32(3), pp.508~518 (2016)
- 최준우, "수치모의를 통한 해운대 이안류의 주요 메커니즘 연구: 파랑의 벌집구조", 대한토목학회 논문집B, 32(5), pp.321~329 (2012), 대한토목학회
- Choi, J. W., "A Rip Current Warning System Based on Real-Time Observations for Haeundae Beach, Korea", Journal of Coastal Research, 72(3rd), pp.56~62 (2014)
- "Jejusori" (2012)[URL]
- Kim, J. J., "Prediction of Wave-induced Current Using Time-Dependent Wave Model", Journal of the Korean Institute of Navigation, 12(2), pp.269~280 (1998)
- Kim, N. H., "Numerical Computation of the Nearshore Current Considering Wave-Current Interactions at Gangjeong Coastal Area, Jeju Island, Korea", Engineering Applications of Computational Fluid Mechanics, 5(3), pp.430~444 (2011)
- REF, "DIF 1 Version 3.0", Kirby, J. T., 2002, pp.166~, Res. NO. CACR-02-02
- Longuet-Higgins, M. S., "Radiation stresses in water waves; a physical discussion, with applications", Deep Sea Research and Oceanographic Abstracts, 11(4), pp.529~562 (1964)
- "comprehensive countermeasures of safe environment of beach" (2015)[URL]
- Wave Analysis for Rip Current Forecasting in Southeast North Carolina, "Reinhart, B. J.", Technical Attachments, National Oceanic and Atmospheric Administration, ~ (2016)
- Quasi-3D Nearshore Circulation Model SHORECIRC Version 2.0, "Svendsen, I. A", Center for Applied Coastal Research University of Delaware, 64~ (2000)
- 윤성범, "관측자료 분석과 수치모의에 의한 해운대 이안류 발생 특성 연구", 대한토목학회 논문집B, 32(4), pp.243~251 (2012), 대한토목학회
- U.S. Army Corps of Engineers, "Coastal Engineering Manual - Part II", 616~ (2008)