한국해안·해양공학회논문집 (Journal of Korean Society of Coastal and Ocean Engineers)

  • 제34권6호
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  • Pages.247-257
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  • 2022
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  • 1976-8192(pISSN)
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  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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큰 조차에 따라 변화하는 지형의 대천 해수욕장 이안류 발생 특성 수치모의 연구

A Numerical Study of Rip Current Generation Modulated with Tidal Elevations at the Daecheon Beach

  • 최준우 (한국건설기술연구원 수자원하천연구본부)
  • Junwoo, Choi (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology)
  • 투고 : 2022.11.10
  • 심사 : 2022.12.08
  • 발행 : 2022.12.31
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초록

서해안에서 대규모 조차에 의해 변화하는 연안 수심의 영향으로 서로 다른 원인으로 생성되는 이안류 발달 특성을 수치모의 결과를 이용하여 검토하였다. 대천 해수욕장 앞바다의 수심자료를 이용하여 Boussinesq 방정식을 지배방정식으로 하는 FUNWAVE 모형으로 수치모의를 수행하였다. 대천 해수욕장 앞바다는 간조에서는 수면 위로 드러나는 바위 섬이 되고, 조위가 상승하면 수중의 암초가 되는 간출암들이 존재하는 등의 복잡한 지형이 관찰된다. 이를 포함한 조차에 의해 변화하는 수심지형의 영향으로 변형되는 파의 횡방향 비균등성에 의해 발생하는 이안류가 잘 재현되었다. 그 결과를 기반으로 조위에 따라 발생 가능한 이안류의 특성을 기술하였다.

In order to investigate the generations of rip currents modulated with the tidal elevations at a mega-tidal beach at the West Sea coast, numerical simulations of rip currents over the topography of the Daecheon beach were performed by using a Boussinesq-type wave and current model, FUNWAVE. The mega-tidal coast includes rocky outcrops (i.e., reefs) lying over or under the water surface according to the tidal elevations in the offshore and nearshore bathymetry. The offshore topographically-controlled rip currents were well reproduced due to the alongshore non-uniformities transformed by the tide-modulated topography. This study addressed the generation types of rip currents to occur at the mega-tidal coast with the tide-modulated outcrops and reefs.

키워드

과제정보

본 연구는 해양수산부 국립해양조사원의 "실시간 이안류 감시체계 확대 및 서비스" 사업의 지원으로 수행되었습니다.

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