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

  • 제28권3호
  • /
  • Pages.160-170
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  • 2016
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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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단면 유속관측을 통한 조석 유입구에서의 단면통과 유량 및 조량 산정

Estimation of Net Flux of Water Mass and Tidal Prism at a Tidal Entrance through Bottom Tracking with ADCP

  • 양수현 (전북대학교 토목공학과.방재연구센터) ;
  • 김용묵 (해양수산부 항만지역발전과) ;
  • 황규남 (전북대학교 토목공학과.방재연구센터)
  • 투고 : 2016.04.04
  • 심사 : 2016.06.23
  • 발행 : 2016.06.30
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초록

본 연구에서는 조석 유입구에서의 단면통과 유량 및 조량 산정을 목적으로 목포해역 내 조석 유입구에서 ADCP를 이용한 단면 유속관측이 수행되었다. 우선, 원시 관측자료는 지배적인 유속성분 도출을 위하여 단면의 회전정도를 고려한 좌표회전이 수행되었으며, 정규화를 통하여 수평/수직방향 Sigma 좌표로 변환되었다. 또한, 관측이 이루어지지 않는 저면과 수면 근처의 Blank zone 데이터는 von-Karman 유속분포식을 이용하여 보간되었다. 보정된 자료를 이용하여 단면통과 유량이 정량적으로 산정되었는데, 조석에 따른 단면통과 유량의 변화양상 뿐만 아니라 목포해역의 낙조우세적 조석특성이 잘 나타나는 것으로 확인되었다. 또한, 과거 연구들에서 제시되는 조량 산정자료의 조석조건을 보완하여 현장 관측자료에 기반한 조량산정 방법의 조건이 재정립되었으며, 새로운 정의에 근거하여 조석 유입구에서의 단면 유속관측 자료를 이용한 조량의 정량적 산정이 국내 최초로 수행되었다. 조량 산정결과는 과거 연구들로부터 도출된 조량과 조석 유입구 흐름 단면적의 상관관계 결과와 비교 분석되었으며, 산정된 결과는 과거 연구결과들과 잘 일치하는 것으로 나타났다.

In this study, the bottom tracking observation in the tidal entrance within Mokpo coast is performed using ADCP in order to estimate net flux of water mass and tidal prism. First of all, observed rawdata was conducted coordinate rotation considering rotation of the cross-section in order to derive the predominant velocity component. And observed rawdata is converted into Sigma coordinate with normalization and blank zone data near the water surface and bottom is interpolated using von-Karman equation. Net flux of water mass is calculated quantitively from the interpolated data, calculated results show that these represent well characteristic of ebb superiority at Mokpo coast as well as change of net flux of water mass with tide. Also, by complementing the definition of tidal prism proposed in past studies, the definition of tidal prism including tidal condition was re-established. Based on the new definition, tidal prism at a tidal entrance using bottom tracking data with ADCP is estimated quantitively for the first time domestically. The results are compared with those for results of previous study, calculated results were in good agreement with previous studies.

키워드

참고문헌

  1. Eysink, W.D. (1990). Morphologic response of tidal basins to changes. In: B.L. Edge (ed.), Coastal Engineering 1990 Proc., ASCE, New York, 1948-1961.
  2. Jarrett, J.T. (1976). Tidal prism-inlet area relationships. GITI report no. 3. Coastal Engineering Research Center, US Army Corps of Engineers, Fort Belvoir, VA, USA.
  3. Jung, E.-T., Kim, Y.M., Kim, D.H., Hwang, K.-N. (2012). An Experimental Study of Depositional Parameters of Cohesive Sediments in Semi-closed Bay. Journal of Korean Society of Coastal and Ocean engineers, 24(3), 159-165 (in Korean). https://doi.org/10.9765/KSCOE.2012.24.3.159
  4. Jung, T.S., Choi, J.H. (2010). Numerical Modeling of Ebb-Dominant Tidal Flow in the Mokpo Coastal Zone, Journal of Korean Society of Coastal and Ocean engineers, 22(5), 333-343 (in Korean).
  5. Kang, J.W., Song, J.J., Oh, N.S. (1998). Analysis of ebb-dominant tidal currents characteristics at Mokpo coastal zone. Journal of Korean Society of Civil Engineers, 18(1-2), 185-193 (in Korean).
  6. Kim, D.S., Kang, B.S. (2011). Validation of Assessment for Mean Flow Field using Spatial Averaging of Instantaneous ADCP Velocity Measurement. Journal of the Environmental Sciences, 20(1), 107-118 (in Korean). https://doi.org/10.5322/JES.2011.20.1.107
  7. Kim, Y.G. (2000). Port Glossary. Imagefile Publishing Co., ISBN 89-950112-1-1 (in Korean).
  8. Kim, Y.-M. (2015). A Numerical Study on Net Flux of Water and Suspended Sediment in Mokpo Coast. Ph.D dissertation, Chonbuk National University (in Korean).
  9. Kraus, N.C. (1998). Inlet cross-section area calculated by processbased model. Proceedings International Conference on Coastal Engineering. ASCE, Reston, VA, 3265-3278.
  10. Lee. D.H., Yoon, B.I., Kim, J.W., Gu, B.H and Woo, S.-B. (2012). The Cross-sectional Mass Flux Observation at Yeomha Channel, Gyeonggi Bay at Spring Tide During Dry and Flood Season, Journal of Korean Society of Coastal and Ocean engineers, 24(1), 16-25 (in Korean). https://doi.org/10.9765/KSCOE.2012.24.1.016
  11. Marcel J.F. Stive and R.D. Rakhorst (2008). Review of compirical relationships between inlet cross-section and tidal prism. Jounal of Water Resources and Environmental Engineering, No. 23.
  12. M.A. Powell, R.J. Thieke and A.J. Mehta (2006). Morphodynamic relataionships for ebb and flood delta volumes at Florida's entrances. Ocean Dynamics 56: 295-307. https://doi.org/10.1007/s10236-006-0064-3
  13. O’Brien, M.P. (1969). Equilibrium flow areas of inlets on sandy coasts. J Waterway Port Coast Ocean Eng 95(l), 43-52.
  14. Preisendorfer, R.W. and Mobley, C.D. (1988). Principal component analysis in meteorology and oceanography. Elsevier, 425.
  15. Rakhorst, R.D. (2007). Draft PhD thesis. Delft University of Technology.
  16. Robins, P.E., Davies, A.G. (2010). Morphological controls in sandy estuaries: the influence of tidal flats and bathymetry on sediment transport. Ocean Dynamics, Springerlink, 60(3), 503-517. https://doi.org/10.1007/s10236-010-0268-4
  17. Seo, S.W., Kim, J.H. (2003). Comparative Study for dry-wet Treatment Effect in a Tidal Hydrodynamic Simulation. Journal of Korean Society of Coastal and Ocean engineers, 15(2), 97-107 (in Korean).
  18. US Army Corps of Engineers (2006). Coastal Engineering manual Part II, EM 1110-2-1100, ISBN 1782661980.
  19. Van de Kreeke, J. and Haring, J. (1980). Stability of Estuary Mouths in the Rhine-Meuse Delta. Proceedings International Conference on Coastal Engineering, ASCE Press, NY, 2627-2639.
  20. Yi, S.-U. (1972). On the Tides, Tidal Currents and Tidal Prisms at Inchoen Harbor. Journal of the Oceanologial Society of Korea. 7(2), 86-97 (in Korean).
  21. Yoon, B.I., Woo, S.-B. (2012). Analysis of Tidal Asymmetry and Flood/Ebb Dominance around the Yeomha Channel in the Han River Estuary. Journal of Korea water resources, 45(9), 915-928 (in Korean) https://doi.org/10.3741/JKWRA.2012.45.9.915