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

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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The Study of Salinity Distribution at Nakdong River Estuary

낙동강 하구 염분 농도 분포에 관한 연구

  • Han, Chong-Soo (Dept. of Civil Engineering, School of Civil and Environmental Engineering, Pusan National University) ;
  • Park, Sang-Kil (Dept. of Civil Engineering, School of Civil and Environmental Engineering, Pusan National University) ;
  • Jung, Sang-Woo (Dept. of Civil Engineering, School of Civil and Environmental Engineering, Pusan National University) ;
  • Roh, Tae-Young (Dept. of Civil Engineering, School of Civil and Environmental Engineering, Pusan National University)
  • 한종수 (부산대학교 사회환경시스템공학부) ;
  • 박상길 (부산대학교 사회환경시스템공학부) ;
  • 정상우 (부산대학교 사회환경시스템공학부) ;
  • 노태영 (부산대학교 사회환경시스템공학부)
  • Received : 2011.01.13
  • Accepted : 2011.02.10
  • Published : 2011.02.28
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Abstract

The purpose of salinity intrusion due to numerical simulation is analaysis for saline intrusion to the upstream channel in Nakdong River Estuary Barrage(NREB) to get enough fresh water. Conditions that occur salinity intrusion affect by tidal distribution at seas, so salinity concentration changes according to tidal phenomenon. Making this connection cleary can help preventing salinity intrusion. In this study, estimating salinity intrusion to the upstream channel in NREB using EOMSED model, we reexamine NREB's existence. Comparison is also made with observing data. In result, when inflow discharges at $75m^3/s$ is more similar with respect to observing data than $130m^3/s$ at ECOMSED model. Thus, estimations are more precise at little discharges than lots of discharges.

염분도 수치계산의 목적은 낙동강 하구둑 상류로 침투되는 염수 쐐기 침입을 분석하여 담수량을 확보하는데 있다. 염분 침투가 발생되는 조건은 바다에서의 조석 분포에 따라서 침투길이가 달라지고 있으므로 염분농도는 조석의 현상에 따라서 달라진다. 이러한 현상을 확실히 파악하면 보다 효율적으로 염분 침투를 차단할 수 있다. 본 연구에서는 염분 침투에 대해서 ECOMSED 모델을 이용하여 낙동강 하구둑 상류로 침투되는 염분농도를 정확히 추정함으로써 낙동강 하구둑의 존재를 재평가하게 될 것이다. 또한 이 모델의 타당성을 입증하기 위해 실제 관측값과 비교하였다. 분석결과 ECOMSED모델은 상류 유입유량이 $130m^3/s$의 경우가 $75m^3/s$보다 실제 관측값과 거의 동일한 값을 나타내었다. 따라서 유입유량이 많은 경우가 적은 경우보다 예측이 정확한 것을 알 수 있다.

Keywords

References

  1. 김도훈 (2010). 낙동강 하구둑 염분 침입 조사.분석 및 방지 대책 연구. 박사학위논문. 부산대학교.
  2. 지운, Julien Pierre Y., 박상길, 김병달 (2008). 낙동강 하류의 유사특성과 낙동강하구둑 준설효과에 관한 수치모의 연구. 대한토목학회논문집, 28(4), 405-411.
  3. 한국건설기술연구원 (1989). 하천 유사량 산정방법의 선정기준 개발. 기본연구과제 보고서. 89-WR-112, 건기연.
  4. 한국건설기술연구원 (1990). 수정 아인쉬타인 방법의 한국하천에의 적용 - 하천총유사량의 추정. 90-WR-112, 건기연.
  5. 한국건설기술연구원 (1991). 하상변동 예측모형의 비교분석. 91- WR-112, 건기연.
  6. 한국수자원공사 (1995). 낙동강하구둑 퇴사 거동 특성에 관한 연구.
  7. 한국수자원공사 (2004). 낙동강 유역조사.
  8. 한국수자원공사 (2008). 낙동강 하구둑 유지관리 개선방안 연구 보고서.
  9. Blumberg, A. F. and Mellor G. L. (1987). A description of a three-dimensional coastal ocean circulation model. In Three dimensional coastal ocean model., Coastal and Estuarine Science. Vol.4, American Geophysical Union, Washington DC., 1-16.
  10. Davies-Colley, R. J. and Smith D. G. (2001). Turbidity, suspended sediment, and water clarity : A review. Journal of the American Water Resources Association, 37(5), 1085-1101. https://doi.org/10.1111/j.1752-1688.2001.tb03624.x
  11. Haidvogel, D. B., Arango H. G., Hedstrom K., Beckmann A., Malanotte- Rizzoli P. and Shchepetkin A. F. (2000). Model evaluation experiments in the North Atlantic Basin: Simulations in nonlinear terrain-following coordinates, Dyn. Atmos. Oceans, 32, 239-281. https://doi.org/10.1016/S0377-0265(00)00049-X
  12. Han, Q., and He, M. (1990). A mathematical model for reservoir sedimentation and fluvial processes. Int.J.of Sediment Res., IRTCES, 5(2), 43-84.
  13. Holly, F. M. Jr. and Rahuel, J. K. (1990). New numerical/physical frame work for mobile Part I: Numerical and physical principles. Journal of Hydraulic Research., 28(4), 401-416. https://doi.org/10.1080/00221689009499057
  14. HydroQual (2002). A primer for ECOMSED version 1.3 User Manual
  15. ISWACO-NEDECO (1987). Nakong River Estuary Barrage and Reclamation project: Operation manual. Republic of Korea Industrial Sites and Water Resources, Development Corporation and Netherlands Engineering Consultants.
  16. Park, S. K., Julien, P. Y., Ji, U. and Ruff, J. F. (2008). Case Study: Retrofitting large bridge piers on the Nakdong River, South Korea. Journal of Hydraulic Engineering, ASCE, 134(11), 1639-1650. https://doi.org/10.1061/(ASCE)0733-9429(2008)134:11(1639)

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