Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Analysis of Flow and Bed Changes by Hydraulic Structure using CCHE2D: Focusing on Gangjeong-Goryeong Weir

수리구조물에 의한 흐름 및 하상변동 연구- 강정고령보를 중심으로 -

  • Ahn, Jung-Min (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Jung, Kang-Young (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Shin, Dongseok (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Lyu, Siwan (Department of Civil Engineering, Changwon National University)
  • 안정민 (국립환경과학원 낙동강물환경연구소) ;
  • 정강영 (국립환경과학원 낙동강물환경연구소) ;
  • 신동석 (국립환경과학원 낙동강물환경연구소) ;
  • 류시완 (국립창원대학교 토목공학과)
  • Received : 2016.06.27
  • Accepted : 2017.04.13
  • Published : 2017.05.31
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Abstract

Analysis using a numerical model is important to understand the sediment transport mechanism associated with erosion and sedimentation near weirs and other hydraulic structures within riverine systems. The local riverbed change near a hydraulic structure (Gangjeong-Goryong multi-function weir in the Nakdong river) was analyzed in order to examine the effect of hydraulic structures on local bed change. A 2D numerical model (CCHE-2D) was employed to simulate the sedimentation and erosion over a reach (25 km) including the weir. For the calibration and verification of the model, rainfall data from a real event (Typoon 'Ewiniar' in 2006) were used for flow and stage simulation. And the simulated results show a good agreement with the observed data for the whole domain. From the result, it was found that the installation and operation of the weir could aggravate bed changes by typhoon between movable weirs, and which resulted in redistribution of sediment.

침식 및 퇴적과 관련된 수치모형을 이용한 분석은 하천에 존재하는 보와 같은 수리구조물들의 유사이송을 연구하는데 중요한 요소이다. 본 연구에서는 다기능보들의 효과적인 운영을 위하여 낙동강수계에 위치해 있는 강정고령보를 대상으로 하상변동을 예측하였다. 2차원 모형은 CCHE2D를 이용하여 유사이송이 지배적으로 발생하는 다기능보 상 하류 구간 25km를 대상으로 침식과 퇴적에 대한 모의를 수행하였다. 2006년 태풍 "에위니아"사상을 대상으로 모형을 검 보정 하였으며, 모의결과와 관측값의 비교를 통하여 전체 모의구간에서 신뢰성 있는 결과가 도출되었다. 강정고령보가 건설된 이후 태풍사상에 의한 하상변동은 가동보 구간에서 상당히 증가하는 것으로 나타났고 하상변동은 유사의 재분배를 야기하였다.

Keywords

References

  1. Ackers, P., and White, W.R. 1973. Sediment transport New approach and analysis. J. of Hydraulic Div.. ASCE. 99 (HY11): 2041-2060.
  2. Ahn, J.M., and Lyu, S. 2012. Development of GUI System for Coupling of Multi-Dimensional Hydraulic Models. J. of Korean Wetlands Society. 14,(3): 353-363. [Korean Literature]
  3. Ahn, J.M., and Lyu, S. 2013. A Study on the Effect of Dredging and Operation of Weirs on Hydraulic Characteristics in Nakdong River. J. of Korean Society of Civil Engineers. 33(5): 1829-1841. [Korean Literature] https://doi.org/10.12652/Ksce.2013.33.5.1829
  4. Ahn, Jung Min, Park, In Hyeok 2012. An assessment on the hydraulic characteristics of a multi-dimensional model in response to measurement resolution and spatial interpolation methods, J. of The Korean Society for GeoSpatial Information System, 20(1): 43-51. [Korean Literature] https://doi.org/10.7319/kogsis.2012.20.1.043
  5. Ahn, Jung Min, Park, In Hyeok, Lyu, Siwan, Hur, Young Teck. 2012. Evaluation of optimal grid resolution for hydrodynamic proper simulation. J. of The Korean Society for GeoSpatial Information System. 20(1): 109-116. [Korean Literature] https://doi.org/10.7319/kogsis.2012.20.1.109
  6. Ahn, J.M., Hur, Y.T., Lyu, S. 2013. Coupling Simulation with Multi-dimensional Models for River Flow. J. of Korean Society of Civil Engineers. 33(1): 1-10. [Korean Literature] https://doi.org/10.12652/Ksce.2013.33.1.001
  7. Akcelik, V., Jaramaz, B., and Ghattas, O. 2001. Nearly Orthogonal Two-Dimensional Grid Generation with Aspect Ratio Control. J. of Computational Physics. 171: 805-821. https://doi.org/10.1006/jcph.2001.6811
  8. Briaud JL, Ting F, Chen H, Cao Y, Gudavalli R, Perugu S. 1999. Sricos: prediction of scour rate in cohesive soils at bridge piers. J Geo Geoenv Soc Am. ASCE. 125(4): 237-246. https://doi.org/10.1061/(ASCE)1090-0241(1999)125:4(237)
  9. Formann, E., Habersack, H. M., Schober St. 2007. Morphodynamic river processes and techniques for assessment of channel evolution in Alpine gravel bed rivers. Geomorphology. 90: 340-355. https://doi.org/10.1016/j.geomorph.2006.10.029
  10. Huang, Sui-Liang, Jia, Y. F., Wang, Sam S. Y. 2006. Numerical modeling of suspended sediment transport in channel bends, J. of Hydrodynamics. 18(4): 411-417. https://doi.org/10.1016/S1001-6058(06)60113-3
  11. Hur, Y.T., and Park, J.H. 2009. Assessment of EFDC model for hydrodynamic analysis in the Nakdong river. J. of Korea Water Resources Association. 42(4): 309-317. [Korean Literature] https://doi.org/10.3741/JKWRA.2009.42.4.309
  12. Jia, Y., Wang, S.S.Y. 2001. CCHE2D: two-dimensional hydrodynamic and sediment transport model for unsteady open channel flows over loose bed. Technical Report. NCCHE-TR-2001-1. National Center for Computational Hydroscience and Engineering. University of Mississippi. University. Mississippi.
  13. Ji, Un, Yeo, Woon Kwang, Han Seung Won. 2010. Numerical analysis for bed changes dut to sediment transport capacity formulas and sediment transport modes at the upstream approached channel of th Nakdong river estuary barrage. J. of Korea Water Resources Association. 43(6): 543-557. [Korean Literature] https://doi.org/10.3741/JKWRA.2010.43.6.543
  14. Khosronejad Ali, Kang, Seokkoo, Sotiropoulos, Fotis. 2012. Experimental and computational investigation of local scour around bridge piers. Advances in Water Resources. 37: 73-85. https://doi.org/10.1016/j.advwatres.2011.09.013
  15. Korea Water Resources Association. 2009. River Design Criteria.
  16. Korea Water Resources Association. 2010. Report of analysis results for numerical model input data on river bed change research.
  17. Lee, Ji-Wan, Lee, Mi-Seon, Jung, In-Kyun, Park, Geun-Ae, Kim, Seong-Joon. 2011. Stream type classification and 2-dimensional hydraulic characteristics and bed change in Anseongcheon streams and tributaries. J. of The Korean Association of Geographic Information Studies. 14(4): 77-91. [Korean Literature] https://doi.org/10.11108/kagis.2011.14.4.077
  18. Lee, Y. 1975. Study on porosity and permeability. National Science Exhibition, http://www.science.go.kr/nalcoding/exhibit/boardview.jspview=4092.
  19. Margaret W.Gitau and Indrajeet Chaubey. 2010. Regionalization of SWAT Model Parameters for Use in Ungauged Watersheds. J. of Water. 2: 849-871. https://doi.org/10.3390/w2040849
  20. Ministry of Land, Transport and Maritime Affairs. 2004. Nakdong river watershed survey.
  21. Ministry of Land, Transport and Maritime Affairs. 2009a. The basic plan of stream-improvement for Nakdong river-Geumho river-Estuary.
  22. Ministry of Land, Transport and Maritime Affairs. 2009b. The detail design of development of residential sites for Nakdong river 23 district.
  23. Ministry of Land, Transport and Maritime Affairs. 2010. The detail design of development of residential sites for Nakdong river 23 district-Hydraulic model experiment.
  24. National Typhoon Center. http://hyp.kma.go.kr.
  25. Nassar, M. A. 2011. Multi-parametric sensitivity analysis of CCHE2D for channel flow simulations in Nile river. J. of Hydro-environment Research. 5: 187-195. https://doi.org/10.1016/j.jher.2010.12.002
  26. Nash, j. E. and J. V. Sutcliffe. 1970. River flow forecasting through conceptual model; Part1 - A discussion of principles. J. of Hydrology. 10(3): 398-409.
  27. Richardson, E.V., and Davis, S.R. 2001. Evaluating scour at bridges (4th ed.), U.S. Federal Highway Administration Publication FHWA NHI 01-001 Hydraulic Engineering Circular. 18: 378.
  28. Servat, E., and Dezetter, A. 1991. Selection of calibration objective functions in the context of rainfall runoff modeling in a Sudanese savannah area. Hydrological Sciences Journal. 36(4): 307-330. https://doi.org/10.1080/02626669109492517
  29. Shields, A. 1936. Application of similarity principles and turbulence research to bed-load movement. Mitteilunger der Preussischen Versuchsanstalt fur Wasserbau und Schiffbau. 26: 5-24.
  30. Smagorinsky, J. 1963. General circulation experiments with the primitive equation. I. The basic experiment. Monthly Weather Review. 91: 99-164. https://doi.org/10.1175/1520-0493(1963)091<0099:GCEWTP>2.3.CO;2
  31. Wohl 2000. Mountain Rivers. Water Resources Monograph, 14 American Geophysical Union Press. Washington. DC.
  32. Yang, C.T. 2003. Sediment transport. Cheong Moon Gak.
  33. Yoo, K.G. and Wu, H.S. 1990. Comparative Evaluation of Some Selected Sediment Transport Formulas. J. of Korean Society of Civil Eng. 10(4): 67-75. [Korean Literature]