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Long-term Bed Change Analysis and Equilibrium Bed Elevation Prediction after Weir Construction in Nakdong River

낙동강의 보 구조물 설치 후 장기 하상변동 분석 및 평형하상고 예측에 관한 연구

  • Ji, Un (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Jang, Eun-Kyung (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Won (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 지운 (한국건설기술연구원 수자원.하천연구소) ;
  • 장은경 (한국건설기술연구원 수자원.하천연구소) ;
  • 김원 (한국건설기술연구원 수자원.하천연구소)
  • Received : 2015.09.03
  • Accepted : 2015.10.08
  • Published : 2015.10.31

Abstract

Bed changes in the Nakdong River were analyzed with long-term monitoring data for analyzing riverbed change patterns after Four Major Rivers Restoration Project (FMRRP). Also, possible long-term bed changes were predicted using one-dimensional numerical model for the section where the largest change was observed after FMRRP. The sensitive analysis was performed with different incoming sediment discharge conditions and sediment transport equations. The numerical model was calibrated by comparing short-term monitoring data and simulated results, and was applied for predicting bed change after 10 years. As a result of monitoring data analysis, the largest change in bed elevation occurred at the section between the Changnyeong-Haman and Hapcheon-Changnyeong weirs. The result of one-dimensional numerical modeling for 10 years indicated that maximum depositions of 2.07 m and 3.26 m were produced in this section.

Acknowledgement

Grant : (15주요)친수가치 제고를 위한 홍수터관리 기술 개발

Supported by : 한국건설기술연구원

References

  1. U. Ji, W. K. Yeo and S. W. Han, "Numerical Analysis for Bed Change due to Sediment Transport Capacity Formulas and Sediment Transport modes at the Upstream Approached Channel of the Nakdong River Estuary Barrage", Journal of Korea Water Resources Association, Vol. 43, No. 6, pp. 543-557, 2010. DOI: http://dx.doi.org/10.3741/JKWRA.2010.43.6.543 https://doi.org/10.3741/JKWRA.2010.43.6.543
  2. B. M. Duc, T. Wenka and W. Rodi, "Numerical Modeling of Bed Deformation in Laboratory Channels", Journal of Hydraulic Engineering, No. 130, pp. 894-904, 2014. DOI: http://dx.doi.org/10.1061/(ASCE)0733-9429(2004)130:9(894) https://doi.org/10.1061/(ASCE)0733-9429(2004)130:9(894)
  3. J. Huang, B. Greimann and C. T. Yang, "Numerical Simulation of Sediment Transport in Alluvial River with Flood plains", International Journal of Sediment Research, Vol. 18, No. 1, pp. 50-59, 2003.
  4. MLIT, River master plan report (modified) of Nakdong river basin, Ministry of Land, Infrastructure and Transport, 2009.
  5. WAMIS, Water Resources Management Information System, http://www.wamis.go.kr
  6. P. Ackers and W. R. White, "Sediment transport: A new approach and analysis", Journal of Hydraulics Division, ASCE, Vol. 99, No. 11, pp. 2041-2060, 1973.
  7. F. Engelund and E. E. Hansen, "A monograph of sediment transport in alluvial rivers", Technical University of Denmark, Copenhagen, pp. 62, 1967.
  8. C. T. Yang, "Incipient motion and sediment transport", Journal of Hydraulics Division, ASCE, Vol. 99, No. 10, pp. 1679-1704, 1973.
  9. H. W. Shen and C. S. Hung, "An Engineering approach to total bed-material load by regression analysis", Completion Report, 17p, 1969.
  10. W. R. Brownlie, "Prediction of flow depth and sediment transport in open channels", Report No. KH-R-43A, Institute of Technology, California, 1981.
  11. H. W. Shen and C. S. Hung, "Remodified Einstein Procedure for Sediment Load" Journal of Hydraulics Division, ASCE, Vol. 190, No. HY4, 1983. DOI: http://dx.doi.org/10.1061/(asce)0733-9429(1983)109:4(565) https://doi.org/10.1061/(asce)0733-9429(1983)109:4(565)
  12. USACE, "HEC-RAS River Analysis System-Hydraulic Reference Manual", US Army Corps of Engineers, Hydrologic Engineering Center, 2010.