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Numerical Analysis on Channel Width Variation for River Bed Stabilization Upstream of the Weir

  • Hydraulic Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

Numerical simulations for bed change and bank erosion were performed using a two-dimensional numerical model to analyze the effect of channel width variation on bed change for the 4.2 km section upstream of Changnyeong-Haman Weir in the Nakdong River of South Korea. Simulation result of bed degradation without bank erosion for 120 days with 1,000 m3/s of flow discharge was about 2 m greater than the case of simulation with bank erosion. The narrow channel section was continuously degraded over time in the simulation with the fixed boundary for bank lines. However, bed degradation decreased as the channel width increased when bank erosion or artificial width extension were considered in the modeling. The equilibrium condition for topographical changes in the study reach was demonstrated by the modeling results with different channel width and simulation time.

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Acknowledgements

This research was supported by Korea Institute of Construction Technology (Project name: Development of Floodplain Maintenance Technology for Enhancement of River Waterfront Value, Project number: 2013-0327) and by a grant (11-TI-C06) from Advanced Water Management Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.

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Authors and Affiliations

  1. Dept. of Water Resources, Pyunghwa Engineering Consultants, Anyang, 13949, Korea

    Yongsung Kwon

  2. Dept. of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, Goyang, 10223, Korea

    Un Ji & Eun-kyung Jang

  3. Dept. of Smart City and Construction Engineering, Korea University of Science and Technology, Goyang, 10223, Korea

    Un Ji

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  1. Yongsung Kwon
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  2. Un Ji
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  3. Eun-kyung Jang
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Correspondence to Un Ji.

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Kwon, Y., Ji, U. & Jang, Ek. Numerical Analysis on Channel Width Variation for River Bed Stabilization Upstream of the Weir. KSCE J Civ Eng 23, 2524–2531 (2019). https://doi.org/10.1007/s12205-019-0739-1

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  • DOI: https://doi.org/10.1007/s12205-019-0739-1

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