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Impact of sedimentation by check dam on the hydrodynamics in the channel on the Loess Plateau of China

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  • Zhaohong Feng

    (Xi’an University of Technology)

  • Zhanbin Li

    (Xi’an University of Technology
    Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions)

  • Peng Shi

    (Xi’an University of Technology
    Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions)

  • Peng Li

    (Xi’an University of Technology
    Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions)

  • Tian Wang

    (Xi’an University of Technology)

  • Jinxiao Duan

    (Yellow River Engineering Consulting Co., Ltd.)

Abstract

The sedimentation by check dam in the channel affects hydrological process. In this study, the effects of the sedimentation on the dynamic process of runoff and erosion power were investigated by dynamic coupling models (MIKE SHE model and MIKE 11 model). The study area was located in Wangmaogou watershed in the Loess Plateau of China. Four scenarios including no check dam and check dam with siltation depths of 0, 4 and 8 m were designed to study the reduction effectiveness of check dam on the hydrodynamic processes. The research showed that the silt dam not only reduced the total volume flow rate of floods but also increased the flood duration and delayed the occurrence of flood peaks. The siltation depths of the dam influenced the flow velocity and runoff shear stress. With deposition, the channel was longer in 8 m siltation compared with 0 and 4 m siltation. The shear force and unit runoff power were remarkably reduced in the scenario of 8 m siltation, followed by 4 m, and lastly by 0 m. The dam system can still vastly reduce the flow velocity along the channel in the full state and decrease the maximum flow velocity along the channel by more than 50%. The decrease in flow velocity was the main reason for the decrease in the sediment-carrying capacity of the runoff, which directly reduced the runoff erosion intensity. This study provides the scientific basis for understanding the regulation of check dam and sedimentation on hydrological process.

Suggested Citation

  • Zhaohong Feng & Zhanbin Li & Peng Shi & Peng Li & Tian Wang & Jinxiao Duan, 2021. "Impact of sedimentation by check dam on the hydrodynamics in the channel on the Loess Plateau of China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 107(1), pages 953-969, May.
    • Handle: RePEc:spr:nathaz:v:107:y:2021:i:1:d:10.1007_s11069-021-04617-9
    DOI: 10.1007/s11069-021-04617-9
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    References listed on IDEAS

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    1. E. XEVI & K. Christiaens & A. Espino & W. Sewnandan & D. Mallants & H. Sørensen & J. Feyen, 1997. "Calibration, Validation and Sensitivity Analysis of the MIKE-SHE Model Using the Neuenkirchen Catchment as Case Study," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 11(3), pages 219-242, June.
    2. El-Said Ahmed & Larry Mays, 2013. "Model for determining real-time optimal dam releases during flooding conditions," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 65(3), pages 1849-1861, February.
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    Cited by:

    1. Lingqi Li & Kai Wu & Enhui Jiang & Huijuan Yin & Yuanjian Wang & Shimin Tian & Suzhen Dang, 2021. "Evaluating Runoff-Sediment Relationship Variations Using Generalized Additive Models That Incorporate Reservoir Indices for Check Dams," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(11), pages 3845-3860, September.

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