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Local hydraulic jump effects on sediment deposition in open-channel flume experiments

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Abstract

When a river channel is narrow, bifurcated, or intersected, or when extreme weather or geological disasters cause shed rock masses to occupy a river flood channel, local hydraulic jumps may develop in the channel. Natural disasters such as landslides, floods, and debris flows occur upstream, will result in large transport rate of large-sized gravel particles. Those particles may be blocked in hydraulic jump areas, causing river channel water depth to rise. In this study, the effect of local hydraulic jumps on the sediment deposition rate was investigated in flume experiments. The ratio of upstream and downstream Froude numbers, particle size, Sediment supply intensity, and flow discharge all affected the sediment deposition rate. With increases in the ratio of upstream and downstream Froude numbers, particle size, and sediment supply intensity, the sediment deposition rate increased. The sediment deposition rate decreased with an increase in flow discharge. Approach hydraulic conditions and particle properties jointly determined the sediment deposition rate in a hydraulic jump section, and an empirical formula was developed using those parameters to calculate the sediment deposition rate. Thus, to identify risks and prevent disasters in mountain rivers, local changes in hydraulic conditions and particle properties need to be jointly evaluated.

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Acknowledgement

This research received other funding agency in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China

    Shi-hao Fu, Mao-lin Zhou, Wei-lin Xu, Wang-ru Wei & Guo-guang Wang

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  1. Shi-hao Fu
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  2. Mao-lin Zhou
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  3. Wei-lin Xu
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  4. Wang-ru Wei
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  5. Guo-guang Wang
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Corresponding author

Correspondence to Wei-lin Xu.

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Ethical approval: This article does not contain any studies with human participants or animals performed by any of the authors.

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Compliance with ethical standards

Conflict of interest: The authors declare that they have no conflict of interest. Wei-lin Xu is an editorial board member for the Journal of Hydrodynamics and was not involved in the editorial review, or the decision to publish this article. All authors declare that there are no other competing interests.

Informed consent: Informed consent was obtained from all individual participants included in the study.

Project supported by the National Natural Science Foundation of China (Grant Nos. 51609162, 51939007).

Biography: Shi-hao Fu (1996–), Male, Ph. D. Candidate

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Fu, Sh., Zhou, Ml., Xu, Wl. et al. Local hydraulic jump effects on sediment deposition in open-channel flume experiments. J Hydrodyn 35, 268–277 (2023). https://doi.org/10.1007/s42241-023-0022-2

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  • DOI: https://doi.org/10.1007/s42241-023-0022-2

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