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Sediment Flushout from Pond of River Diversion Barrages by Gate Operation

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Abstract

Construction of river diversion barrages produces a shallow reservoir, called the pond, which is used more often for flow balancing between the inflows of the river and the outflows of the off-taking canal. However, deposition of sediment in the pond due to the relatively low velocities reduces the pond capacity. The current study investigates the effectiveness of gate operation and variations of other parameters in flushing out these sediment mounds, or shoals, from the barrage pond. Data from laboratory experiments on a scaled model of a prototype barrage is used to train and test different Artificial Neural Network (ANN) models of the system. The models map the relationship between flushing efficiency of a sediment shoal from the upstream of a barrage, and the parameters river discharge, barrage pond depth and area of gate opening, position of the sediment shoal with respect to the barrage. The ANN models are then used to study the effect of different parameters on the sediment flushing efficiency. Apart from river discharge and net area of gate opening, upstream pond depth is also found to have a significant effect on flushing efficiency, with a general trend of decrease in efficiency with increase in pond depth becoming apparent. Efficacy of different gate opening pattern is also tested, with the ‘inverted arch’ gate opening pattern proving to be the most efficient when compared with ‘arch’ and ‘uniform’ gate opening.

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Acknowledgments

The authors would like to thank the staff at the Hydraulics Lab of Indian Institute of Technology Kharagpur, India, for their assistance during the laboratory experiments. The authors would also like to thank the two anonymous reviewers for the thorough and fair review of the study, which we think has help improve this article.

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Authors and Affiliations

  1. Water Resources Investigation & Development Department, Midnapore, Government of West Bengal, India

    Malay Kanti Ghosh

  2. Graduate Research Assistant at University of Illinois, Urbana-Champaign, IL, USA

    Som Dutta

  3. Department of Civil Engineering, Indian Institute of Technology at Kharagpur, Midnapore, West Bengal, India

    Dhrubajyoti Sen

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  1. Malay Kanti Ghosh
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  2. Som Dutta
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  3. Dhrubajyoti Sen
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Correspondence to Malay Kanti Ghosh.

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Ghosh, M.K., Dutta, S. & Sen, D. Sediment Flushout from Pond of River Diversion Barrages by Gate Operation. Water Resour Manage 28, 5335–5356 (2014). https://doi.org/10.1007/s11269-014-0804-y

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  • DOI: https://doi.org/10.1007/s11269-014-0804-y

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