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3D Layer-Integrated Modelling of Morphodynamic Processes Near River Regulated Structures

Author

Listed:
  • S. Faghihirad

    (Water Research Institute
    Cardiff University)

  • B. Lin

    (Cardiff University
    Tsinghua University)

  • R. A. Falconer

    (Cardiff University)

Abstract

Sedimentation and erosion can significantly affect the performance of river regulated reservoirs. In the vicinity of flow control structures, the interaction between the hydrodynamics and sediment transport often induces complex morphological processes. It is generally very challenging to accurately predict these morphological processes in real applications. Details are given of the refinement and application of a three-dimensional (3-D) layer integrated model to predict the morphological processes in a river regulated reservoir. The model employs an Alternating Direction Implicit finite difference algorithm to solve the mass, momentum and suspended sediment transport conservation equations, and an explicit finite difference scheme for the bed sediment mass conservation equation for calculating bed level changes. The model is verified against experimental data reported in the literature. It is then applied to a scaled physical model of a regulated reservoir, including the associated intakes and sluice gates, to predict the velocity distributions, sediment transport rates and bed level changes in the vicinity of the hydraulic structures. It is found that the velocity distribution near an intake is non-uniform, resulting in a reduction in the suspended sediment flux through the intake and the formation of a sedimentation zone inside the reservoir.

Suggested Citation

  • S. Faghihirad & B. Lin & R. A. Falconer, 2017. "3D Layer-Integrated Modelling of Morphodynamic Processes Near River Regulated Structures," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(1), pages 443-460, January.
    • Handle: RePEc:spr:waterr:v:31:y:2017:i:1:d:10.1007_s11269-016-1537-x
    DOI: 10.1007/s11269-016-1537-x
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    References listed on IDEAS

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    1. Xin Wan & Guang Wang & Peng Yi & Wei Bao, 2010. "Similarity-Based Optimal Operation of Water and Sediment in a Sediment-Laden Reservoir," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(15), pages 4381-4402, December.
    2. Noor Khan & Mukand Babel & Tawatchai Tingsanchali & Roberto Clemente & Huynh Luong, 2012. "Reservoir Optimization-Simulation with a Sediment Evacuation Model to Minimize Irrigation Deficits," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(11), pages 3173-3193, September.
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