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Sediment Flushing of Reservoirs under Environmental Considerations

Author

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  • A. Moridi

    (Shahid Beheshti University)

  • J. Yazdi

    (Shahid Beheshti University)

Abstract

Freshwater reservoirs are under threat because of huge amounts of sediments deposited annually. Sediment flushing seems to be effective to preserve reservoir storage, but it may have negative environmental impacts on downstream ecosystems such as fish mortality. Therefore, providing a suitable flushing strategy that could be compatible with the river ecosystem downstream is of great importance. Two numerical models were developed in this paper to predict the suspended sediment concentration (SSC) on the reservoir-river system and effects of different flushing scenarios on aquatic life. Developed models were applied to the Dez Resevoir system in the southwest of Iran which has suffered from the sediment problems in two last decades. The suitable values for flushing time, concentration limits, and flushing discharge have been recommended in this research by use of the existing information and previous flushing records, as well as field measurement and modeling. Based on social, environmental and technical limitations, March is the appropriate time for flushing. After hydraulic simulation of different flushing scenarios and sediment routing along the river, flushing with 1275 and 800 cubic meter per second with 30 and 20 g per lit concentration in dry and wet season respectively are feasible and have minimum environmental impacts.

Suggested Citation

  • A. Moridi & J. Yazdi, 2017. "Sediment Flushing of Reservoirs under Environmental Considerations," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(6), pages 1899-1914, April.
    • Handle: RePEc:spr:waterr:v:31:y:2017:i:6:d:10.1007_s11269-017-1620-y
    DOI: 10.1007/s11269-017-1620-y
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    References listed on IDEAS

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    1. J. Yazdi & S. Salehi Neyshabouri, 2012. "A Simulation-Based Optimization Model for Flood Management on a Watershed Scale," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(15), pages 4569-4586, December.
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    Cited by:

    1. Nurdan Kuban, 2021. "Hydroelectric Plants and Dams as Industrial Heritage in the Context of Nature-Culture Interrelation: An Overview of Examples in Turkey," Energies, MDPI, vol. 14(5), pages 1-21, February.

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