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Implementation of Strategies for the Management of Dams with Sedimented Reservoirs

Author

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  • Pedro Wirley Castro

    (Celsia Colombia S.A.)

  • Carlos Alberto Mantilla

    (Celsia Colombia S.A.)

Abstract

Dams accumulate sediment by interrupting the continuity of rivers, resulting in a loss of reservoir water storage capacity and decreased productive life. These issues raise a growing concern about the decreasing benefits of projects. This paper contributes to the implementation of sediment transit strategies and operating rules of reservoirs to reduce overflows and recover the technical–economic viability of sedimented reservoirs by maintaining ecological flow. The main difficulty lies in the fact that sedimentation of the reservoir limits the mobility of dredging equipment and blocks the intake. To regain the viability of the reservoir, the commonly used strategies to manage water resources and reservoir sedimentation were analyzed. To control reservoir sedimentation and restore the generation capacity, different sediment management strategies were implemented and evaluated at the entrance, body of the reservoir and intake; these strategies included reduction of the entry of sediments, restoration of the storage capacity, clearing of the water intake for the turbines to restore power generation, trash rack cleaning during the power generation process and modification of the hydroelectric power plant operating rules to optimize the economic income. The implemented strategies successfully reduced overflows from 88 to 40% in 3 years and stabilized the reservoir storage capacity by balancing the inflow and removal of sediments. Although the water intake for the turbines was cleaned, accumulation increased in other areas of the reservoir. Finally, root cause analysis (RCA) was employed, and solutions were proposed to increase the capacity of the reservoir and reduce overflows to 15%.

Suggested Citation

  • Pedro Wirley Castro & Carlos Alberto Mantilla, 2021. "Implementation of Strategies for the Management of Dams with Sedimented Reservoirs," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(13), pages 4399-4413, October.
    • Handle: RePEc:spr:waterr:v:35:y:2021:i:13:d:10.1007_s11269-021-02956-7
    DOI: 10.1007/s11269-021-02956-7
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    References listed on IDEAS

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    1. Vahideh Eslami & Parisa-Sadat Ashofteh & Parvin Golfam & Hugo A. Loáiciga, 2021. "Multi-criteria Decision-making Approach for Environmental Impact Assessment to Reduce the Adverse Effects Of Dams," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(12), pages 4085-4110, September.
    2. Huffaker, Ray & Hotchkiss, Rollin, 2006. "Economic dynamics of reservoir sedimentation management: Optimal control with singularly perturbed equations of motion," Journal of Economic Dynamics and Control, Elsevier, vol. 30(12), pages 2553-2575, December.
    3. Marianna Lena Kambanou, 2020. "Life Cycle Costing: Understanding How It Is Practised and Its Relationship to Life Cycle Management—A Case Study," Sustainability, MDPI, vol. 12(8), pages 1-19, April.
    4. Adam Mubeen & Laddaporn Ruangpan & Zoran Vojinovic & Arlex Sanchez Torrez & Jasna Plavšić, 2021. "Planning and Suitability Assessment of Large-scale Nature-based Solutions for Flood-risk Reduction," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(10), pages 3063-3081, August.
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    Cited by:

    1. Bruno Molino & Annamaria De Vincenzo & Antonio Minó & Luigi Ambrosone, 2023. "Long-Term Water Management Model for Preserving Sustainable Useful Capacity of Reservoirs," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(5), pages 1879-1894, March.

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