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Implementation of Strategies for the Management of Dams with Sedimented Reservoirs
Water Resources Management ( IF 4.3 ) Pub Date : 2021-09-16 , DOI: 10.1007/s11269-021-02956-7
Pedro Wirley Castro 1 , Carlos Alberto Mantilla 1
Affiliation  

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%.



中文翻译:

水库大坝管理策略的实施

大坝通过中断河流的连续性来积累沉积物,导致水库蓄水能力的损失和生产寿命的减少。这些问题引起了人们对项目收益减少的日益关注。本文有助于实施沉积物转运策略和水库运行规则,以通过维持生态流动来减少溢流并恢复沉积物水库的技术经济可行性。主要难点在于水库的淤积限制了疏浚设备的机动性,堵塞了取水口。为了恢复水库的活力,分析了管理水资源和水库沉积的常用策略。控制水库淤积,恢复发电能力,在入口、库体和取水口实施和评估了不同的沉积物管理策略;这些策略包括减少沉积物的进入、恢复蓄水能力、清理涡轮机的取水口以恢复发电、发电过程中的垃圾桶清洁以及修改水力发电厂运行规则以优化经济收入。实施的策略在 3 年内成功地将溢流从 88% 减少到 40%,并通过平衡沉积物的流入和清除来稳定水库的存储容量。尽管涡轮机的进水口被清理干净,但水库其他区域的积聚量却增加了。最后,采用根本原因分析(RCA),

更新日期:2021-09-17
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