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Adapting the operation of two cascaded reservoirs for ecological flow requirement of a de-watered river channel due to diversion-type hydropower stations

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  • Chen, Qiuwen
  • Chen, Duan
  • Li, Ruonan
  • Ma, Jinfeng
  • Blanckaert, Koen

Abstract

Alteration of hydrological regime due to reservoir operation has significant impacts on the river ecosystem, in particular for diversion-type hydropower stations that make part of the natural river channel considerably de-watered. Maintaining ecological flow is considered an effective way to remediate the damages. However, it may jeopardize the socio-economic benefit of reservoirs, for example reduction of power production. The conflicting objectives bring a dilemma to water managers in defining the reservoir operation policy. This study considers two cascaded reservoirs in the Yalong River, and develops an optimization model to explore trade-offs between hydropower generation and ecological flow requirement. The objective function of the model is the total power production. In addition to conventional constraints on the water level and discharge, the model takes into account downstream ecological flow requirement, defined as a hydrograph representing the daily flow requirement to conserve the habitats of the indigenous fish Schizothorax chongi (S. chongi). The optimization model allows establishing a relation between the target of fish habitat conservation and the corresponding loss of hydropower production, so as to propose compromise solutions. Although the model has only been applied in the paper to one case study, its generic formulation allows applying it to a broad range of cascaded reservoir configurations. Moreover, extensions towards cases with ecological flow requirements for more than one species are straightforward.

Suggested Citation

  • Chen, Qiuwen & Chen, Duan & Li, Ruonan & Ma, Jinfeng & Blanckaert, Koen, 2013. "Adapting the operation of two cascaded reservoirs for ecological flow requirement of a de-watered river channel due to diversion-type hydropower stations," Ecological Modelling, Elsevier, vol. 252(C), pages 266-272.
    • Handle: RePEc:eee:ecomod:v:252:y:2013:i:c:p:266-272
    DOI: 10.1016/j.ecolmodel.2012.03.008
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    References listed on IDEAS

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    Cited by:

    1. Chunxue Yu & Xinan Yin & Zhifeng Yang & Zhi Dang, 2019. "Sustainable Water Resource Management of Regulated Rivers under Uncertain Inflow Conditions Using a Noisy Genetic Algorithm," IJERPH, MDPI, vol. 16(5), pages 1-21, March.
    2. Duan Chen & Ruonan Li & Qiuwen Chen & Desuo Cai, 2015. "Deriving Optimal Daily Reservoir Operation Scheme with Consideration of Downstream Ecological Hydrograph Through A Time-Nested Approach," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(9), pages 3371-3386, July.
    3. Jenq-Tzong Shiau & Chian-You Huang, 2014. "Detecting Multi-Purpose Reservoir Operation Induced Time-Frequency Alteration Using Wavelet Transform," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(11), pages 3577-3590, September.
    4. Wen, Xin & Fang, Guo-hua & Guo, Yu-xue & Zhou, Lei, 2016. "Adapting the operation of cascaded reservoirs on Yuan River for fish habitat conservation," Ecological Modelling, Elsevier, vol. 337(C), pages 221-230.
    5. Changwen Li & Ling Kang, 2014. "A New Modified Tennant Method with Spatial-Temporal Variability," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(14), pages 4911-4926, November.
    6. Li, Weiming & Chen, Qiuwen & Cai, Desuo & Li, Ruonan, 2015. "Determination of an appropriate ecological hydrograph for a rare fish species using an improved fish habitat suitability model introducing landscape ecology index," Ecological Modelling, Elsevier, vol. 311(C), pages 31-38.
    7. Kuriqi, Alban & Pinheiro, António N. & Sordo-Ward, Alvaro & Bejarano, María D. & Garrote, Luis, 2021. "Ecological impacts of run-of-river hydropower plants—Current status and future prospects on the brink of energy transition," Renewable and Sustainable Energy Reviews, Elsevier, vol. 142(C).

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