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首页> 外文期刊>River Research and Applications >RE-OPERATING THE THREE GORGES RESERVOIR FOR ENVIRONMENTAL FLOWS: A PRELIMINARY ASSESSMENT OF TRADE-OFFS
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RE-OPERATING THE THREE GORGES RESERVOIR FOR ENVIRONMENTAL FLOWS: A PRELIMINARY ASSESSMENT OF TRADE-OFFS

机译：重新运营三峡水库进行环境流量：权衡的初步评估

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摘要

The Three Gorges Reservoir (TGR), located on the Yangtze River in China, is operated for hydropower, flood control and navigation, with minimal environmental releases. This study explored the potential trade-offs between better environmental releases from the TGR and hydro-power generation using three performance indicators. Spearman's rank correlation coefficient between unimpaired flows and regulated flows was used as an indicator of environmental performance (eco rho). Energy generation as a fraction of capacity (energy fraction) and power reliability were used as hydropower performance indicators. We first assessed TGR performance without and with basic instream flow requirements (IFRs). We then imposed an IFR consisting of a minimum release of fraction k of inflow and maximum release of 1/k of inflow and assessed the sensitivity of reservoir performance to different fixed k values. Finally, we allowed k to vary within the year in a genetic algorithm to estimate the Pareto optimal trade-offs between performance indicators. In all cases, flood and navigation rules were prioritized over environmental and hydropower. With a fixed k of 1.0, eco rho increased from 0.865 to nearly 1.0 (completely natural). Energy fraction reduced from 43.5 to 39.3%, or about 9.5%, and power reliability decreased from 97.0 to 59.2%. The Pareto optimal trade-off surface not only showed similar results but also indicated that energy fraction and environmental performance can both be increased together, up to a point, but at a cost of reliability. This study helps understand the potential costs of re-operating the TGR. Limitations and potential future directions are discussed.
机译：位于中国长江的三峡水库（TGR）用于水电，防洪和航行，对环境的排放最小。这项研究使用三个绩效指标探讨了TGR释放的更好的环境释放与水力发电之间的潜在权衡。未受损流量与管制流量之间的Spearman等级相关系数被用作环境绩效的指标（eco rho）。发电量占发电量的一部分（能源部分）和电力可靠性被用作水电性能指标。我们首先评估了在没有基本流量需求的情况下的TGR性能。然后，我们强加了一个IFR，该IFR由流入量k的最小释放量和流入量k / k的最大释放量组成，并评估了储层性能对不同的固定k值的敏感性。最后，我们用遗传算法允许k在一年内变化，以估计绩效指标之间的帕累托最优权衡。在所有情况下，洪水和航行规则都优先于环境和水力发电。固定k为1.0时，eco rho从0.865增加到接近1.0（完全自然）。能量分数从43.5降低至39.3％，或约9.5％，电源可靠性从97.0降低至59.2％。帕累托最优折衷表面不仅显示出相似的结果，而且表明能量分数和环境性能都可以一起提高，直到一个点，但是以可靠性为代价。这项研究有助于了解重新操作TGR的潜在成本。限制和潜在的未来方向进行了讨论。

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  • 来源
    《River Research and Applications》 |2016年第3期|257-266|共10页
  • 作者

    D. E. RHEINHEIMER; P. LIU; S. GUO;

  • 作者单位

    State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei, China,School of Engineering, University of California, Merced, California, USA;

    State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei, China;

    State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei, China;

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  • 正文语种 eng
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  • 关键词

    Three Gorges Reservoir; reservoir operations; environmental flows; hydropower; trade-offs;

    机译：三峡水库;水库作业;环境流量;水电权衡;

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