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首页> 外文会议>IAHR World Congress >OPTIMAL OPERATION OF A MULTI-RESERVOIR SYSTEM FOR ENVIRONMENTAL WATER DEMAND OF A RIVER-CONNECTED LAKE
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OPTIMAL OPERATION OF A MULTI-RESERVOIR SYSTEM FOR ENVIRONMENTAL WATER DEMAND OF A RIVER-CONNECTED LAKE

机译：河流湖北省环境水需求多储层系统的最佳运行

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River-connected lakes play important roles in flood control, drought mitigation, water quality maintenance, and biodiversity conservation of watersheds. However, their ecosystems' functioning and stability might be sensitive to the altered flow regimes due to dam construction and flow regulation. Dongting Lake of China is a large shallow lake directly connected to Yangtze River in the middle region, of which its ecosystem functions have been threatened and disturbed by the upstream water resource development. In the study, an optimization model that considers both the basic human needs and environmental water demand (EWD) of Dongting Lake is developed for the operations of a multi-reservoir system. The system covers the world's largest water resource project (Three Gorges Reservoir built on the upper Yangtze River) and two large reservoirs situated on the tributaries of Dongting Lake. The optimal target in pursuit of the ecological objective is to maximize the EWD satisfaction of Dongting Lake, which has been estimated from the analysis of long-term hydrological data. We use a support vector machine-based model to examine the response of lacustrine hydrological conditions to reservoir operation and inflow of other tributaries. The optimization is carried out for different scenarios, and the results show that: (i) the existing operation policy have been resulted in significant hydrologic alteration in the natural flow regime; (ii) an optimal joint operation policy proposed in the study could increase the general EWD satisfaction rate of Dongting Lake from 89.4% to 96.9%; (iii) the overall degree of lake's EWD satisfaction is mainly affected by the operation of Three Gorges Reservoir.
机译：河连接湖泊在流域的防洪，干旱缓解，水质维护和生物多样性保护中发挥重要作用。然而，由于大坝施工和流量调节，它们的生态系统的运作和稳定性可能对改变的流动制度敏感。中国洞庭湖是一座大型浅湖，直接连接到中部地区的长江，其生态系统功能受到上游水资源开发的威胁和干扰。在该研究中，为多水库系统的运营开发了一种考虑洞庭湖基本人类需求和环境水需求（EWD）的优化模型。该系统涵盖了世界上最大的水资源项目（三峡库区，建于上长江上的三峡水库）和位于洞庭湖支流上的两大水库。追求生态目标的最佳目标是最大化洞庭湖的EWD满意度，据估计了长期水文数据的分析。我们使用基于支持向量机的模型来检查Lapustrine水文条件到水库操作和其他支流流入的响应。优化是针对不同场景进行的，结果表明：（i）现有的操作策略已导致自然流动制度的显着水文改变; （ii）该研究中提出的最佳联合行动政策可以将洞庭湖的总体EWD满意度从89.4％增加到96.9％; （iii）湖泊EWD满意度的整体程度主要受三峡库区的运作影响。

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