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中文摘要：
随着人口增长和经济的快速发展,长江流域水资源开发利用程度日益提高,修建了大量水利工程,特别是大坝建设。各种人类活动（包括大坝建设）在一定程度上改变长江的径流特性,从而影响了不同用户之间的水量分配,进而可能影响水库下游生态用水量。分析不同蓄水方案条件三峡水库的运行对其下游最小生态径流满足度的影响。研究结果表明：提前蓄水减轻了水库运行对下游生态径流满足度的影响。本文为保护长江生态系统的健康与稳定提供参考。
英文摘要：
With population increase and economic growth,the flow regime of the Yangtze River has been altered to some extent by human activities,and particularly by dam construction.Dam-induced alterations in the flow regime will unavoidably influence water allocation among different water uses and instream ecological water requirements may not be satisfied.To assess the impacts of the Three Gorges reservoir operation on the downstream minimum instream ecological water requirements,this paper selected this reservoir and the Yichang hydrological station below the reservoir as case study sites.The reservoir outflows of two water storage schemes were simulated using the long-term time series of daily discharge data,and a satisfaction factor for the downstream minimum ecological flow was computed.This work would provide references for the integrated management of the river＇s water resources and the assessment of dam-induced impacts on the river＇s ecosystem health.
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