The operation of multi-reservoir system has significantly influence on ecological system in riverine by altering natural streamflow. To alleviate the negative impacts on the ecosystem in a small-scale watershed, ecological flow requirements (EFRs) are incorporated in the operating strategies to tradeoff between the existing human needs and EFRs. In this study, three scenarios of EFRs are firstly generated to study the impacts on the operation efficiency of the existing objectives. Then, the reservoirs are classified into three categories, and the operation strategies are defined, respectively. Finally, the operation strategies are optimized using NSGA-II algorithm and used to simulate the operation processes. The simulation results indicate that the operation objectives between the EFRs and agricultural irrigation have a significant competitive relationship, and the guarantee rate for agricultural irrigation decreases with the EFRs increasing. The reservoirs in the third category with large storage capacity have strong regulation ability for the EFRs, however the reservoir operations in other categories are more vulnerable in term of guarantee rate for irrigation.

多水库系统的运行会通过改变自然流量而对河流生态系统产生重大影响。为了减轻小规模流域对生态系统的负面影响，将生态流量要求（EFR）纳入运营策略，以在现有人类需求和EFR之间进行权衡。在这项研究中，首先生成了三种EFR情景，以研究对现有目标的运营效率的影响。然后，将油藏分为三类，并分别定义了作业策略。最后，使用NSGA-II算法优化了操作策略，并用于模拟操作过程。仿真结果表明，EFRs与农业灌溉之间的运行目标具有显着的竞争关系，随着EFRs的增加，农业灌溉的保证率降低。第三类蓄水量大的水库对EFR具有很强的调节能力，但是其他类别的水库在灌溉保证率方面则较脆弱。