Aiming at the extensive management problems in ecological operation and ecological irrigation, this paper proposed a novel ecological irrigation method—ecological infiltration irrigation (EII), and established a multi-scale ecological operation model of reservoir group coupled with EII for the irrigation and restoration of river valley grasslands. Firstly, the ecological available water supplies in ecological periods were obtained by long-term ecological operation. Then, reservoirs on mainstream and tributaries gathered flood peaks through real-time ecological operation to create artificial ecological flood processes. Finally, by the joint operation of EII projects, the water level of artificial flood was raised, and the artificial flood was controllably introduced into irrigation districts for the precision irrigation of river valley grasslands. The rationality of ecological operation model and the feasibility of EII technology were then verified through case analysis. Results indicate that: (1) through the 5–9–13 division of ecological irrigation districts, analysis of the ecological water demand, multi-scale ecological operation, EII technology and projects, and other measures, suitable artificial floods can be created and fully introduced into ecological irrigation districts to realize the timely and appropriate irrigation of river valley grasslands; (2) in the critical ecological period in 2018, the core protected area was basically fully irrigated through EII, with an effective irrigation rate of 82.4% and a vegetation coverage of 74.8%, which basically met the ecological water demand of river valley forests and grasses; and (3) for animal husbandry, after using EII technology for grassland irrigation, the average forage yield of river valley grasslands has an increase of 25%, and the direct economic benefit has an average increase of 18.9 million yuan per year, effectively improving the economic income of local herdsmen. The research results have important theoretical and practical significance for the ecological protection and restoration of river valley vegetation.

针对生态运行和生态灌溉中存在的粗放管理问题，提出了一种新型的生态灌溉方式——生态渗透。灌溉（EII），建立了水库群结合EII的多尺度生态运行模型，用于河谷草原的灌溉和恢复。首先，通过长期生态运行获得生态时期的生态可利用水量。然后，干流和支流水库通过实时生态​​调度聚集洪峰，形成人工生态洪水过程。最后，通过EII项目的联合运行，提高人工洪水水位，将人工洪水可控引入灌区，对河谷草原进行精准灌溉。生态运营模式的合理性及可行性然后通过案例分析验证了EII技术。结果表明：（1）通过生态灌区5-9-13区划、生态需水分析、多尺度生态运行、EII技术和项目等措施，可形成适宜的人工洪水，充分利用引入生态灌区，实现河谷草原适时适度灌溉；（2）2018年生态关键期，核心保护区通过EII基本实现全灌，有效灌溉率为82.4%，植被覆盖率为74.8%，基本满足河谷森林生态需水量和草; （3）畜牧业，采用EII技术进行草地灌溉后，河谷草原牧草平均增产25%，直接经济效益年均增加1890万元，有效提高了当地牧民的经济收入。研究成果对河谷植被的生态保护与恢复具有重要的理论和现实意义。