针对山区河流珍稀特有鱼类的水力生境参数定量化困难,以及单一流量的生态需水研究难以反映天然河流生态水文过程的问题,以澜沧江上游某水电站下游分布的澜沧裂腹鱼和光唇裂腹鱼为目标物种,采用非恒定流数学模型,根据目标物种产卵场天然逐日流量过程资料,分析其产卵场在产卵期的水力学特征并构建生态水文指标体系,建立流速、水深适宜度曲线,提出流速、水深需求的适宜范围。并采用河道内流量增量法,结合生态水文指标体系,获得该水电站下泄的生态流量过程,为恢复类似流域生态系统多样性提供了参考。 According to the difficulty in quantifying hydrological habitat parameters of rare and endemic fish in mountainous rivers and the research on ecological water demand of single flow, it is difficult to reflect the problems of eco-hydrological processes in natural rivers. As the target species, using unsteady flow mathematical model, according to the natural daily flow process data of the spawning grounds of the target species, the hydraulic characteristics of the spawning ground in the spawning period were analyzed and the eco-hydrological index system was established. The flow velocity and water depth suitability curve , Put forward the appropriate range of velocity and depth requirements. In addition, the incremental flow method in the river channel and the eco-hydrological index system were used to obtain the ecological flow rate of the hydropower station, which provided a reference for restoring the ecosystem diversity in similar drainage basins.