中文摘要：

在这份报纸，在水力发电的工程和河环境之间的关系被分析。最近，由在黄河的 Ningxia 活动范围的大水力发电的工程的流量的大规模规定改变了自然流量过程，引起低分泌物和河床进化和河特征的全面调整的概率的增加。在低流动的年期间，这二个变化的联合效果能削弱自清能力并且减少水河的环境能力。这是为在 Ningxia 活动范围的水质量的最近的减少的主要原因之一。它对必要的表演实现河训练的这研究投射维持稳定的流动路径，不是仅仅为调整河政体并且为洪水，而且为增加自清能力和水控制河的环境能力。为与河环境的保护协调水力发电的工程的操作的方法和建议为了支持持续开发被介绍。

英文摘要：

In this paper, the relationship between hydroelectric projects and the river environment is analyzed. Recently, the large-scale regulation of runoff by large hydroelectric projects in the Ningxia Reach of the Yellow River has altered natural runoff processes, causing an increase in the probability of low discharge and an overall adjustment of riverbed evolution and river characteristics. During low-flow years, the combined effects of these two changes can weaken the self-purification capacity and reduce the water environmental capacity of the river. This is one of the main reasons for the recent decrease of water quality in the Ningxia Reach. This research shows that it is necessary to implement river training projects to maintain stable flow paths, not only for adjusting river regimes and for flood control, but also for increasing the self-purification capacity and the water environmental capacity of the river. Methods and proposals for coordinating the operation of hydroelectric projects with the protection of the river environment are presented in the interest of promoting sustainable development.