南水北调中线穿黄工程所在河段河床演变分析

Analysis of fluvial process at the river segment where the project of the central route of conveying water from Southern China to Northern China across the Yellow River

通过研究有关实测及分析资料，认为南水北调中线穿黄工程所在河段的河床演变，受其上游来水来沙条件变化及本段河床边界条件的影响很大，特别是三门峡水库兴建和改建运用以及一系列河势控导工程修建前后，该段河床演变特点也随之发生变化。此外，本文还对该段河床变化趋势，特别是对小浪底水库兴建的影响进行了预估，并介绍了模型试验中该段河床的变化情况。

Analysis of field and experimental measurements indicates that fluvial process at the river segment where the project of the central route of conveying water from Southern China to Northern China across the Yellow River is greatly affected by the incoming sediment and water from upper stream as well as the. local river boundary conditions. Especially at time before and after the construction and remodeling of the Sanmenxia Reservoir and after the construction of a series of flow directing engineering works, the characteristics of fluvial process in this segment has changed significantly. In addition, the future trend of nuvial process in this segment and especially the influence of Xiaolangdi reservoir have been predicted. This paper also introduced the situation of change observed from physical modeling.