地质构造对黄河下游悬河稳定性的控制作用

Control Function of Geologic Structure to the Stability of Elevated Section of the Lower Yellow River

在区域环境地质调查的基础上,从区域地质构造格局和活动性研究入手,分析了影响黄河下游悬河稳定的各种地质因素对悬河稳定性的控制作用,结果表明:济源—开封凹陷和东明断陷是形成黄河悬河的重要地质因素,该河段悬河稳定性最差;缓慢上升的鲁西中台隆加剧了悬河的形成;穿黄、邻黄的深、大活动性断裂与黄河的交切部位是悬河最不稳定的地段,也是险工集中分布的部位和历史上最容易决口改道的河段。

The paper analyzes the influence of various geological factors that affect the stabilization of elevated section of the lower Yellow River to the control function of stability of elevated section starting with the pattern of regional geological structure and activity based on geological survey of regional environment.The outcomes show that Jiyuan-Kaifeng undercutting and Dongming rift are an important geological factor to form the elevated section of the Yellow River and where the stability is the worst;slow rising of the platform in central and west Shandong has aggravated the formation of the elevated river and;the intersect section of deep and big active faults that cross over and near the Yellow River with the river is the most unstable part of the section and where also is the section with concentrated vulnerable spots and the most easy break and avulsion part in history.