黄河小北干流河段揭河底规律分析

“揭河底”现象是黄河高含沙洪水特有的一种泥沙运动方式.本文通过对历史“揭河底”水文资料的统计和分析,提出了历史“揭河底”发生的水沙条件、河道边界条件、河床淤积物组成,总结了其发生的规律.该研究进一步探讨了黄河小北干流河段“揭河底”冲刷现象的运动机理,充分发挥冲刷塑造窄深河槽的积极作用,减小了冲刷造成的危害,对在治黄中如何利用“揭河底”规律,趋利避害有一定的指导意义.

Rule analysis of river bottom tearing in the Xiaobeiganmain stream of the Yellow River

"Bottom tearing" phenomenon is a unique way of sediment movement that high concentrated sediment flood possesses in the Yellow River.Based on the historical" bottom tearing" hydrological data statistics and analysis,the paper put forward the historical" bottom tearing " occurred in the water and sediment conditions,boundary conditions of river channels,channel deposit,and summarized its occurrence regularity.The study further explored bottom tearing scouring phenomenon" movement mechanism in Xiaobeigan main stream of the Yellow River",fully play its positive effect of the "bottom tearing scour shaping" narrow and deep channel,reduced its scour harm and have certain guidance meaning for treating the Yellow River in how to use "bottom tearing" law,draw on the advantages and avoid disadvantages.