孔兑入汇角度对黄河内蒙古段河道冲淤的影响

选取黄河内蒙古河段典型支流毛不拉孔兑为研究对象,对其来水来沙特性进行了讨论。选取典型水沙过程,采用模型试验手段,在同样水沙条件下,分别模拟了孔兑水沙在现状条件和切滩导流条件下对干流河道冲淤变化的影响。结果表明:改变支流入汇角度能有效改善黄河下游干流河段局部淤堵的状况,但同时对下游河道的淤积影响范围也相应增大。

Influence of Branch Inflow Angle to the Erosion and Deposition for Inner Mongolia Reach of the Yellow River

The typical branch of Maobula in Inner Mongolia reach of the Yellow River was taken as a research object and discussed its characteristics of discharge of the water and sediment.Typical flow and sediment process was selected and model test method was used.In the same branch flow and sediment conditions,two working conditions were simulated,inflow of Inner Mongolia reach of the Yellow River in current situation and river cut-off scheme were adopted to change flood inflow angle.Comparation and analysis influence of flood scour and deposit trunk channel.Local deposition of trunk channel was eased effectively after branch inflow angle were changed which was condisered.But at the same time,the influence area by deposition of downstream channel was lager.