淮河入流对长江水流的影响分析

通过模型试验,研究长江不同流量遭遇淮河不同流量时长江沿程水位和局部流场的变化。多组水文条件下模型试验结果的分析表明:淮河入流造成长江水域局部水位壅高较多,对长江行洪不利;入流口以上流速减小会加剧洪水期泥沙的落淤,特别会影响三益桥航道的畅通;入流口以下流速增大,近岸流速的增大对长江护岸工程不利。模型试验结果可为扬中河段进口段的河床演变分析以及三益桥航道浅滩成因分析等提供参考依据。

Effect of inflow from Huaihe River on the Yangtze River

A study is performed on the effect of inflow from the Huaihe River on the water level along the river and local flow field of the Yangtze River.Based on groups of hydrological model tests,it is demonstrated that the inflow from the Huaihe River will cause the water level to increase in some reaches of the Yangtze River,which will adversely affect flood discharge,and the decrease of flow velocity above the confluence will intensify sediment deposition during the flood period,and the increase of flow velocity below the confluence will be unfavorable to the Yangtze River bank protection project.The model test results provide some references for the analysis of river-bed evolution at the inlet of the Yangtze River and the formation of shallow beach at the Sanyiqiao channel.