黄河下游漫滩洪水调控模式研究

针对漫滩洪水特性提出了改善黄河下游“二级悬河”的方案，应用动床模型试验对改善方案进行了模拟研究。结果显示：控制漫滩可以有效的减缓“二级悬河”的发展，加大主槽累计冲刷量，减小滩区淹没面积及改善河道横比降。如果黄河下游遭遇大漫滩洪水，可以在控制漫滩条件下排放最大洪峰流量不超过10 000 m3/s的过程洪水。

Study on mode of regulation and control of overbank flood for Lower Yellow River

In accordance with the characteristics of the overbank flood, a scheme for improving the secondary suspended river of the lower Yellow River is put forward herein, and then a simulative study is made on the improvement scheme based on the movable-bed model test. The result shows that the control of the overbank of flood can effectively alleviate the evolution of the secondary suspended river, enlarge the accumulated sediment erosion of the main channel, reduce the inundated area of flood plain and improve the transverse gradient of river channel. If a major overbank flood is encountered along the Lower Yellow River, the flood with the process of the maximum peak flow less than 10 000 m3/s can be discharged under the condition of the controlled overbank of the flood.