永定河军庄—三家店河段整治方案的试验研究

Investigation by model experiment on the regulation schemes of Junzhuang to Sanjiadian reach on the Yongding River

通过物理模型试验分析军庄—三家店河段的水流、泥沙运动,研究河床演变规律。定床试验给出了分汊河道的分流比及分流点,不同频率洪水的水位、流速、流态、流势。动床试验分析遭遇20年、50年洪水河道的冲淤演变规律,为该河段的河道整治提出相应的建议。

By modeling water flow and sediment transport, research on river bed changes has been made in the Junzhuang to Sanjiadian river reach on Yongding River where the main flow bifurcates into two streams. Through immovable bed model tests, the flow characteristics and the influences of flood discharge with different recurring periods on water level, flow velocity, bifurcating location of the main flow and the ratio of the bifurcated streams have clearly displayed. Bed changes in case of 20- and 50-year floods have also been analyzed by movable bed tests. Some suggestions to the regulation scheme have been made.