黄河下游裁弯工程水沙动力学原理研究

黄河下游裁弯工程水沙动力学原理研究,借助实测资料及模型试验研究成果,分析了黄河的水沙特性和弯道的水流特性,研究了引河的分流分沙问题。研究表明,水沙条件是影响引河冲淤发展的主要因素之一,实施裁弯工程时,水沙条件的选取一定要符合黄河的水沙特性和弯道的水流特性,同时尽可能选取利于引河发展的水力条件。

Study on water and sediment dynamics principle of cut-off works for lower Yellow River

Based on the measured data and the experimental results of physical model,the water and sediment characteristics and the flow characteristics of the bend reach of the lower Yellow River are analyzed for the study on the dynamics principle of the water and sediment for the cut-off works to be constructed therein,and meanwhile,the flow and sediment diversion is studied as well.It is showed that,the water and sediment condition is one of the key factors to affect the scouring and deposition development of the approach channel.During the construction of the cut-off works,the water and sediment conditions must be selected to meet the requirements of both the water and sediment characteristics of the Yellow River and the flow characteristics in bend reach.At the same time,the hydraulic condition for the evolution of the approach channel must be chosen as favorable as possible.