在鸭绿江整治中对山区河流弯道弯曲半径的初步探讨

Discussion on curvature radius of mountain river meanders in Yalujiang regulation

鸭绿江山区河流两侧一般受地形的约束,坡陡流急,水流线路不易改变,如果在某些河段弯道处采取单一圆弧处理,有时会较大地改变河流走向,带来较多的工程量。通过利用拉宾和里奥普提出的正弦派生曲线理论,对鸭绿江山区河流弯道情况进行分析,探讨选取山区河流弯道水流弯曲半径新的方法,采取具有变化曲率半径的正弦派生曲线来规划航道走向,起到了优化环境的作用。

Because of the terrain restriction, Yalujiang mountain river has characterstics of steep gradients and high flow velocity. In addition, flow route is usually not easy to change. If some river curvatures are improved as single curvature radius, it will make channel flow occur great change and bring large amount of works. According to sine derivative curve which is put forward by langbein W B, Leopold L B, the situation of mountain river meanders in Yalujiang is analyzed, and a new solution is selection of curvature radius of mountain river is discussed. Sine derivative curve with variable curvature radius is used to design the direction of waterway. It can optimize the surrounding environment.