造床流量法中变指数m值的确定

Determination of parameter m in method of bed-building discharge

通过对造床流量法变指数值的确定方法进行研究,并结合长江中游周天河段的水流泥沙特性,分析不同方法确定下的m值对该河段造床流量确定的影响,表明变指数m对使用造床流量法确定河段的造床流量影响较大,因而必须慎重确定。

The paper studies the method of determining parameter m of bed-building discharge,analyses the influence of m determined by different methods to bed-building discharge,the result indicates that the parameter m determined by the bed-building discharge method has a large influence to the bed-building discharge in the studied river stream,the parameter m has to be determined with great care.