一般,河流泥沙的运动和输移常用泥沙的起动流速来解释。所谓起动流速,是指能使泥沙开始运动的流速界限;如果河流流速超过起动流速30％,则会产生河床泥沙的冲刷,这一增大了30％的流速界限称为冲刷流速。但是,对一些沙质浅滩的实地观测表 In general, the movement of river sediment and the start-up flow rate of sediment commonly used for transport are explained. The so-called starting flow rate, is the flow rate can make sediment start the movement limit; if the river flow rate exceeds the starting flow rate of 30%, it will produce river bed sediment erosion, the increase of 30% of the flow rate limit called the erosion flow rate. However, for some sandy banks of the field observation table