利用沙波运动估算推移质输沙率的误差分析

The Analysis on the Error of the Equation of Bed Load Discharge Based on the Movement of Sand Waves

通过沙波运动估算推移质输沙率的方程分析,论证误差的主要来源不是推移质泥沙和悬移质泥沙之间的交换,而是由波谷附近涡流区的逆向推移造成的。涡流区的长度决定着误差的大小和正负。因此误差的大小和沉积物粒度没有直接的关系,但是和流速有关。

On discussing the equation of bed load discharge based on the movement of sand waves, the exchange between suspended sediment and bed load is not considered as an important source of the error of the equation, which it was thought to be the anti-current at the back ward position of the though of sand waves, whose length determines the error. Thus, the error of the equation depends on the current velocity but not on the size of sediment particles.