天然河流沙质河床上器测推移质输沙率含义的商榷

 作者基于天然河流沙质河床上的推移质和悬移质两类运动形式的泥沙,不存在一个能够截然划分的界面,认为在沙质河床上利用推移质采样器实测的推移质输沙率,其组成不都是推移质泥沙,其中尚包括悬移质中的床沙质泥沙。为此,本文分析了长江中游干流宜昌和汉口水文站河段利用推移质采样器实测的推移质输沙率和与之相应测次的、按测时水沙条件计算的临底流层内悬移质中床沙质泥沙输沙率的相关关系,论证了沙质河床上器测推移质输沙率中推移质泥沙和悬移质中床沙质泥沙组成的机理。

Discussion on the Meaning of the Bed Load Discharge Measured by Sampler in the Sandy Bed of Natural Rivers

In view of the fact that there is no clear line of demarcation between the motions of bed load and suspended load in the sandy bed, the writer considers that the composition of the bed load discharge, which is measured by sampler,consists of not only the bed load but also the bed material load in suspended sediment. In this paper,the relationship has been analysed between the field data of the bed load discharge measured by sampler and the suspended bed material load discharge at the bottom course which is computed corresponding to the field data of the bed load discharge. From the above analysis, views on the mechanism of the bed load discharge measured by sampler are presented.