EXPERIMENTAL STUDY ON SALTATION OF SOLID GRAINS IN FLOWING WATER  

作　　者：HU Chunhong, HUI Yujia, and XIA Zhenhuan (Engineer ,Institute of Water Conservancy and Hydroelectric Power Research Professor,Department of Hydraulic Engineering ,Tsinghua University Professor,Department of Hydraulic Engineering ,Tsinghua University) 

出　　处：《International Journal of Sediment Research》1992年第2期23-51,共29页国际泥沙研究（英文版）

摘　　要：This paper deals with the saltation of bed-load solid grains in flowing water. Experiments have been carried out by means of high-speed photographing and advanced data processing techniques while the analysis is made by combined method of mechani- cal and statistical theories. Experiments reveal that saltation is the main form of the bed-load transport under ordinary flow conditions. Taking successive saltation as the model of bed-load transport, systematic analysis has been made with regard to the forces acting on grains and the variation of their magnitudes along the saltation trajec- tories to obtain the kinematic and dynamic properties of these grains. The statistical analysis shows that the probability density functions of the relative height and length of saltation are in conformity with distribution, while the probability density functions of the relative velocities of saltation are in conformity with the Gaussian distribution.This paper deals with the saltation of bed-load solid grains in flowing water. Experiments have been carried out by means of high-speed photographing and advanced data processing techniques while the analysis is made by combined method of mechani- cal and statistical theories. Experiments reveal that saltation is the main form of the bed-load transport under ordinary flow conditions. Taking successive saltation as the model of bed-load transport, systematic analysis has been made with regard to the forces acting on grains and the variation of their magnitudes along the saltation trajec- tories to obtain the kinematic and dynamic properties of these grains. The statistical analysis shows that the probability density functions of the relative height and length of saltation are in conformity with distribution, while the probability density functions of the relative velocities of saltation are in conformity with the Gaussian distribution.

关 键 词：Mechanics of sediment transport Bed load SALTATION 

分 类 号：P3[天文地球—地球物理学]