Transport of Gravel and Sediment Mixtures 3.1 Fluvial Phenomena Associated with Sediment Mixtures

When ASCE Manual No. 54, “Sedimentation Engineering,” was first published in 1975, the subject of the transport and sorting of heterogeneous sediments with wide grain size distributions was still in its infancy. This was particularly true in the case of bedload transport. The method of Einstein (1950) was one of the few available at the time capable of computing the entire grain size distribution of particles in bed-load transport, but this capability had not been extensively tested against either laboratory or field data. Since that time there has been a flowering of research on the subject of the selective (or non-selective) transport of sediment mixtures. A brief attempt to summarize this research in a useful form is provided here.