In steep rivers, sediment is often transported over immobile cobbles and boulders. Previous
studies of such conditions have observed that the entrainment rate of the mobile sediment …

This work performed for the research describes in this dissertation concerns particle
entrainment in two common particle-fluid flows in nature: 1) bedload transport in rivers, and …

Bed load sediment transport is typically formulated as a nonlinear function of the shear
stress exerted on the bed in excess of a critical value. However, due to the inherent spatial …

In mountain rivers, bed forms, large relatively immobile grains, and bed texture and
topographic variability can significantly alter local and reach‐averaged flow characteristics …

In mountainous rivers, large relatively immobile grains partly control the local and reach‐
averaged flow hydraulics and sediment fluxes. When the flow depth is similar to the size of …

Experiments were undertaken to study the nature of granular interaction in running water by
examining the influence of fine grain inputs to a coarser sediment bed with a mobile surface …

Despite several decades of investigations, accounting for the effect of the wide range of
grain sizes composing the bed of rivers on bedload transport remains a challenging …

Sediment transport in cobble‐boulder rivers consists mostly of fine sediment moving over a
coarse, immobile bed. Transport rate depends on several interrelated factors: boundary …

It is universally accepted that the turbulent flow environment generated within a gravel-bed
river will have a crucial role in sedimentation processes. Unfortunately, as the underlying …

Data from laboratory flumes and natural streams show that the critical Shields stress for
initial sediment motion increases with channel slope, which indicates that particles of the …