Abstract: Solute transport in natural streams is a complex phenomenon that involves both in-stream dispersion and mass exchange with the porous zones surrounding the water body. Due to the complex nature of the riverine systems ...

Abstract: Two contrasting mechanisms, created by channel curvature which strongly affect longitudinal dispersion of solutes in rivers are examined. In natural channels the large cross-sectional variability of the primary velocity ...

Abstract: Surface bed-material sampling by grid methods produces particle frequency distributions that are not directly applicable to sediment-transport models. Appropriate conversion models are required to turn these distributions ...

Abstract: Commonly applied procedures for the evaluation of surface bed-material composition in rivers often include collection of particles by wax or adhesives. These collection procedures produce particle frequency distributions ...

Abstract: The transient storage model (TSM) is the most commonly used model for stream–subsurface exchange of solutes. The TSM provides a convenient, simplified representation of hyporheic exchange, but its lack of a true physical ...

Abstract: The temporal development of clear-water local scour depth at bed sills in uniform gravel beds is considered. Experiments are presented on the development of scour holes under unsteady hydraulic conditions, with the ...

Abstract: A new sampling technique called wax coring is presented in this paper that enables the determination of the composition of the surface and subsurface of a sediment bed formed during flume experiments. A wax-impregnated ...

Abstract: The effect of the flood recession time on the local scour depth at bed sills in gravel deposits is examined. Experiments were carried out to study the development of scour holes under time-varying hydraulic conditions with ...