cop_mods_00020857

Lajeunesse, E.; Devauchelle, O.; Houssais, M.; Seizilles, G.

Bedload particles entrained by rivers tends to disperse as they move downstream. In this paper, we use the erosion-deposition model of Charru et al. (2004) to describe the velocity and the spreading of a plume of tracer particles. We restrict our analysis to steady-state transport above a flat bed of uniform sediment. The transport of tracer particles is then controlled by downstream advection and particle exchange with the immobile bed. After a transitional regime dominated by initial conditions, the evolution of a plume of markers tends asymptotically towards classical advection-diffusion: its average position grows linearly with time, whereas it spreads like the square root of time.

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Lajeunesse, E. / Devauchelle, O. / Houssais, M. / et al: cop_mods_00020857. 2013. Copernicus Publications.

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