Modeling and simulation of sedimentation processes in a lowland river

Christof Engelhardt, Dieter Prochnow and Heinz Bungartz

Mathematics and Computers in Simulation (MATCOM), 1995, vol. 39, issue 5, 627-633

Abstract: Sediment load is an ecological criterion for the assessment of water quality as well as dissolved or particle-bound pollutants, governed by sediment transport. In a tidally unaffected section of the Elbe River upstream from Geesthacht a decreasing concentration of suspended particle load was observed during several measuring campaigns and for a few discharge situations. The reduction of suspended sediment seems to be caused by a selfpurification process due to particle settling. To verify this assumption the turbulent sediment transport in this Elbe River reach was simulated applying two- and three-dimensional mathematical models. The transport in rivers can be modeled by the turbulent momentum equations (Reynolds' equations) to determine the velocity field and by special convection-diffusion equations to calculate concentrations of different particle fractions each characterized by a mean settling velocity. Aside from concentration measurements for this river section a few settling velocity spectra were measured simultaneously.

Date: 1995
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Persistent link: https://EconPapers.repec.org/RePEc:eee:matcom:v:39:y:1995:i:5:p:627-633

DOI: 10.1016/0378-4754(95)00127-3

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