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Modeling and simulation of sedimentation processes in a lowland river

Author

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  • Engelhardt, Christof
  • Prochnow, Dieter
  • Bungartz, Heinz

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.

Suggested Citation

  • Engelhardt, Christof & Prochnow, Dieter & Bungartz, Heinz, 1995. "Modeling and simulation of sedimentation processes in a lowland river," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 39(5), pages 627-633.
    • Handle: RePEc:eee:matcom:v:39:y:1995:i:5:p:627-633
    DOI: 10.1016/0378-4754(95)00127-3
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