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Article dans une revue

Transfer of combined sewer overflows in the Seine river

Abstract : The understanding of transport and dispersion of combined sewer overflows (CSOs), containing both dissolved and particulate matters, is a major component of a research program dealing with the assessment of impacts of CSOs on the Seine River. This study has combined field measurements and the development of modelling tools. The first experimental results stress the fact that predictions of the behaviour of dissolved matter require the use of a fully two-dimensional hydraulic model, because the dispersion process seems to strongly depend on geometrical features of the river - meanders and the differential advection they induce. Concerning the particulate matter. it appears that different factors govern its downstream transport, namely, settling properties, critical shear stress, and vertical diffusivity. These factors may produce forces on particles of the same order of magnitude, but in opposite directions. Special experiments are needed to determine precisely how these forces combine.The understanding of transport and dispersion of combined sewer overflows (CSOs), containing both dissolved and particulate matters, is a major component of a research program dealing with the assessment of impacts of CSOs on the Seine River. This study has combined field measurements and the development of modelling tools. The first experimental results stress the fact that predictions of the behaviour of dissolved matter require the use of a fully two-dimensional hydraulic model, because the dispersion process seems to strongly depend on geometrical features of the river - meanders and the differential advection they induce. Concerning the particulate matter, it appears that different factors govern its downstream transport, namely, settling properties, critical shear stress, and vertical diffusivity. These factors may produce forces on particles of the same order of magnitude, but in opposite directions. Special experiments are needed to determine precisely how these forces combine.
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Soumis le : mardi 22 janvier 2013 - 13:10:42
Dernière modification le : samedi 7 avril 2018 - 01:18:20

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  • HAL Id : hal-00779553, version 1

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L. Simon, M.A. Maldiney, Jean-Marie Mouchel. Transfer of combined sewer overflows in the Seine river. Water Science and Technology, IWA Publishing, 1994, 29 (41306), pp.209. ⟨hal-00779553⟩

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