Étude expérimentale de l'érosion de contact à une interface granulaire
| Autor: | Rémi Beguin, Yves-Henri Faure, Pierre Philippe |
|---|---|
| Přispěvatelé: | Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Ouvrages hydrauliques et hydrologie (UR OHAX), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Irstea Publications, Migration |
| Předmět: |
[SDE] Environmental Sciences
Groundwater flow Flow (psychology) 0211 other engineering and technologies 0207 environmental engineering Soil science 02 engineering and technology Particle image velocimetry [SDE]Environmental Sciences Erosion Internal erosion Soil horizon Spatial variability 020701 environmental engineering Porous medium Geology 021101 geological & geomatics engineering |
| Zdroj: | ResearcherID IWBDG 2011 9th International Workshop on Bifurcation and Degradation in Geomaterials, Porquerolles Island, France, 23-26 May 2011 IWBDG 2011 9th International Workshop on Bifurcation and Degradation in Geomaterials, Porquerolles Island, France, 23-26 May 2011, May 2011, Porquerolles, France. pp.131-136 Advances in Bifurcation and Degradation in Geomaterials ISBN: 9789400714205 |
| Popis: | International audience; Contact erosion appears at the interface of two soil layers submitted to a groundwater flow. Particles of the finer soil are eroded by the flow and transported through the pores of the coarser layer. Fluvial dykes are often exposed to this phenomenon. Small-scale experi-ment combining Refractive Index Matching medium, and Particle Image Velocimetry were realized to measure the flow characteristics close to the interface between a porous medium and a sandy layer. Distributions of velocities and shear-stresses were obtained. They underline the spatial variability of stress exerted by the flow onto the fine soil which is in direct relation with the variability of the pores geometry. These distributions can be helpful to better model contact erosion by going beyond the simple use of global mean values, like Darcy velocity, as usually proposed in the litterature. |
| Databáze: | OpenAIRE |
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