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ETH : Multiscale Approach in Heterogeneous Media

par Eric Eusebe - publié le , mis à jour le

Team Leader :

Vincent GUINOT

Team members:

Some publications

Keywords :

Heterogeneous media, regionalisation, fractured/karst aquifers, urban hydraulics, unsaturated zone

Research summary

What do a karst aquifer, a flooded street network in a major city, a coastal lagoon, and soil covered with vegetation have in common ?
Although very different from each other at first sight, these four objects share a common feature : the very heterogeneous nature of flow paths and contaminant transfer patterns. Within the same medium, very fast transfer zones (karst conduits, city street networks, root paths, artificial and natural channels in the Camargue lagoons) are entwined with slow flow regions ( porous rock matrix, inner yards, city parking lots, marsh zones in lagoons). Fast transfer regions usually have strongly anisotropic geometries (conduits, channels, etc.) and may extend over long distances, while slow transfer regions usually tend to be isotropic.

A karst aquifer, a flooded city street network and the vadose zone have in common the presence of multiple regions where flow processes occur on strongly contrasting space and time scales. These regions are in constant interaction and exchange mass, momentum and energy. The ETH research team studies these transfer and exchange mechanisms. Two main research themes can be identified :

  • Flood modelling over complex geometry and topography (e.g. densely urbanised areas, coastal lagoons, urban drainage networks with partially unknown geometric features),
  • Modelling water, contaminant and energy transfer in soils, from the scale of 1m to several km (karst watersheds, fractured aquifers, vadose zone, porous media).

current projects

AMMA-Catch (B. Cappelaere, J. Demarty) - Analyse Multidisciplinaire de la Mousson Africaine - Couplage de l’Atmosphère Tropicale et du Cycle Hydrologique. Le site AMMA-Catch
Cart’Eaux (C. Delenne) – applications de la télédétection pour la caractérisation des propriétés des réseaux de drainage urbain.
GeRIMU / Gestion du Risque d’Inondation en Milieu Urbain (V. Guinot) – Outils numériques de simulation multi-échelle des inondations urbaines d’origine pluviale à l’échelle de l’agglomération.
HPMS-Ca (H. Jourde, V. Guinot) – Caractérisation des propriétés hydrodynamiques des aquifères carbonatés.