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  1. No Access

    Article

    Evaluation of VOC fluxes at the soil-air interface using different flux chambers and a quasi-analytical approach

    Dense nonaqueous-phase liquids (DNAPLs) spilled on the soil migrate vertically depending upon gravity and capillary forces through the unsaturated zone of the porous aquifer, forming a vapour plume. These vola...

    Solenn Cotel, Gerhard Schäfer, Sylvie Traverse… in Water, Air, & Soil Pollution (2015)

  2. No Access

    Article

    Highly gravity-driven flow of a NAPL in water-saturated porous media using the discontinuous Galerkin finite-element method with a generalised Godunov scheme

    In this paper, we develop an implementation of gravity effects within a Global Pressure formulation in a numerical scheme based on the implicit pressure explicit saturation (IMPES) approach. We use the Discont...

    Lauriane Schneider, Raphaël di Chiara Roupert, Gerhard Schäfer… in Computational Geosciences (2015)

  3. No Access

    Article

    Prediction of Vertical DNAPL Vapour Fluxes in Soils Using Quasi-Analytical Approaches: Bias Related to Density-Driven and Pressure-Gradient-Induced Advection

    This study focuses on a detailed analysis of the errors introduced by two quasi-analytical approaches based on either Fick’s first law or a combination of Fick’s and Darcy’s laws to evaluate the vapour flux of...

    Salsabil Marzougui, Gerhard Schäfer, Lotfi Dridi in Water, Air, & Soil Pollution (2012)

  4. No Access

    Article

    Large Scale Experiment on Transport of Trichloroethylene in a Controlled Aquifer

    Pollution by dense non-aqueous phase liquids (DNAPLs) represents a major threat to groundwater resources. In a real case of site contamination, the efficiency of remediation techniques is often limited by a la...

    Salah Jellali, Paul Muntzer, Olivier Razakarisoa… in Transport in Porous Media (2001)

  5. No Access

    Article

    Surfactant Enhanced In Situ Remediation of LNAPL Contaminated Aquifers: Large Scale Studies on a Controlled Experimental Site

    A central problem in a real case remediation of an oil contaminated site is the knowledge of the volume and the extent of the pollution. As the estimation of the mass balance, usually based on some point measu...

    Mehdi bettahar, Jean Ducreux, Gerhard Schäfer… in Transport in Porous Media (1999)