Detailed landfill leachate plume mapping using 2D and 3D Electrical Resistivity Tomography - with correlation to ionic strength measured in screens

P.K. Maurya, Vinni Rønde, G. Fiandaca, Nicola Balbarini, E. Auken, Poul Løgstrup Bjerg, A.V. Christiansen

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    Abstract

    Leaching of organic and inorganic contamination from landfills is a serious environmental problem as surface water and aquifers are affected. In order to assess these risks and investigate the migration of leachate from the landfill, 2D and large scale 3D electrical resistivity tomography were used at a heavily contaminated landfill in Grindsted, Denmark. The inverted 2D profiles describe both the variations along the groundwater flow as well as the plume extension across the flow directions. The 3D inversion model shows the variability in the low resistivity anomaly pattern corresponding to differences in the ionic strength of the landfill leachate. Chemical data from boreholes agree well with the observations indicating a leachate plume which gradually sinks and increases in size while migrating from the landfill in the groundwater flow direction. Overall results show that the resistivity method has been very successful in delineating the landfill leachate plume and that good correlation exists between the resistivity model and leachate ionic strength.
    Original languageEnglish
    JournalJournal of Applied Geophysics
    Volume138
    Pages (from-to)1-8
    ISSN0926-9851
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Large scale 3D ERT
    • Landfill
    • Leachate plume
    • Ionic strength
    • Hydrogeophysics

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