Details of the abstract
Title of paper | Characterization of a landfill using magnetotellurics: the Garraf case |
List of authors | Martí, A., Queralt, P., Marcuello, A., Ledo, J., Mitjanas, G., Piña-Varas, P., Freixes, A., Solà, J., Pons, P. |
Affiliation(s) | Institut Geomodels. Universitat de Barcelona, Institut Geomodels. Universitat de Barcelona, Institut Geomodels. Universitat de Barcelona, Physics of the Earth and Astrophysics. Faculty of Physics. Universidad Complutense de Madrid. Spain, Institut Geomodels. Universitat de Barcelona, Institut Geomodels. Universitat de Barcelona, Geoservei Projectes I Gestio Ambiental SL. Spain, Geoservei Projectes I Gestio Ambiental SL. Spain, Geoservei Projectes I Gestio Ambiental SL. Spain |
Summary | Landfills are a highly environmental impact solution to waste disposal. In the Garraf Massif (Catalan Coastal ranges, SE Spain), a urban waste disposal landfill had been in operation between 1974 and 2006, where more than 26 milions of metric tonnes were deposited. This landfill was projected over a karstic terrain, which had important consequences over the underwater circulation system, among others. ERT profiles were acquired and imaged part of the infill and relevant pipes and man-made impermeabilization layers but were not able to penetrate below the landfill original vase. In 2019 and 2020 we performed a MT study over the landfill and its surrounding, with the goals of characterizing the electrical resistivity of the infill and imaging the electrical structures below the original topography previous to the landfill operations. The 2D and 3D resistivity models confirmed the highly conductive nature of the leachates and allowed us to quantify the depth below which it had penetrated below the original vase, proving the filtrations produced through the original permeabilizations, enhanced by the karstic rocks. |
Session Keyword | 3.0 Exploration, Monitoring and Hazards |
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