Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/208288
Imaging leachate runoff from a landfill using magnetotellurics: The Garraf karst case
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Electrical and active source electromagnetic geophysical methods have been traditionally employed to approach and tackle environmental problems, such as those caused by landfills. However, since these problems are more consequential and cover broader areas, it is necessary to use deeper penetration methods, such as magnetotellurics. In the Garraf Massif (Catalan Coastal Ranges, NE Spain), an urban waste disposal landfill had been in operation from 1974 to 2006, during which more than 26 million metric tons of garbage had been deposited. This landfill overlies karstic terrain, thus principally impacting groundwater circulation. Previous electrical resistivity tomography profiles had partially imaged the infill but were not able to penetrate below the base of the original landfill. During 2019 and 2020 we performed a magnetotelluric study over the landfill and its surrounding with the goals of characterizing the electrical resistivity of the infill and below it. The 2D and 3D resistivity models confirmed the highly conductive nature of the leachate and allowed us to identify its presence below the landfill base, which we quantified with maximum thicknesses of 90 m. This proved that landfill leachate had filtered through the original impermeable layer, enhanced by the karstic drainage structure.
Matèries (anglès)
Citació
Citació
MARTÍ I CASTELLS, Anna, QUERALT I CAPDEVILA, Pilar, MARCUELLO PASCUAL, Alejandro, LEDO FERNÁNDEZ, Juanjo, MITJANAS COLLS, Gemma, PIÑA-VARAS, Perla, FREIXES, A., SOLÀ, Judit, PONS, P., LÓPEZ, J.. Imaging leachate runoff from a landfill using magnetotellurics: The Garraf karst case. _Science of the Total Environment_. 2024. Vol. 920. [consulta: 24 de gener de 2026]. ISSN: 0048-9697. [Disponible a: https://hdl.handle.net/2445/208288]