Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10634
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dc.date.accessioned2017-11-21T11:34:50Zen
dc.date.available2017-11-21T11:34:50Zen
dc.date.issued2017en
dc.identifier.urihttp://hdl.handle.net/2122/10634en
dc.description.abstractElectrical resistivity tomography (ERT) and magnetometric surveys are extensively used for environmental investigations of uncontrolled landfills,where the presence ofwaste with potential contaminants and metal objects requires a detailed characterization and monitoring of their subsurface location. Capacitively-coupled resistivity (CCR) measurements applied for similar environmental studies are far less used. In this study, we show the results and discuss the advantages of a combined application of ERT, CCR and magnetometric surveys applied to the characterization of the disposal site of Mt. Pagliaro, in the island of Ponza (central Italy). The survey area is located on volcanic deposits, which characterize the lowresistive geological bedrock. We acquired four CCR profiles and five ERT profiles in addition to a magnetic survey covering a total area of about 7000m2. The recovered smooth resistivity models suggest the presence of a shallow resistive layer (ρ N 75 Ωm) of variable thickness (2.0–6.0 m), overlying a relatively low-resistive layer, which we interpret as the electrical response of the volcanic bedrock. This interpretation is supported by fewshallowboreholes and field observation in the northern part of the landfill area. The magnetic maps show three suspicious dipolar magnetic anomalies, probably ascribed to the presence of a high concentration of buried ferrous waste. Several small-scale dipolar anomalies have been interpreted as due to the presence of sparse and shallow metal objects within the waste material. Due to the resistivity models smoothness, to improve the characterization of the interface between the bedrock and thewaste material we performed a statistical analysis of the resistivity data. Following the philosophy of the steepest gradient method, we found a significative change in resistivity computed on an averaged depth resistivity function of the ERT data. Accordingly, we classify two distinct units: a) an upper unit, with resistivity N75 Ωm, which we assigned to the coarse waste and dry soil materials; and b) a lower unit, with resistivity b75 Ωm, which we assigned to the volcanic deposits.We chose the 75Ωmvalue as representative of the top-bedrock\waste interface and we interpolated this boundary from both the ERT and the CCR profiles to reconstruct a smooth 3D representation of the top bedrock within the landfill area. This allowed us to evaluate the total volume of the waste material to be about 35,000 m3.en
dc.language.isoEnglishen
dc.relation.ispartofJournal of applied geophysicsen
dc.relation.ispartofseries/138 (2017)en
dc.rightsCC0 1.0 Universalen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.subjectCapacitive coupled resistivity dataen
dc.subjectElectrical resistivity tomographyen
dc.subjectMagnetometryen
dc.subjectDisposal siteen
dc.subjectPonzaen
dc.titleMultidisciplinary geophysical approach to map a disposal site: The Ponza island case studyen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber264-274en
dc.subject.INGV04.02. Exploration geophysicsen
dc.identifier.doi10.1016/j.jappgeo.2017.02.001en
dc.description.obiettivoSpecifico7A. Geofisica per il monitoraggio ambientale e geologia medicaen
dc.description.obiettivoSpecifico2TR. Ricostruzione e modellazione della struttura crostaleen
dc.description.journalTypeJCR Journalen
dc.contributor.authorSapia, Vincenzoen
dc.contributor.authorBaccheschi, Paolaen
dc.contributor.authorVillani, Fabioen
dc.contributor.authorTaroni, Matteoen
dc.contributor.authorMarchetti, Marcoen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.orcid0000-0003-1958-2314-
crisitem.author.orcid0000-0001-5383-7945-
crisitem.author.orcid0000-0001-7133-0136-
crisitem.author.orcid0000-0001-6999-4590-
crisitem.author.orcid0000-0002-9476-206X-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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