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dc.contributor.author
Martinelli, Hilda Patricia
dc.contributor.author
Duplaá, María Celeste
dc.date.available
2018-11-20T17:08:47Z
dc.date.issued
2008-05
dc.identifier.citation
Martinelli, Hilda Patricia; Duplaá, María Celeste; Laterally filtered 1D inversions of small-loop, frequency-domain EMI data from a chemical waste site; Society of Exploration Geophysicists; Geophysics; 73; 4; 5-2008; 143-149
dc.identifier.issn
0016-8033
dc.identifier.uri
http://hdl.handle.net/11336/64741
dc.description.abstract
We made a study in the backyard of an agrochemical plant using a small-loop, frequency-domain electromagnetic induction (EMI) system. Such systems are very sensitive to conductive structures buried at shallow depths. Frequently, they are only used to locate and delimit these structures by direct observation of data. However, much more information can be obtained by applying numerical modeling techniques to the data. First we mapped an anomalous zone that indicates the possible presence of buried waste or some other underground contamination by visualizing data. Then we applied a 1D inversion method to the data from this zone. By joining 1D inversion results, this method builds 2D images of the subsoil structure below survey lines. Because the code applies smoothness constraints to the 1D inversions, the subsoil properties in these 2D images change gradually with depth. The code does not impose any correlation between the data or 1D models corresponding to neighboring points, so sharp lateral changes can appear. Several of them do not represent real features of the subsoil. We designed and applied two spatial filters to smooth the spurious lateral variations in our models. One correlates the data acquired at adjacent points prior to inversions. The other applies an analogous correlation to the inverse models obtained from the original data. Both filters greatly improve the quality of the 2D images. Compiling these results, we obtained a 3D model of the subsoil that characterizes the anomalous structure. Excavations made later at the site confirmed the results. © 2008 Society of Exploration Geophysicists. All rights reserved.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Society of Exploration Geophysicists
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Spatial Filtering
dc.subject
Electromagnetic Induction
dc.subject
Inversion
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Industrial Plants
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Laterally filtered 1D inversions of small-loop, frequency-domain EMI data from a chemical waste site
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-12T18:35:25Z
dc.journal.volume
73
dc.journal.number
4
dc.journal.pagination
143-149
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Tulsa, OK
dc.description.fil
Fil: Martinelli, Hilda Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.description.fil
Fil: Duplaá, María Celeste. Ministerio de Ciencia. Tecnología e Innovación Productiva. Agencia Nacional de Promoción Cientifíca y Tecnológica; Argentina
dc.journal.title
Geophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1190/1.2917197
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