Assessment of geoelectrical configurations using reduced physical models for the structural mapping of rock mass and fractured aquifers.

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dc.contributor.authorCardoso, Luiz Henrique
dc.contributor.authorBacellar, Luis de Almeida Prado
dc.date.accessioned2022-09-14T19:35:34Z
dc.date.available2022-09-14T19:35:34Z
dc.date.issued2021pt_BR
dc.description.abstractThe identification of geological fractures is important for the solution of several geotechnical and hydrogeological problems. The electrical resistivity method has been used to identify fractures, and this research seeks the opti- mization of its application in characterizing rock mass and fractured aquifers. A reduced physical model consisting of marble plates buried in saturated sand was built inside an acrylic tank in order to simulate a frac- tured rock mass covered by saturated soil. The contacts between the plates represent two vertical fracture fam- ilies, named J1 and J2, which were respectively oriented in the NS and N60°E directions. In the comparison between the electrical arrays, the same parameters were considered, e.g. depth of investigation and number of survey lines, as well as internal and boundary conditions. The experiments were divided in stages E1 and E2. In stage E1, azimuthal surveys were carried out using Wenner, Equatorial Dipole-Dipole and Quadratic arrays. The Equatorial Dipole-Dipole array required the smallest area to relocate cables and electrodes and yielded the best results regarding the interpretation of apparent electrical resistivity ellipses and rock mass anisotropy. It was also accurate in the estimation of the fissural porosity. In stage E2, electrical profiling was carried out via the Dipole-Dipole and Gradient arrays. The latter yielded the best resolution regarding the electrical resistivity anomalies, which allowed the mapping of all fractures present in the surveyed area by means of 2D and 3D anal- yses. It is believed that these results be of relevance to the characterization of fractures in geotechnical studies and water exploration in fractured aquifers.pt_BR
dc.identifier.citationCARDOSO, L. H.; BACELLAR, L. de A. P. Assessment of geoelectrical configurations using reduced physical models for the structural mapping of rock mass and fractured aquifers. Journal of Applied Geophysics, v. 191, 2021. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0926985121001154>. Acesso em: 29 abr. 2022.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jappgeo.2021.104368pt_BR
dc.identifier.issn0926-9851
dc.identifier.urihttp://www.repositorio.ufop.br/jspui/handle/123456789/15269
dc.identifier.uri2https://www.sciencedirect.com/science/article/pii/S0926985121001154pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectElectrical propertiespt_BR
dc.subjectHydro geophysicspt_BR
dc.subjectPorositypt_BR
dc.subjectWater flowpt_BR
dc.titleAssessment of geoelectrical configurations using reduced physical models for the structural mapping of rock mass and fractured aquifers.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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