Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s00024-019-02271-8 http://hdl.handle.net/11449/189391 |
Resumo: | Dams are structures that barrier rivers and streams for a variety of purposes. The constant maintenance of these structures is essential, since a possible accident can lead to damage of catastrophic proportions. In November 2015 in the city of Mariana, Minas Gerais (MG), Brazil, a tailings dam burst and spilled 56 million cubic meters of tailings. In addition to victimize 19 people, the event caused material, economic and environmental damage—it is considered the largest environmental disaster of Brazil. This research presents a cheap and quickly applied alternative for investigation of seepage of water in earth dams, built with distinct embankment materials—one dam composed of predominantly silt and clay soil and the other predominantly composed of sandy soil. The research methods used were: geotechnical tests as gradation test, permeability test with the Guelph permeameter method and the application of the (DC) resistivity geophysical method from the electrical resistivity tomography (ERT) technique in Wenner array. Three ERT lines were positioned parallel to the longitudinal axis at each dam. The data are presented in 2D and 3D geophysical images with electrical resistivity values modeled. Based on the physical principle of electrolytic conduction, i.e., decrease in electrical resistance in materials or siliceous minerals in moisture conditions compared to the material in the dry state, the results revealed low-resistivity zones restricted to some points, associated with water infiltration in the transverse direction. The results indicate saturation restricted to some points and low permeability, at the present time, an installation of piping processes. |
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Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazildamselectrical resistivitygeophysicsInternal erosiontailingsDams are structures that barrier rivers and streams for a variety of purposes. The constant maintenance of these structures is essential, since a possible accident can lead to damage of catastrophic proportions. In November 2015 in the city of Mariana, Minas Gerais (MG), Brazil, a tailings dam burst and spilled 56 million cubic meters of tailings. In addition to victimize 19 people, the event caused material, economic and environmental damage—it is considered the largest environmental disaster of Brazil. This research presents a cheap and quickly applied alternative for investigation of seepage of water in earth dams, built with distinct embankment materials—one dam composed of predominantly silt and clay soil and the other predominantly composed of sandy soil. The research methods used were: geotechnical tests as gradation test, permeability test with the Guelph permeameter method and the application of the (DC) resistivity geophysical method from the electrical resistivity tomography (ERT) technique in Wenner array. Three ERT lines were positioned parallel to the longitudinal axis at each dam. The data are presented in 2D and 3D geophysical images with electrical resistivity values modeled. Based on the physical principle of electrolytic conduction, i.e., decrease in electrical resistance in materials or siliceous minerals in moisture conditions compared to the material in the dry state, the results revealed low-resistivity zones restricted to some points, associated with water infiltration in the transverse direction. The results indicate saturation restricted to some points and low permeability, at the present time, an installation of piping processes.Science and Technology Institute (ICT) Univ. Federal de Alfenas (UNIFAL), José Aurélio Vilela Highway, 11999, Cidade UniversitáriaDepartment of Applied Geology (DGA) Geosciences and Exact Sciences Institute (IGCE) Univ. Estadual Paulista (UNESP), 24-A Avenue, Bela Vista, 1515Post Graduation in Geology Univ. Federal do Paraná (UFPR), XV de Novembro Street, 1299Department of Applied Geology (DGA) Geosciences and Exact Sciences Institute (IGCE) Univ. Estadual Paulista (UNESP), 24-A Avenue, Bela Vista, 1515Univ. Federal de Alfenas (UNIFAL)Universidade Estadual Paulista (Unesp)Universidade Federal do Paraná (UFPR)Camarero, Pedro LemosMoreira, César Augusto [UNESP]Pereira, Henrique Garcia2019-10-06T16:39:10Z2019-10-06T16:39:10Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s00024-019-02271-8Pure and Applied Geophysics.1420-91360033-4553http://hdl.handle.net/11449/18939110.1007/s00024-019-02271-82-s2.0-8506881792790868573123910800000-0002-6949-6679Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPure and Applied Geophysicsinfo:eu-repo/semantics/openAccess2021-10-23T15:55:03Zoai:repositorio.unesp.br:11449/189391Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:04:43.990268Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil |
title |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil |
spellingShingle |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil Camarero, Pedro Lemos dams electrical resistivity geophysics Internal erosion tailings |
title_short |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil |
title_full |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil |
title_fullStr |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil |
title_full_unstemmed |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil |
title_sort |
Analysis of the Physical Integrity of Earth Dams from Electrical Resistivity Tomography (ERT) in Brazil |
author |
Camarero, Pedro Lemos |
author_facet |
Camarero, Pedro Lemos Moreira, César Augusto [UNESP] Pereira, Henrique Garcia |
author_role |
author |
author2 |
Moreira, César Augusto [UNESP] Pereira, Henrique Garcia |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Univ. Federal de Alfenas (UNIFAL) Universidade Estadual Paulista (Unesp) Universidade Federal do Paraná (UFPR) |
dc.contributor.author.fl_str_mv |
Camarero, Pedro Lemos Moreira, César Augusto [UNESP] Pereira, Henrique Garcia |
dc.subject.por.fl_str_mv |
dams electrical resistivity geophysics Internal erosion tailings |
topic |
dams electrical resistivity geophysics Internal erosion tailings |
description |
Dams are structures that barrier rivers and streams for a variety of purposes. The constant maintenance of these structures is essential, since a possible accident can lead to damage of catastrophic proportions. In November 2015 in the city of Mariana, Minas Gerais (MG), Brazil, a tailings dam burst and spilled 56 million cubic meters of tailings. In addition to victimize 19 people, the event caused material, economic and environmental damage—it is considered the largest environmental disaster of Brazil. This research presents a cheap and quickly applied alternative for investigation of seepage of water in earth dams, built with distinct embankment materials—one dam composed of predominantly silt and clay soil and the other predominantly composed of sandy soil. The research methods used were: geotechnical tests as gradation test, permeability test with the Guelph permeameter method and the application of the (DC) resistivity geophysical method from the electrical resistivity tomography (ERT) technique in Wenner array. Three ERT lines were positioned parallel to the longitudinal axis at each dam. The data are presented in 2D and 3D geophysical images with electrical resistivity values modeled. Based on the physical principle of electrolytic conduction, i.e., decrease in electrical resistance in materials or siliceous minerals in moisture conditions compared to the material in the dry state, the results revealed low-resistivity zones restricted to some points, associated with water infiltration in the transverse direction. The results indicate saturation restricted to some points and low permeability, at the present time, an installation of piping processes. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T16:39:10Z 2019-10-06T16:39:10Z 2019-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s00024-019-02271-8 Pure and Applied Geophysics. 1420-9136 0033-4553 http://hdl.handle.net/11449/189391 10.1007/s00024-019-02271-8 2-s2.0-85068817927 9086857312391080 0000-0002-6949-6679 |
url |
http://dx.doi.org/10.1007/s00024-019-02271-8 http://hdl.handle.net/11449/189391 |
identifier_str_mv |
Pure and Applied Geophysics. 1420-9136 0033-4553 10.1007/s00024-019-02271-8 2-s2.0-85068817927 9086857312391080 0000-0002-6949-6679 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Pure and Applied Geophysics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128456035139584 |