A comparison of three geoelectric methods in the presence of shallow
Flores, Carlos; López-moya, Armando
Instituto de Geofísica, UNAM, publicado en Geofísica Internacional, y cosechado de Revistas UNAM
dor_id: 4133492
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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra
336.#.#.b: article
336.#.#.3: Artículo de Investigación
336.#.#.a: Artículo
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351.#.#.b: Geofísica Internacional
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856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/361/389
100.1.#.a: Flores, Carlos; López-moya, Armando
524.#.#.a: Flores, Carlos, et al. (2011). A comparison of three geoelectric methods in the presence of shallow. Geofísica Internacional; Vol. 50 Núm. 4: Octubre 1, 2011; 371-399. Recuperado de https://repositorio.unam.mx/contenidos/4133492
245.1.0.a: A comparison of three geoelectric methods in the presence of shallow
502.#.#.c: Universidad Nacional Autónoma de México
561.1.#.a: Instituto de Geofísica, UNAM
264.#.0.c: 2011
264.#.1.c: 2011-10-01
653.#.#.a: heterogeneidades eléctricas someras; método TEM; método VLF; método SEV; shallow electrical inhomogeneities; TEM method; VLF method; VES method
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884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/361
001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/361
041.#.7.h: spa
520.3.#.a: Shallow variations of electrical resistivity often interfere with the interpretation of data from electric and electromagnetic surveys in terms of a 1–D subsurface. We interpret data of two resistivity (vertical electric sounding, VES, and dipole–dipole profiling) and two electromagnetic methods (very low frequency–resistivity profiling, VLF–R, and transient electromagnetic, TEM, soundings) over three shallow inhomogeneities: a metallic pipe, an outcropping granite wall, and a barbed–wire fence. By applying several of 1–D, 2–D, and 2.5–D numerical algorithms we estimate the subsurface resistivity structure, and the perturbing effect of the lateral inhomogeneities. Only in the case of the granitic wall a need for a 3–D algorithm to model the TEM data was apparent. The VLF–R method was useful as it detected the presence of inhomogeneities that might have remained unnoticed by the other methods. The VES and TEM methods turned out to be complementary in several aspects. The VES data were not affected by the conductive inhomogeneities and the shallow resistivity structure was better resolved. On the other hand, the TEM method was not affected by high contact resistances and was immune to the equivalence problem affecting the VES data. Despite its impervious paint cover, the pipe perturbed the galvanic current flow. The presence of the fence with metallic posts produced a strong VLF–R anomaly and affected the neighboring TEM soundings. The fences with wooden posts produced no anomaly.doi: https://doi.org/10.22201/igeof.00167169p.2011.50.4.151
773.1.#.t: Geofísica Internacional; Vol. 50 Núm. 4: Octubre 1, 2011; 371-399
773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI
022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169
310.#.#.a: Trimestral
300.#.#.a: Páginas: 371-399
264.#.1.b: Instituto de Geofísica, UNAM
doi: https://doi.org/10.22201/igeof.00167169p.2011.50.4.151
handle: 00fc7abe43d98e61
harvesting_date: 2023-06-20 16:00:00.0
856.#.0.q: application/pdf
file_creation_date: 2011-10-12 00:35:30.0
file_modification_date: 2022-07-04 19:37:10.0
file_creator: Flores C.
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245.1.0.b: A comparison of three geoelectric methods in the presence of shallow 2-D inhomogeneities: A case study
last_modified: 2023-06-20 16:00:00
license_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es
license_type: by-nc-sa
Flores, Carlos; López-moya, Armando
Instituto de Geofísica, UNAM, publicado en Geofísica Internacional, y cosechado de Revistas UNAM
Flores, Carlos, et al. (2011). A comparison of three geoelectric methods in the presence of shallow. Geofísica Internacional; Vol. 50 Núm. 4: Octubre 1, 2011; 371-399. Recuperado de https://repositorio.unam.mx/contenidos/4133492