Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study

In this study, we investigated the stability and reactivation of preexisting Tonghua landslide deposits in China, including the adjacent stable slope. We used an integrated approach, combining a multichannel analysis of surface waves (MASW) and electrical resistivity tomography (ERT). We used ERT to...

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Autores principales:	El-Raouf Amr Abd, Iqbal Ibrar, Meister Julia, Abdelrahman Kamal, Alzahrani Hassan, Badran Osman M.
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	earthflow geophysical approach electrical resistivity tomography pseudo-3d survey multichannel analysis of surface waves noninvasive Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/c7b49d59ff06431385d21abdace06d9c
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id	oai:doaj.org-article:c7b49d59ff06431385d21abdace06d9c
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spelling	oai:doaj.org-article:c7b49d59ff06431385d21abdace06d9c2021-12-05T14:10:49ZEarthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study2391-544710.1515/geo-2020-0310https://doaj.org/article/c7b49d59ff06431385d21abdace06d9c2021-11-01T00:00:00Zhttps://doi.org/10.1515/geo-2020-0310https://doaj.org/toc/2391-5447In this study, we investigated the stability and reactivation of preexisting Tonghua landslide deposits in China, including the adjacent stable slope. We used an integrated approach, combining a multichannel analysis of surface waves (MASW) and electrical resistivity tomography (ERT). We used ERT to determine groundwater seepage paths, weathering conditions, water content, and the depth to bedrock. High-resolution two-dimensional (2D) shear-wave velocity MASW images, on the other hand, played an essential role in detecting both horizontal and vertical compositions, disjointedness, and sliding surfaces related to lithological borders. Based on seismic models, we considered four geological layers encountered in the stable slope, including fractured (gravel) and weathered (phyllite) materials, as a sliding mass. We combined the 2D resistivity profiles obtained to create pseudo-three-dimensional ERT images to estimate water-saturated and unsaturated masses. From the tomography results, we identified different preexisting deposits, including buried arable clay deposits, old accumulated earthflow deposits, a water accumulation zone, and a fissure runoff. Based on the resistivity results, the bottom of the earthflow deposits is susceptible to water, and oversaturation can reactivate the earthflow.El-Raouf Amr AbdIqbal IbrarMeister JuliaAbdelrahman KamalAlzahrani HassanBadran Osman M.De Gruyterarticleearthflowgeophysical approachelectrical resistivity tomographypseudo-3d surveymultichannel analysis of surface wavesnoninvasiveGeologyQE1-996.5ENOpen Geosciences, Vol 13, Iss 1, Pp 1328-1344 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	earthflow geophysical approach electrical resistivity tomography pseudo-3d survey multichannel analysis of surface waves noninvasive Geology QE1-996.5
spellingShingle	earthflow geophysical approach electrical resistivity tomography pseudo-3d survey multichannel analysis of surface waves noninvasive Geology QE1-996.5 El-Raouf Amr Abd Iqbal Ibrar Meister Julia Abdelrahman Kamal Alzahrani Hassan Badran Osman M. Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study
description	In this study, we investigated the stability and reactivation of preexisting Tonghua landslide deposits in China, including the adjacent stable slope. We used an integrated approach, combining a multichannel analysis of surface waves (MASW) and electrical resistivity tomography (ERT). We used ERT to determine groundwater seepage paths, weathering conditions, water content, and the depth to bedrock. High-resolution two-dimensional (2D) shear-wave velocity MASW images, on the other hand, played an essential role in detecting both horizontal and vertical compositions, disjointedness, and sliding surfaces related to lithological borders. Based on seismic models, we considered four geological layers encountered in the stable slope, including fractured (gravel) and weathered (phyllite) materials, as a sliding mass. We combined the 2D resistivity profiles obtained to create pseudo-three-dimensional ERT images to estimate water-saturated and unsaturated masses. From the tomography results, we identified different preexisting deposits, including buried arable clay deposits, old accumulated earthflow deposits, a water accumulation zone, and a fissure runoff. Based on the resistivity results, the bottom of the earthflow deposits is susceptible to water, and oversaturation can reactivate the earthflow.
format	article
author	El-Raouf Amr Abd Iqbal Ibrar Meister Julia Abdelrahman Kamal Alzahrani Hassan Badran Osman M.
author_facet	El-Raouf Amr Abd Iqbal Ibrar Meister Julia Abdelrahman Kamal Alzahrani Hassan Badran Osman M.
author_sort	El-Raouf Amr Abd
title	Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study
title_short	Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study
title_full	Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study
title_fullStr	Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study
title_full_unstemmed	Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study
title_sort	earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: a case study
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/c7b49d59ff06431385d21abdace06d9c
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Earthflow reactivation assessment by multichannel analysis of surface waves and electrical resistivity tomography: A case study

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