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Title: The potential use of geophysical methods to identify cavities, sinkholes and pathways for water infiltration
Authors: Hussain, Yawar
Uagoda, Rogério Elias Soares
Borges, Welitom Rodrigues
Nunes, José Gustavo da Silva
Hamza, Omar
Condori, Cristobal
Aslam, Khurram
Dou, Jie
Cárdenas-Soto, Martín
Assunto:: Geofísica - metodologia
Issue Date: 14-Aug-2020
Publisher: MDPI
Citation: HUSSAIN, Yawar et al. The potential use of geophysical methods to identify cavities, sinkholes and pathways for water infiltration. Water, v. 12, n. 8, 2289, 2020. DOI: Disponível em: Acesso em: 16 jun. 2021.
Abstract: The use of geophysical characterization of karst systems can provide an economical and non-invasive alternative for extracting information about cavities, sinkholes, pathways for water infiltration as well as the degree of karstification of underlying carbonate rocks. In the present study, three geophysical techniques, namely, Ground Penetrating Radar (GPR), Electrical Resistivity Tomography (ERT) and Very Low Frequency Electromagnetic (VLFEM) methods were applied at three different locations in relation to fluvial karst, which is listed as an environmentally sensitive area in Rio Vermelho, Mambaí, Goiás, Brazil. In the data acquisition phase, the GPR, direct-current (DC) resistivity and VLFEM profiles were obtained at the three locations in the area. Data were analyzed using commonly adopted processing workflows. The GPR results showed a well-defined lithology of the site based on the amplitude of the signal and radar typologies. On the other hand, the inverted resistivity cross-sections showed a three-layered stratigraphy, pathways of water infiltration and the weathered structures in carbonate (Bambui group). The interpretation of VLFEM as contours of current density resulted from Fraser and Karous–Hjelt filters, indicated the presence of conductive structures (high apparent current density) that might be linked to the weathered carbonate and other conductive and resistive anomalies associated with the water-filled and dry cavities (cave), respectively. The results encourage the integrated application of geophysical techniques such as the reconnaissance for further detailed characterization of the karst areas.
Licença:: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Appears in Collections:GEA - Artigos publicados em periódicos
IG - Artigos publicados em periódicos

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