Case study: a 3D resistivity and induced polarization imaging from downstream a waste disposal site in Brazil
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Data
2012-06-01
Autores
Ustra, Andrea Teixeira
Elis, Vagner Roberto
Mondelli, Giulliana
Zuquette, Lazaro Valentin
Giacheti, Heraldo Luiz [UNESP]
Título da Revista
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Editor
Springer
Resumo
A contaminated site from a downstream municipal solid waste disposal site in Brazil was investigated by using a 3D resistivity and induced polarization (IP) imaging technique. This investigation purpose was to detect and delineate contamination plume produced by wastes. The area was selected based on previous geophysical investigations, and chemical analyses carried out in the site, indicating the presence of a contamination plume in the area. Resistivity model has successfully imaged waste presence (rho < 20 Omega m), water table depth, and groundwater flow direction. A conductive anomaly (rho < 20 Omega m) outside wastes placement was interpreted as a contamination plume. Chargeability model was also able to imaging waste presence (m > 31 mV/V), water table depth, and groundwater flow direction. A higher chargeability zone (m > 31 mV/V) outside wastes placement and following conductive anomaly was interpreted as a contamination plume. Normalized chargeability (MN = m/rho) confirmed polarizable zone, which could be an effect of a salinity increase (contamination plume), and the clay presence in the environment.
Descrição
Palavras-chave
3D inversion, Induced polarization, Resistivity, Chargeability, Normalized chargeability, Waste disposal site, Contamination plume
Como citar
Environmental Earth Sciences. New York: Springer, v. 66, n. 3, p. 763-772, 2012.