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Geophysical study in waste landfill localized above fractured rocks

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Author(s): César Augusto Moreira | Mônica Teixeira de Oliveira | Ariveltom Cosme da Silva

Journal: Ambiente e Água : An Interdisciplinary Journal of Applied Science
ISSN 1980-993X

Volume: 6;
Issue: 2;
Start page: 180;
Date: 2011;
Original page

Keywords: geophysics | electrical resistivity | voltage | leachate | fractures

ABSTRACT
Geophysical survey is an important method for investigation of contaminated areas used in the characterization of contrasting physical properties in the presence of pollutants. This work applied the geophysical methods of Electrical Resistivity and Self Potential in waste landfill, located in Caçapava do Sul city, RS. The landfill is located over fractured metamorphic rocks. Eight lines of electrical profiling with 288 measures of self potential were done. In addition, 83 measurements of direction and dip of fractures were taken. The application of spontaneous potential method permitted to detect the direction of groundwater flow. The electrical resistivity measurements allowed the identification of low-intensity anomalies associated with the presence of leachate. There is a relationship between anomalous zones and the directions of fractures.
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