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Learn more about the Electroresistivity method

In geoelectrical investigation, one of the main electrical properties highlighted is electroresistivity, which refers to the difficulty that electric current encounters when propagating in a medium. In rocks, the mechanisms of current propagation can be electronic, related to the transport of electrons in the rock matrix, or ionic, related to the displacement of ions present in water in pores and fissures. 

Electroresistivity data can be presented in several ways, such as profiles, sections, pseudo-sections and plans of isovalues of apparent resistivities. This variety of representations contributes to a more comprehensive understanding of the electrical characteristics of the investigated medium, offering valuable insights into the composition and structure of soil/rocks in an indirect way from the subsurface.


What are the Main Applications of Electroresistivity?

It is possible to obtain the distribution of electrical resistivity below the surface through three data acquisition techniques that are applied in different work contexts: Vertical Electrical Probing, Electric Walking/Electrical Tomography and Electrical Profiling. Understand the main applications below:

  • Identify caves and cavities in the subsoil in advance, without the need for excavation;

  • Detect geotechnical changes in the subsurface, such as saturated zones, expansive clays, or fractured rock materials;

  • Evaluate the stability of slopes in dams, which can help in the identification of areas at risk of landslides or collapses;

  • Determine the thickness and depth of soil and sound rock;

  • Assist in the creation of geotechnical models that aid in decision-making and planning.

If you are looking for a company specialized in this geophysical method, contact us and count on our experts to help you!

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