Electric Resistivity Tomography (ERT) is a non-invasive geophysical method used to map subsurface conditions by measuring the electrical resistivity of soils and rocks. It provides a two- or three-dimensional image of the underground layers, making it an essential tool for geological, geotechnical, environmental, and groundwater studies. ERT is particularly useful for identifying variations in soil composition, detecting voids, groundwater levels, contamination zones, and rock interfaces.
Key aspects include: