Electrical Resistivity Tomography (ERT Survey)

Electrical Resistivity Tomography (ERT Survey) survey are performed by injecting a direct current into the ground via two electrodes and measuring the surface voltages. Resistivity, which is the inverse of conductivity, is a fundamental physical property that indicates how challenging it is to transmit an electrical current through a material. The resistivity responses of sub-surface materials can vary widely based on several factors, including saturation, ion concentration, faulting, and jointing. The measurements obtained offer insights into the direction and magnitude of current flow within the sub-surface, which can be transformed into a visual representation of sub-surface resistivity.

Electrical Resistivity Tomography (ERT Survey) survey are executed by introducing a direct current into the ground through two electrodes and measuring the voltages on the surface. Resistivity, which is the inverse of conductivity, is a fundamental physical property that indicates how difficult it is to pass an electrical current through a material. The resistivity responses of sub-surface materials can vary widely based on numerous factors, including saturation, ion concentration, faulting, and jointing. The measurements provide an indication of the direction and amount of current flow in the sub-surface, which can be processed into an image of sub-surface resistivity.