Electrical Resistivity Imaging (ERI) surveys provide a non-invasive and efficient approach to collect detailed information regarding the depth and volume of subsurface structures through electrical measurements conducted at the Earth's surface. This technique enables the precise analysis of a diverse range of subsurface features. An assortment of electrodes is strategically positioned on the Earth's surface, and subsequently, electrical current is applied. The variations in the current transmitted are meticulously recorded. By adjusting the spacing and positioning of the electrodes, it becomes feasible to measure changes in soil resistivity beneath the Earth's surface, thereby tracking these variations in terms of depth and location. The applications of this method are extensive, ranging from mineral exploration and monitoring of groundwater flow to archaeological investigations and the evaluation of voids in areas rich in clay, where Ground Penetrating Radar (GPR) is not effective. With the appropriate equipment and survey design, this technique can be employed swiftly and comprehensively, providing valuable insights into both shallow and deep soil conditions.
Benefits:
Vast areas can be thoroughly examined In-depth analysis of soil conditions can be conducted.
These methods are both non-destructive and non-invasive.
They are also portable and environmentally benign.
These techniques can augment the outcomes of prior electromagnetic induction (EMI) surveys.
