The Electrical Resistivity Tomography method (ERT) is a non-invasive technique that, in addition to providing water content estimation, can also identify the formation of soil cracks, as crack formation causes directional dependence of the electrical current flow. This work investigates the potential of the ERT method for characterizing cracking of soils. Resistivity modelling has been used to simulate dry and wet soils with different crack scenarios. In all cases investigated, a crack can be distinguished from the background values due to its high resistivity value, even with 5% resistivity noise. In addition, 3D visualizations indicate the extent and depth of the simulated cracks. 2D ERT images from experimental measurements have been constructed to map artificial small scale cracks with different depths. The results demonstrate that a high resistivity anomaly associated with a soil crack can effectively be detected by resistivity measurements.
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