Research on Internal Structure and Mechanism of Landslide Based on Hydrogeophysical Investigation (Quan’an Landslide, Southwest China)

Figure 10

Working principle of the electric resistivity tomography. When the current propagates through underground, due to different lithology and fracture development in the underground space, the formation resistivity at different locations in the underground space is as shown by ρ1, ρ2, and ρ3. The current density is also different, as shown in the dense and sparse distribution of current schematic lines. The resistivity value was calculated through the collected potential difference (ΔUMN), after which the geological anomaly was divided through the resistivity value to realize the spatial display of geological information.