Estimation of Volume Water Content Using an Electrical Resistivity Survey for Monitoring Shallow Landslides

In recent times, shallow landslides have occurred at many locations in Japan. One cause of shallow landslides is a drop in effective stress due to rainwater penetration into the ground. It is therefore important to understand the behavior of water in the ground. In this study, the estimation of volume water content was carried out using a resistivity survey based on the results of a field survey. These results indicate that the relationships between ground temperature and specific resistivity are different in each range in volume water content. It is necessary to correct the specific resistivity using underground temperature. As a result of the correction, this study shows that it is possible to estimate volume water content from resistivity.