Application of petrophysical relationships to electrical resistivity models for assessing the stability of a landslide in British Columbia, Canada

Landslides in the Thompson River Valley, British Columbia, Canada, threaten serviceability of two railway lines that connect Vancouver to rest Canada and US. To minimise impact slope instability on vital transport infrastructure, as well terrestrial aquatic ecosystems, public safety, communities, local heritage, economy, better inform decision making, there is a need for monitoring. Since 2013, Ripley Landslide – small, slow-moving, translational landslide has been focus monitoring efforts Valley transportation corridor. In November 2017, novel Electrical Resistivity Tomography (ERT) system was installed site, providing near-real-time data collection via telemetric link. 4-Dimensional resistivity models are presented context moisture content soil suction, parameters known influence stability Valley. Here, we discuss development laboratory-based petrophysical relationships relate electrical suction directly, building developed field. The 4-D ERT were calibrated using these provide insights into complex spatial temporal variations suction. This study highlights utility geoelectrical assessing moisture-driven landslides.