What does landslide triggering rainfall mean?
August 28, 2023
August 28, 2023
Stantec Geohazards experts discuss landslide triggering rainfall at the 8th International Conference on Debris Flow Hazard Mitigation (DFHM8)
Stantec’s Dr. Rick Guthrie, Dr. Thad Wasklewicz, Graham Knibbs, Eric Hertzman, and Sanaz Imen present how landslide-triggering rainfall thresholds are often subject to both false negatives (landslides where none are expected) and false positives (no landslides despite thresholds being exceeded). Rainfall and shallow landslides relationships have been studied for the past 40+ years.
They present a well constrained probabilistic relationship between rainfall intensity and landslides that begins to quantify what the existing thresholds represent and permits an understanding of the potential impacts of different intensity storms.