Combination of Rainfall Thresholds and Susceptibility Maps for Dynamic Landslide Hazard Assessment at Regional Scale
Citation
Segoni, S., Tofani, V., Rosi, A., Catani, F., Casagli, N. (2018). Combination of Rainfall Thresholds and Susceptibility Maps for Dynamic Landslide Hazard Assessment at Regional Scale. Frontiers in Earth Science, 6: 85. Link to paper
Abstract
The authors present an integrated methodology combining rainfall thresholds with susceptibility mapping to assess landslide hazard dynamically at regional scales. Rather than relying solely on rainfall thresholds for temporal forecasting with coarse spatial resolution or static susceptibility maps alone, the approach merges both datasets through a hazard matrix. Applied to Northern Tuscany, the system classifies hazard into five categories (H0-H4) based on susceptibility levels and rainfall intensity-duration combinations. Key advantages include improved spatial targeting of expected landslide locations and refined warning system resolution, enabling more effective resource allocation for hazard management at regional scales.