Rainfall threshold for debris flow occurrence in the Gadria catchment, eastern Italian Alps

Critical rainfall thresholds for shallow landslides and debris flows are widely used in warning systems based on precipitation measurement and may contribute to understanding the hydrometeorological controls on these instability processes under different climate and geomorphic conditions. In this work, we present the analysis of rainfall triggering debris flows from 2011 to 2018 in the instrumented catchment of Gadria Creek (Venosta Valley, South Tyrol, Eastern Italian Alps).