Initiation and runout characteristics of partially saturated debris flows in Ohya landslide scar, Japan

A partially saturated flow, which has an unsaturated layer in its upper part, been monitored the steep initiation zones of debris flows. Understanding and runout characteristics flows is essential for predicting timing magnitude downstream Monitoring performed using time-lapse cameras water pressure sensors Ohya landslide scar central Japan allowed us to obtain data on a series flow surges from termination July 6, 2020, 13, 2021. Debris were mainly induced by repetitive mass movement sediment deposit caused overland erosion channel deposits, slides, supply banks tributaries. The excess pore was clearly higher than that Rainfall patterns, control content height likely affect