Effects of variable regolith depth, hydraulic properties, and rainfall on debris-flow initiation during the September 2013 northern Colorado Front Range rainstorm

Rex L Baum1, Jeffrey A. Coe2, Jason W Kean2, Eric S Jones3 and Jonathan Godt4, (1)U.S. Geological Survey, Denver, CO, United States, (2)USGS Central Region Offices Denver, Denver, CO, United States, (3)USGS, Geologic Hazards Science Center, Golden, United States, (4)USGS, Natural Hazards Mission Area, Golden, United States