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 Jones2 and Jonathan Godt3, (1)U.S. Geological Survey, Denver, CO, United States, (2)USGS Central Region Offices Denver, Denver, CO, United States, (3)USGS, Natural Hazards Mission Area, Golden, CO, United States