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Asymmetric Hillslope Erosion Following Wildfire In Fourmile Canyon, Colorado, Edward R. Abrahams, James M. Kaste, William Ouimet, David P. Deither Jan 2018

Asymmetric Hillslope Erosion Following Wildfire In Fourmile Canyon, Colorado, Edward R. Abrahams, James M. Kaste, William Ouimet, David P. Deither

Geology Articles & Book Chapters

Infrequent, high-magnitude events cause a disproportionate amount of sediment transport on steep hillslopes, but few quantitative data are available that capture these processes. Here we study the influence of wildfire and hillslope aspect on soil erosion in Fourmile Canyon, Colorado. This region experienced the Fourmile Fire of 2010, strong summer convective storms in 2011 and2012, and extreme flooding in September2013.We sampled soils shortly after these events and use fallout radionuclides to trace erosion on polar- and equatorial-facing burned slopes and on a polar-facing unburned slope. Because these radionuclides are concentrated in the upper decimeter of soil, soil inventories are ...