%AAbrahams, Edward [Department of Geology The College of William &, Mary Williamsburg VA USA]%AAbrahams, Edward [Department of Geology; The College of William & Mary; Williamsburg VA USA]%AKaste, James [Department of Geology; The College of William & Mary; Williamsburg VA USA]%AKaste, James [Department of Geology The College of William &, Mary Williamsburg VA USA]%AOuimet, William [Geography and Center for Integrative Geosciences University of Connecticut Storrs CT USA]%AOuimet, William [Geography and Center for Integrative Geosciences; University of Connecticut; Storrs CT USA]%ADethier, David [Department of Geosciences Williams College Williamstown MA USA]%ADethier, David [Department of Geosciences; Williams College; Williamstown MA USA]%BJournal Name: Earth Surface Processes and Landforms; Journal Volume: 43; Journal Issue: 9; Related Information: CHORUS Timestamp: 2023-09-17 13:56:47 %D2018%IWiley Blackwell (John Wiley & Sons) %JJournal Name: Earth Surface Processes and Landforms; Journal Volume: 43; Journal Issue: 9; Related Information: CHORUS Timestamp: 2023-09-17 13:56:47 %K %MOSTI ID: 10054253 %PMedium: X %TAsymmetric hillslope erosion following wildfire in Fourmile Canyon, Colorado %X
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 and 2012, and extreme flooding in September 2013. 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 sensitive to erosion by surface runoff. The polar‐facing burned slope had significantly lower cesium‐137 (137Cs) and lead‐210 (210Pb) inventories (