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In a prior work, KINEROS2 was used to model sediment transport observed on small-scale unpaved road plots during simulated rainfall. A step function allowong road surface erodibility to change over time was used to simulate the removal of a loose sediment layer on the road surface. In this work, we replace the step function with an exponential decay function. The resulting method improves the continuous sediment transport time series estimate, but under-estimates peak sediment output, as diddoi:10.13031/2013.4874 fatcat:aqcwzi3cl5c2hcufu6iiy5xeae