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Stubblefield, Andrew P.

Insight into the connection between erosional processes and nutrient exports is important for designing best management practices for sustainable agriculture and minimizing impacts on water quality. We present a mass balance approach to characterize rill and sheetwash erosion during a June 2004 thunderstorm event in Treynor, Iowa, USA. Observed sediment and radionuclide yields and soil profiles were modeled (Simulation of Rill and Sheetwash Erosion Model, SiRSEM) to solve for the areal extent and depth of rill and sheetwash erosion and from this information calculate sediment and nutrient losses. Results indicate that sheetwash eroded 98% of the plot to a depth of 0.078 mm and rills eroded 1% of the plot to a depth...
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