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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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Trends in climatic variables, streamflow, agricultural practices, and loads of nutrients and suspended solids were estimated for 1976-1995 in the Maumee and Sandusky watersheds, two large agricultural basins draining to Lake Erie. To understand the ...
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Export of agricultural nutrients and sediment to lakes and oceans is of great environmental concern in many agricultural watersheds. Recent years have seen efforts to reduce loads through agricultural practices such as conservation tillage, efficient ...
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