Quantification of Soil Loss and Sediment Produced from Eroded Land1
- D. T. Lewis and
- M. J. Lepele2
Soil eroded from slopes and sediment added to stream systems as non-point pollution from a small watershed in southeastern Nebraska were quantified. The watershed studied was within delineation of severely eroded loessial soils. Calculations of soil loss were based on horizonation and clay distribution in eroded pedons as compared to slightly eroded pedons in the same soil series. Thickness and areal extent of soil loss were used to calculate weight and volume of soil moved from the slopes as well as volume and weight of sediment that remained near its source on the landscape. Amount of soil eroded minus that remaining in local storage suggested an amount added from the watershed as non-point sediment pollution in streams. The method described suggests a way in which soil survey mapping units may be characterized in order to quantify the amount of sediment in storage on the landscape and in stream systems due to past erosion of agricultural land.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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