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This article in JEQ

  1. Vol. 14 No. 2, p. 186-190
     
    Received: Aug 29, 1984
    Published: Apr, 1985


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doi:10.2134/jeq1985.00472425001400020007x

Water Quality from Erosion Control Structures in Nebraska1

  1. J. S. Schepers,
  2. D. D. Francis and
  3. L. N. Mielke2

Abstract

Abstract

Runoff collected from terrace and sediment-control basins having tile-outlet systems was compared with runoff water quality from Maple Creek in northeastern Nebraska. This study was part of a Model Implementation Project (MIP) initiated in 1978 to accelerate land treatment for erosion control and development of best management practices (BMPs). Soils in the area are very erosive (Nora-Crofton complex) when subjected to high-intensity rainfall in the spring and summer. Sediment concentrations in runoff from the terraces and sediment basins were initially high and comparable to stream concentrations until a pool of runoff water formed around the riser inlet of the tile discharge system. Formation of a pool allowed sediment to settle out away from the riser inlet, thus reducing sediment losses from the field. Sediment-borne N and P accounted for 85 to 98% of total N and P losses from the land. Because tile-outlet terraces and sediment basins effectively reduced sediment and nutrient concentrations in runoff, they proved to be an effective BMP for use by producers.

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