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This article in JEQ

  1. Vol. 12 No. 4, p. 498-503
     
    Received: Jan 26, 1983


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doi:10.2134/jeq1983.00472425001200040012x

Suspended Solids and Phosphorus Loads from a Clay Soil: II. Watershed Study1

  1. J. L. B. Culley and
  2. E. F. Bolton2

Abstract

Abstract

Clay soil are very important agriculturally in southwestern Ontario, and they constitute a large proportion of the Canadian Lake Erie drainage basin. Analysis of water quality and quality from a typical clay watershed indicated that estimates of suspended solids load varied substantially, depending on the calculation method; this was not the case for P. Effluent from subsurface drains was estimated to constitute about 60% of annual runoff from the watershed. About 32 and 18% of the suspended solids load was probably derived from bank erosion and subsurface drainage, respectively. Contribution of P from these sources was also substantial. Sediment delivery of eroded soil from cropland was estimated to be about 7% of the sheet and rill erosion rate.

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