My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in SSSAJ

  1. Vol. 54 No. 4, p. 1102-1106
     
    Received: Nov 14, 1988
    Published: July, 1990


    * Corresponding author(s):
 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1990.03615995005400040030x

Slope, Aspect, and Phosphogypsum Effects on Runoff and Erosion

  1. M. Agassi ,
  2. J. Morin and
  3. I. Shainberg
  1. Soil Erosion Research Center, Emeq Hefer, Israel
    Institute of Soils and Water, ARO, The Volcani Center, P.O.B. 6, Bet Dagan, Israel

Abstract

Abstract

The effect of slope, aspect (windward vs. leeward), and phosphogypsum (PG) application on rain amount, runoff, and erosion from a Grumusol soil (Typic Chromoxerert in Israel) was measured in small field plots (1 by 1.5 m) exposed to natural rainstorms. The amount of effective rain on the slopes, as measured with small rain gauges with orifices in a plane parallel to the slope, increased slightly on the windward aspect as slope increased to ∼58% and decreased thereafter. On the leeward aspect, the amount of effective rain dropped steadily to half of the meteorological rain at a slope of 100%. The amount of runoff was not affected by slope on the windward aspect but decreased sharply on the leeward aspect as slope increased. PG releases electrolytes into the percolating and runoff water, prevents dispersion of the particles at the surface, stabilizes the soil structure, and reduced soil erosion. PG applied at 5 Mg ha−1 reduced runoff to about 25% of that in the control and reduced soil loss to 1 to 3% of that in the control. The dramatic effect of PG on erosion increased with slope steepness.

This work was supported by US-Israel CDR Project no. C7-036.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America