About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in SSSAJ

  1. Vol. 50 No. 6, p. 1537-1540
     
    Received: Jan 13, 1986
    Published: Nov, 1986


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1986.03615995005000060031x

Suspension Concentration Effects on Depositional Crusts and Soil Hydraulic Conductivity1

  1. I. Shainberg and
  2. M. J. Singer2

Abstract

Abstract

Depositional crusts form when turbid water infiltrates into soils. These crusts may reduce water infiltration rates. The effect of four concentrations of fine particles (0, ∼0.25, ∼0.5, and ∼1.0%) and two electrolyte concentrations (0.001 M and 0.005 M Cl-) on water infiltration rate was studied. Infiltration and hydraulic conductivity (HC) of two nonsodic soils were not affected by leaching with the salt solutions because the electrolyte concentration in the percolating water was sufficient to prevent clay dispersion and swelling in the soils. The clay and silt that deposited at the soil surface decreased the water infiltration rate. The HC of the depositional crust was 2 and 3 orders of magnitude less than the HC of bulk soils in the 0.005 M and 0.001 M solutions, respectively. The rate of crust formation and the decrease in infiltration rate increased with increase in the solids concentration. Applying a −1.5-kPa potential reduced crust HC but had no effect on soil HC. The effect of a potential was more pronounced on the crust deposited from the 0.005 M suspensions than on crust deposited from 0.001 M suspensions.

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

Copyright © . Soil Science Society of America