Influence of soil properties, leaching fraction, and plant water uptake on solute concentration distribution

Studies of salt movement through 24 cropped lysimeters receiving high‐salinity irrigation are reported. A great deal of variability was found between depth–equivalent salinity sensor readings during the experiment, both between different lysimeters receiving the same water and salt inputs and among...

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Bibliographic Details
Published in:Water resources research 1977-06, Vol.13 (3), p.645-650
Main Authors: Jury, W. A., Fluhler, H., Stolzy, L. H.
Format: Article
Language:English
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Summary:Studies of salt movement through 24 cropped lysimeters receiving high‐salinity irrigation are reported. A great deal of variability was found between depth–equivalent salinity sensor readings during the experiment, both between different lysimeters receiving the same water and salt inputs and among lateral replicates within each lysimeter. A computer simulation of the first 75 days of the experiment, using the measured soil properties and external inputs, alternately varied the hydraulic conductivity–water content relation, the irrigation flux, and the water uptake distribution by an amount consistent with the uncertainty in their measurement to see the effect on solute concentrations. It was found that large variations in the conductivity–water content relations and 10% uncertainty in the input flux had little effect on solute concentrations but that variations in the water uptake patterns within the top 60 cm created a large distribution of concentrations at a given depth and time.
ISSN:0043-1397
1944-7973
DOI:10.1029/WR013i003p00645