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

Jury, W.A.; Fluhler, H.; Stolzy, L.H.

Water Resources Research 13(3): 645-650

1977

ISSN/ISBN: 0043-1397
DOI: 10.1029/wr013i003p00645
Accession: 005692024

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Summary
Studies of salt movement through 24 cropped lysimeters receiving high-salinity irrigation were reported. A great deal of variability apparently existed between depth-equivalent salinity sensor readings during the experiment, 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 water uptake distribution by an amount consistent with the uncertainty in their measurement to see the effect on solute concentrations. Large variations in the conductivity-water content relations and 10% uncertainty in the input flux apparently had little effect on solute concentrations, but variations in water uptake patterns within the top 60 cm created a large distribution of concentrations at a given depth and time.

References

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