A Transfer Function Model of Solute Transport Through Soil: 2. Illustrative Applications

A Transfer Function Model of Solute Transport Through Soil: 2. Illustrative Applications The results of field and laboratory studies of solute transport through undisturbed soils following narrow pulse or step‐change inputs of soluble salts or bacteria were analyzed using the transfer function equation developed in paper 1 (Jury et al., this issue) of this series. The travel time probability density function observed for Br and Cl during unsteady flow in an unsaturated, well structured clay suggested a two‐component mechanism comprising fast solute transport through large, interped voids and slow to negligible transport through small, intraped voids. The modal and median travel times varied with soil type, initial water content, and rate of water input. The fractional volume of water that participated in solute transport, θst, was calculated from the rate of water input and the median solute travel time. Values of θst, ranged from 14% to nearly 90% of the mean volumetric water contents ( ) of the soils. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Resources Research Wiley

A Transfer Function Model of Solute Transport Through Soil: 2. Illustrative Applications

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Publisher
Wiley
Copyright
Copyright © 1986 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0043-1397
eISSN
1944-7973
DOI
10.1029/WR022i002p00248
Publisher site
See Article on Publisher Site

Abstract

The results of field and laboratory studies of solute transport through undisturbed soils following narrow pulse or step‐change inputs of soluble salts or bacteria were analyzed using the transfer function equation developed in paper 1 (Jury et al., this issue) of this series. The travel time probability density function observed for Br and Cl during unsteady flow in an unsaturated, well structured clay suggested a two‐component mechanism comprising fast solute transport through large, interped voids and slow to negligible transport through small, intraped voids. The modal and median travel times varied with soil type, initial water content, and rate of water input. The fractional volume of water that participated in solute transport, θst, was calculated from the rate of water input and the median solute travel time. Values of θst, ranged from 14% to nearly 90% of the mean volumetric water contents ( ) of the soils.

Journal

Water Resources ResearchWiley

Published: Feb 1, 1986

References

  • Soil morphology and preferential flow along macropores
    Bouma, J.
  • Simulation of solute transport using a transfer function model
    Jury, W. A.
  • Chemical Mobility and Reactivity in Soil Systems
    Jury, W. A.
  • Soil Salinity under Irrigation
    Jury, W. A.

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