Application of the convection-dispersion model to solute transport in finite soil columns

The one-dimensional convection-dispersion model is investigated with respect to the proper boundary conditions to impose in applications to tracer movement in freely draining soil columns. It is shown that the model can be interpreted probabilistically and that this interpretation leads to physical restrictions on solute molecule transport through the inlet and exit boundaries of a soil column. These constraints, in turn, show that the correct exit boundary condition for a freely draining soil column is zero resident concentration or, equivalently, zero gradient in the flux concentration. A new solution is presented for the resident concentration under a closed inlet boundary.


Published in:
Soil Science Society of America Journal, 52, 1, 3-9
Year:
1988
Publisher:
American Society of Agronomy
ISSN:
0361-5995
Keywords:
Note:
Download from: http://soil.scijournals.org/cgi/content/abstract/52/1/3
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Note: The status of this file is: EPFL only


 Record created 2005-12-09, last modified 2018-03-17

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