ARS | Publication request: Average pollutant concentration in soil profile simulated with Convective-Dispersive Equation. Model and Manual

Submitted to: Agricultural Research Service Publication
Publication Type: Other
Publication Acceptance Date: December 13, 2010
Publication Date: December 28, 2010
Citation: Pachepsky, Y.A., Mikailsoy, F. 2010. Average pollutant concentration in soil profile simulated with Convective-Dispersive Equation. Model and Manual. Agricultural Research Service Publication.

Technical Abstract: Different parts of soil solution move with different velocities, and therefore chemicals are leached gradually from soil with infiltrating water. Solute dispersivity is the soil parameter characterizing this phenomenon. To characterize the dispersivity of soil profile at field scale, it is desirable to use changes in total chemical mass in the whole soil profile rather than chemical content in individual soil layers. The computer program ASC implements the analytical solution of the model of dispersive transport in soils and allows a user to (a) fit this solution to field data to obtain soil dispersivity parameter, (b) estimate the average concentration in soil profile when the dispersivity parameter is known, and (c) determine the amount of leaching water needed to bring the average concentration to the desired level. The program is written in FORTRAN and compiled at PC. Examples of input and output files are given.