MONTE-CARLO SIMULATION OF NONINTERACTING SOLUTE TRANSPORT IN A SPATIALLY HETEROGENEOUS SOIL

Monte-Carlo data generation techniques were used to obtain 200 pairs multivariate lognormal values of the physical parameters D (dispersion coefficient) and nu (pore-fluid velocity) which appear in the differential equation describing downward leaching of a noninteraction solute in the soil profile under steady-state percolation. The time (t//m//a//x), at which the maximum concentration is attained at given soil depth L after a pulse input of solute has been applied at the soil surface for a time t//o, was obtained for each pair of generated D and nu values. Values of the ratio DELTA L/ DELTA t//m//a//x representing the average rate of movement of the maximum concentration between two depths were also calculated. Refs.