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The Effect of Vertically Decreasing Macropore Fractions on Simulations of Non-Equilibrium Solute Transport

Department of Agronomy, Purdue University, West Lafayette, IN 47907-2054

View larger version (16K): [in a new window]   Fig. 1. Variable infiltration sequences used in transient flow simulation.

View larger version (26K): [in a new window]   Fig. 2. Damkhöler number, E, as a function of depth for the q* = 0.0066 and 1.25 boundary conditions used in the steady flow numerical simulations. Also shown are the E values for the spatially constant representation using surface values (surface) and depth-averaged values (depth-avg).

View larger version (33K): [in a new window]   Fig. 3. Comparison of breakthrough curves at z/L = 1.0 between the layered and surface simulations.

View larger version (24K): [in a new window]   Fig. 4. Comparison of breakthrough curves between layered (solid) and depth-averaged (dashed) values at depths of z/L = 0.25, 0.50, and 1.0 for the q* = 0.24 case.

View larger version (17K): [in a new window]   Fig. 5. Cumulative solute flux at z/L = 1.0 for the layered, depth-averaged, and surface simulations.

View larger version (26K): [in a new window]   Fig. 6. Results of sensitivity analysis for the h = –5 cm (q* = 0.24) case. The top graph shows the reference simulation (used in the original simulations). The graphs underneath show the layered and surface-value simulations after varying a specific test parameter (noted on right) down by 50% of its reference value (graphs on left) or up by 50% of its reference value (graphs on right).