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Effect of Water Flux on Solute Velocity and Dispersion

^a School of Natural Resources, The Ohio State Univ., 422A Kottman Hall, 2021 Coffey Road, Columbus, OH 43210
^b Dep. of Natural Resources and Environmental Sci., Univ. of Illinois, Urbana, IL 61801
^c Dep. of Land and Water Resources, Univ. of California, Davis, CA 95616

View larger version (25K): [in a new window]   Fig. 1. Measured and connective dispersion transport equation (CDE) fitted breakthrough curves from loam soil columns for GD0Vl model for step chloride application in (a, b) 10- and (d) 20-cm columns and pulse application in (c) 10-, (e) 20-, and (f) 30-cm columns. Note that time of effluent arrival is plotted on a log scale.

View larger version (29K): [in a new window]   Fig. 2. Measured and connective dispersion transport equation (CDE) fitted breakthrough curves from sandy loam soil columns for GD0Vl model for pulse chloride application in (a) 10-, (b) 20-, and (c) 30-cm columns. Time of effluent arrival is plotted on a log scale.

View larger version (33K): [in a new window]   Fig. 3. The relationship between measured pore water velocity (vm), ratio of observed and theoretical travel times, and ratio of measured and effective solute water velocity (v) for (a) loam and (b) sandy loam soil columns.

View larger version (18K): [in a new window]   Fig. 4. The relationship between measured pore water velocity and fitted pore water velocity for loam and sandy loam soil columns.

View larger version (18K): [in a new window]   Fig. 5. Dispersion coefficient (D) and measured pore water velocity (vm) relationships in loam and sandy loam soil columns. CDE = connective dispersion transport equation.