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In Situ Long-Term Chloride Transport through a Layered, Nonsaturated Subsoil. 2. Effect of Layering on Solute Transport Processes

^a Department of Environmental Sciences and Land Use Planning, Université Catholique de Louvain, Croix du Sud, 2 Bte. 2, B-1348 Louvain-la-Neuve, Belgium
^b Currently, Agrosphere Inst., ICG-IV, Forschungszentrum GmbH, D-52425 Juelich, Germany

View larger version (36K): [in a new window]   Fig. 1. Soil profile description and comparison between the apparent parameter distribution considering that porous cup samples are resident concentration (red) and flux concentrations (blue). Error bars represents the standard deviation resulting from fits to different realizations of concentration time series.

View larger version (47K): [in a new window]   Fig. 2. Actual (plus signs) and optimized Cl– time series considering only one-half of the data (red lines from 0 to 4000 and blue line from 4000 to 6500 d) and on whole the data set (green line).

View larger version (37K): [in a new window]   Fig. 3. Comparison of the apparent parameter distribution from optimization on the first half (red), second half (blue), or all the porous cup samplers data (green). Error bars represent the standard deviations. Scale for dispersivity has been limited to 100 cm for clarity purposes.

View larger version (43K): [in a new window]   Fig. 4. Mean arrival time distributions resulting of optimization for 1000 equiprobable Cl– concentration time series.

View larger version (36K): [in a new window]   Fig. 5. Mean apparent velocities (crosses with standard deviations) obtained from 1000 input time series vs. simulated apparent velocities using water content profile measurements (continuous lines) with standard deviations due to water content variations (dashed lines).

View larger version (33K): [in a new window]   Fig. 6. Actual (circles) vs. simulated apparent dispersivity profiles considering a mean water content for the entire profile of 0.2 (in blue) or with nonuniform water content (in red).