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Tracer Migration in a Radially Divergent Flow Field: Longitudinal Dispersivity and Anionic Tracer Retardation

Savannah River Ecology Lab., Univ. of Georgia, Drawer E, Aiken, SC 29802

View larger version (13K): [in this window] [in a new window]   FIG. 1. (A) Relative location of injection well (IW) and monitoring wells (S1–S6) at the injection test site (ITS), and (B) location of monitoring zones in relation to the natural water-table depth and forced radial gradient established before tracer injection for Exp. A.

View larger version (27K): [in this window] [in a new window]   FIG. 2. Observed tritium breakthrough curves from Exp. A for each sampling zone within the six radially spaced monitoring wells (S1–S6). For some monitoring wells sampling continued beyond the duration presented in the figure.

View larger version (24K): [in this window] [in a new window]   FIG. 3. Observed tritium breakthrough data from Exp. A for Well S1, Zone 3; simulated breakthroughs (solid lines) and model-derived parameters based on (A) Model 1 and (B) Model 2.

View larger version (32K): [in this window] [in a new window]   FIG. 4. Observed tritium breakthrough data (squares) for Well S6, Zone 3 for all experiments with simulated breakthroughs (solid lines) and model-derived physical transport parameters based on Model 1 (left column) and Model 2 (right column).

View larger version (26K): [in this window] [in a new window]   FIG. 5. Tritium breakthrough data and radial model fits for Well S4, Zone 3.

View larger version (24K): [in this window] [in a new window]   FIG. 6. Bromide breakthrough history for Exp. B. For some monitoring wells sampling continued beyond the duration presented in the figure.

View larger version (28K): [in this window] [in a new window]   FIG. 7. Tritium, Br, and FBA breakthrough curves for Exp. C. For some monitoring wells sampling continued beyond the duration presented in the figure.