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ANALYTICAL AND NUMERICAL MODELING OF SOLUTE INTRUSION, RECOVERY, AND REBOUND IN FRACTURED BEDROCK
Nagare, R.M., Y.-J. Park, T. Butterfield, C. Belenky, and S. Scyrup.
Groundwater [Published online 18 April 2019 prior to print]
This study presents a set of analytical solutions to estimate diffusive mass intrusion into matrix blocks, validated by comparing the results with (1) numerical model results using the same model parameters and (2) observed chloride mass recovery, rebound concentration, and concentration in pumped groundwater at a highly fractured bedrock site in Alberta, Canada. The analytical solutions can be used to estimate the total mass stored in the fractured bedrock prior to any remediation, providing insights into site contamination history. Predictive results show that successful remediation by pumping depends largely on a diffusive intrusion period. The results of initial mass from the analytical model were used to successfully calibrate a 3-D discrete fracture network numerical model, further highlighting the utility of the simple analytical solutions in supplementing the more detailed site numerical modeling.
Groundwater [Published online 18 April 2019 prior to print]
This study presents a set of analytical solutions to estimate diffusive mass intrusion into matrix blocks, validated by comparing the results with (1) numerical model results using the same model parameters and (2) observed chloride mass recovery, rebound concentration, and concentration in pumped groundwater at a highly fractured bedrock site in Alberta, Canada. The analytical solutions can be used to estimate the total mass stored in the fractured bedrock prior to any remediation, providing insights into site contamination history. Predictive results show that successful remediation by pumping depends largely on a diffusive intrusion period. The results of initial mass from the analytical model were used to successfully calibrate a 3-D discrete fracture network numerical model, further highlighting the utility of the simple analytical solutions in supplementing the more detailed site numerical modeling.
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