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Issue 11, 2005
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Comparison of field-observed and model-predicted plume trends at fuel-contaminated sites: Implications for natural attenuation rates

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Abstract

Subsequent to modeling of natural attenuation processes to predict contaminant trends and plume dynamics, monitoring data were used to evaluate the effectiveness of natural attenuation at reducing contaminant concentrations in groundwater at seven fuel-contaminated sites. Predicted and observed contaminant trends at seven sites were compared in order to empirically assess the accuracy of some fundamental model input parameters and assumptions. Most of the models developed for the study sites tended to overestimate plume migration distance, source persistence, and/or the time required for the benzene, toluene, ethyl benzene, and xylenes (BTEX) plumes to attenuate. Discrepancies between observed and predicted contaminant trends and plume behavior suggested that the influence of natural attenuation process may not have been accurately simulated. The conservatism of model simulations may be attributed to underestimation of natural source weathering rates, overestimation of the mass of contaminant present in the source area, and/or use of overly conservative first-order solute decay rates.

Graphical abstract: Comparison of field-observed and model-predicted plume trends at fuel-contaminated sites: Implications for natural attenuation rates

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Publication details

The article was received on 20 Apr 2005, accepted on 05 Aug 2005 and first published on 17 Aug 2005


Article type: Paper
DOI: 10.1039/B505539C
Citation: J. Environ. Monit., 2005,7, 1099-1104
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    Comparison of field-observed and model-predicted plume trends at fuel-contaminated sites: Implications for natural attenuation rates

    S. Jeong, D. H. Kampbell, Y. An and B. M. Henry, J. Environ. Monit., 2005, 7, 1099
    DOI: 10.1039/B505539C

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