Simulation of reactive geochemical transport in groundwater using a semi-analytical screening model

A reactive geochemical transport model, based on a semi-analytical solution to the advective-dispersive transport equation in two dimensions, is developed as a screening tool for evaluating the impact of reactive contaminants on aquifer hydrogeochemistry. Because the model utilizes an analytical sol...

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Bibliographic Details
Published inComputers & geosciences Vol. 23; no. 8; pp. 869 - 882
Main Author McNab, Walt W.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.10.1997
Subjects
Geochemical modeling
Groundwater geochemistry
Reactive chemical transport
Reactive chemical transport
Geochemical modeling
Groundwater geochemistry
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Summary:A reactive geochemical transport model, based on a semi-analytical solution to the advective-dispersive transport equation in two dimensions, is developed as a screening tool for evaluating the impact of reactive contaminants on aquifer hydrogeochemistry. Because the model utilizes an analytical solution to the transport equation, it is less computationally intensive than models based on numerical transport schemes, is faster, and it is not subject to numerical dispersion effects. Although the assumptions used to construct the model preclude consideration of reactions between the aqueous and solid phases, thermodynamic mineral saturation indices are calculated to provide qualitative insight into such reactions. Test problems involving acid mine drainage and hydrocarbon biodegradation signatures illustrate the utility of the model in simulating essential hydrogeochemical phenomena.
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content type line 23
ISSN:0098-3004
1873-7803
DOI:10.1016/S0098-3004(97)00056-3