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Dissolution of nonaqueousphase liquid pools in anisotropicaquifers

Chrysikopoulos Constantinos, E .T Vogler

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URI: http://purl.tuc.gr/dl/dias/715B4B5F-FB4F-4482-BAED-47F87D7152A3
Year 2001
Type of Item Peer-Reviewed Journal Publication
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Bibliographic Citation E. T. Vogler ,C. V. Chrysikopoulos, "Dissolution of nonaqueous phase liquid pools in anisotropic aquifers " ,Stoch. Environ.Research and Risk Ass. ,vol.15, no.1, pp. 33-46,2001.doi :10.1007/PL00009787 https://doi.org/10.1007/PL00009787
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Summary

A two-dimensional numerical transport model is developed to determine the effect of aquifer anisotropy and heterogeneityon mass transfer from a dense nonaqueous phase liquid (DNAPL) pool. The appropriate steady state groundwater flow equationis solved implicitly whereas the equation describing the transport of a sorbing contaminant in a confined aquifer is solvedby the alternating direction implicit method. Statistical anisotropy in the aquifer is introduced by two-dimensional, randomlog-normal hydraulic conductivity field realizations with different directional correlation lengths. Model simulations indicatethat DNAPL pool dissolution is enhanced by increasing the mean log-transformed hydraulic conductivity, groundwater flow velocity,and/or anisotropy ratio. The variance of the log-transformed hydraulic conductivity distribution is shown to be inverselyproportional to the average mass transfer coefficient.

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