PMID: 29755148May 15, 2018Paper

Modified Well-Field Configurations for Improved Performance of Contaminant Elution and Tracer Tests

Water, Air, and Soil Pollution
Zhilin Guo, Mark L Brusseau

Abstract

Contaminant elution and tracer (CET) tests are one method for characterizing the impact of mass transfer, transformation, and other attenuation processes on contaminant transport and mass removal for subsurface systems. The purpose of the work reported herein is to explore specific well-field configurations for improving CET tests by reducing the influence of preferential flow and surrounding-plume effects. Three injection-extraction well configurations were tested for different domain conditions using a three-dimensional numerical model. The three configurations were the traditional configuration with a single pair of injection-extraction wells, modified configuration I with one extraction well located between two injection wells, and modified configuration II with two pairs of injection-extraction couplets (one nested within the other). Elution curves for resident contaminant and breakthrough curves from simulated tracer tests were examined for specific landmarks such as the presence and extent of steady-state (relatively high concentrations) and asymptotic (asymptotic decrease to low concentrations) phases, as well as distinct changes in slope. Temporal-moment analysis of the breakthrough curves was conducted to evaluate mas...Continue Reading

References

May 27, 2004·Ground Water·Susannah K SandrinNicole T Nelson
Sep 11, 2004·Journal of Contaminant Hydrology·Beth L ParkerSteven W Chapman
Mar 25, 2006·Ground Water·Jian LuoPeter K Kitanidis
Apr 4, 2006·Journal of Contaminant Hydrology·Nandita B BasuK Hatfield
Oct 20, 2006·Journal of Contaminant Hydrology·M L BrusseauT Allen
Dec 6, 2006·Environmental Science & Technology·Michael O RivettJohn A Cherry

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