CONFINED AQUIFER RESPONSES TO PUMPING – POTENTIAL IMPACTS ON PLUME MIGRATION
Pressure waves are transmitted in confined aquifers with relatively little damping compared with surficial phreatic aquifers. Confined aquifers may therefore be subject to abrupt and far-reaching changes in the rate and direction of groundwater flow due to changes in well pumping. Where there is a mechanism for contaminants to reach a confined aquifer, the contaminant migration within the aquifer can be significantly influenced by flow field variability. A groundwater flow and mass transport study recently conducted for a site in Nassau County, New York had to account for rapid flow changes and complete 360-degree variability in groundwater flow direction over time. Study results were presented using animations, which clearly illustrated the dynamic nature of groundwater flow patterns within the confined aquifer.
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Document Type: Research Article
Publication date: 2007-01-01
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