PUMPING-INDUCED GROUNDWATER FLUCTUATIONS AS AN INDICATOR OF PUBLIC SUPPLY WELL VULNERABILITY
Pressure transducers in each monitoring well collected water-level data at 1-minute intervals during a 30-day period in order to monitor the response to public supply well pumping. Analysis of water-level data allowed for implementation of an automated method to isolate and characterize each RWF event in terms of magnitude and duration. Identification of RWFs in monitoring wells from multiple locations show that they are occurring over a much larger portion of the aquifer system than previously reported. Comparison between municipal supply well and monitoring well data identified correlations between well responses and pumping cycles. Additionally, the observed magnitude and duration of RWFs were related to distance between monitoring well depth and the confining layer depth. Knowledge of how these and other variables affect monitoring well responses across multiple sites may lead to a better understanding of how to mitigate public supply well vulnerability to near surface contaminants.