AbstractThe Princeton Transport Code (PTC), a three‐dimensional finite‐element flow and transport model, was used to evaluate contaminant movement and recovery in the vicinity of a manufacturing facility in western Nebraska. The modeling was complicated by seasonal recharge from a nearby irrigation canal, a drainage ditch flowing across the site, municipal wells pumping at variable rates and screened at different levels in the underlying semiconfined aquifer, and the pumping of the three high‐capacity wells being used to recover contaminated ground water. The flow model was calibrated in several steps: steady‐state calibration using the unstressed (no pumping) conditions; steady‐state calibration using the prerecovery pumping conditions; and finally, transient calibration using results obtained for the early recovery pumping period–first for the nonirrigation season and then for the irrigation season. The calibrated flow model was further tested by simulating transport during the early stages of the recov
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