determine the drawdown at a 305-mm (12-in.) diameter well installed in an unconfined aquifer after pumping for 90 days at a rate of 18.9 lps (300 gpm). The aquifer has a saturated thickness of 12.2 m (40.0 ft), a storage coefficient of 0.12, and a hydraulic conductivity of 45.7 m/day (150 ft/day).
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