Design a well for a pumping rate of 31.5 lps (500 gpm) from an unconfined aquifer with a s...

Design a well for a pumping rate of 31.5 lps (500 gpm) from an unconfined aquifer with a saturated thickness of 18.3 m (60.0 ft), a hydraulic conductivity of 30.6 m/day (750 gpd/ft2), and a storage coefficient of 0.15. The base of the aquifer is 25.9 m (85 ft) below the ground surface. Aquifer samples indicate a uniform formation with the following grain size.

Compute the drawdown at the well after 90 days of continuous pumping at a rate of 31.5 lps (500 gpm).