Desgin a well for a pumping rate of 13.0 lps (206.1 gpm) from an unconfined aquifer with a...

Desgin a well for a pumping rate of 13.0 lps (206.1 gpm) from an unconfined aquifer with a saturated thickness of 15.0 m (49.2 ft), a hydraulic conductivity of 15.0 m/day (368 gpd/ft2), and a storage coefficient of 0.15. The base of the aquifer is 30 m (98.4 ft) below the ground surface. Aquifer samples collected while drilling indicate the fol­lowing grain size to be representative of the formation.

Compute the drawndown at the well after 90 days of continours pumping at the design rate.