A 16-inch radius well draws water from a confined aquifer at the rate of 1,570 gpm. The

Question:

A 16-inch radius well draws water from a confined aquifer at the rate of 1,570 gpm. The confined aquifer is 100 feet thick with a piezometric surface (before pumping) that is, 350 feet above the bottom of the confined aquifer. The drawdown at the well is 100 feet Determine the radius of influence if the aquifer's hydraulic conductivity is 4. 01 X 10-4 ft/sec.