A field test is conducted in an unconfined aquifer by pumping 1,300 ft 3/hr from an 8- inch diameter well penetrating the aquifer. The undisturbed aquifer thickness is 46 ft. The draw downs, measured at steady state at various locations, are tabulated below. Determine the coefficient of permeability and how far away from the well you must be before the drawdown becomes less than 2.5 ft.

Transcribed Image Text:

r(i) 0.33 40 125 350 6,05 405 3.57 3.05