A well has been pumped at a steady rate for a very long time. The well has a 12-inch diameter and fully penetrates an unconfined aquifer that is 160 feet thick. Two small observation wells are 60 feet and 100 feet from the well, and the corresponding observed drawdawn are 39 and 18 feet. If the estimated hydraulic conductivity is 13 ft/day, what is the discharge?

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.