Southwest Hydro-Logic

Helpful Hydrologic Hints

1 ft3/sec (cfs) = 448.8 gal/min (gpm)

100 acre-ft/yr = 0.138 ft3/sec

1 gal/min = 0.0044 acre-ft/d = 1.61 acre-ft/yr

1 million gallons per day (MGD) = 1.55 ft3/sec

1 ft3 = 7.48 gallons of water

1 gal of water = 8.35 lbs

1 ft of head = 0.43 psi of hydrostatic pressure

1 psi of hydrostatic pressure = 2.31 ft of head

1 mg/L=1 milligram per liter=1 part per million

1 mg/L=1 microgram per liter=1 part per billion