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Determine the volume of water in gallons for the following distribution system: Distribution pipe “A” is 1,376 ft in length and 3.0 ft in diameter. Distribution pipe “B” is 833 ft in length and 2.0 ft in diameter.
Backwash rates. Example: What is the backwash flow required in gpm to backwash a 25 ft wide by 30 ft long filter if a backwash flow of 20 gpm/sq ft is required? Set up: ___ft x ___ft = sq ft. ___sq ft x ___gpm/sq ft = gpm.
How many gallons of water are left in a reservoir if there were 10 acre feet of water at the beginning of the month and 1,000,000 gallons were removed by the end of the month? Answer – 7 acre feet
Basic Water Treatment Math Formulas for Surface and Well Exams These formulas are intended to serve as a general resource and are not intended to be an all‐inclusive list. AREA Rectangle: A, ft2 = L * W Circle: A, ft2 = 0.785 * D2 VOLUME
30 Απρ 2020 · Familiarize yourself with: Gallons per cubic ft = gal/cu ft. Pounds per gallon = lbs/gal. Pounds per square inch = psi. Gallons per day = gpd. Gallons per minute = gpm. Million Gallons = MG. Million Gallons per day = MGD.
Specific Capacity of a Well – Roughly estimating T Specific Capacity = Discharge Rate/Drawdown in the well 1. A well is pumped to approximate equilibrium. 2. A good well would be 50 gpm per foot of drawdown, or 20 feet of drawdown at 1,000 gpm. 3. h e and r e are the head and corresponding distance from a well where drawdown is effectively ...
Pump efficiency is 65% and motor efficiency is 90%. Example 2: Calculate the daily electrical cost to operate the pump in example 1 if the cost of electricity is $0.12 per Kw-hr. Solve the following for Water Horse Power Water HP = (Flow, gpm) x (Head, ft.) 3,960 gpm-ft/HP.
