Basic Units of Measurement and Conversions - Basic Mathematics for Water and Wastewater Operators - page 14

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■ Example 2.1
Problem: Convert 3.8 ft 3 /sec to gallons per second (gps).

Solution :

3

3.8 ft
1sec

1gal
7.48 ft

× = 0.51 gal/sec

3

■ Example 2.2
Problem : Convert 2.6 ft 3 /sec to gallons per minute (gpm).

Solution :

3

2.6 ft
1sec

60 sec
1 min

1gal
7.48 ft

× × = 20.8 66gal/min

3

■ Example 2.3
Problem : A treatment plant produces 7.24 million gallons per day (MGD). How
many gallons per minute is that?

Solution :

7.24 MG
1day

1day
24 hr

1hr
60 min

1,000,00 00gal

1MG

× × × = 5027.78 gal/min

■ Example 2.4
Problem : A pump delivers 705 gpm. How many MGD will that be?

Solution:

705 gal
1min

60 min
1hr

24 hr
1day

1MG

× × × = 1.0152 MGD

1,00 0,000 gal

■ Example 2.5
Problem : How many pounds of water are in a tank containing 825 gal of water?

Solution :

8.34 lb
1gal

825 gal × = 6880.5 lb