Groundwater Sampling Information
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Volume Formula
Volume = p x r2 x h
Curved surface area = 2 x p x r x h
End surface area = 2 x p x r2
Water Data & Formulas
1 gallon water = 231 cubic inches = 8.333 pounds (@ 65°F)
1 pound of water = 27.72 cubic inches (@ 65°F)
1 cubic foot of water = 7.5 gallons = 62.4 pounds (salt water weighs approximately 64.3 pounds per cubic foot)
pounds per square inch at bottom of a column of water = height of column in feet x 0.434 (39°F)
1 miner’s inch = 9 to 12 gallons per minute
Horsepower to Raise Water
| Horsepower = |
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(if pumping a liquid other than water, multiply the gallons per minute above by the liquid's specific gravity)
Gallons Per Minute through a Pipe
GPM = 0.0408 x Pipe Diameter inches2 x Feet / minute water velocityWeight of Water in a Pipe
Pounds Water = Pipe Length feet x Pipe diameter inches2 x 0.34Gallons per Minute of a Slurry
| GPM Slurry = GPM Water + |
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Approximate Amount of Water in a Well
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Diameter of casing or hole in inches
|
Gallons per foot of depth
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Cubic feet per foot of depth
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Liters per meter of depth
|
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1
|
0.041
|
0.0055
|
0.509
|
|
1.5
|
0.092
|
0.0123
|
1.142
|
|
2
|
0.163
|
0.0218
|
2.204
|
|
2.5
|
0.255
|
0.0341
|
3.167
|
|
3
|
0.367
|
0.0491
|
4.558
|
|
3.5
|
0.500
|
0.0668
|
6.209
|
|
4
|
0.653
|
0.0873
|
8.110
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Capacity of Tanks
|
Tank diameter
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Gallons per foot depth
|
|
12"
|
5.86
|
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18"
|
13.20
|
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24"
|
23.42
|
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30"
|
36.6
|
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36"
|
52.6
|
|
42"
|
71.6
|
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48"
|
93.6
|
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54"
|
119.0
|
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60"
|
146.0
|
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72"
|
211.0
|