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Thread: Test question for you pro's.....

  1. #1

    Default Test question for you pro's.....

    I'm doing mental gymnastics thinking about this well pump, pressure, feet of head, etc.

    If 10 gpm yields 600 gph then how many square feet of lawn will be covered with 1" of water in one hour?

  2. #2
    Rancher
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    7.48 gallons per cubic foot, divide by 12 equals .623 gallons per square foot, 1 inch deep, divided into 600 is 962.5 square feet or about a 31' by 31' lawn.

    Rancher

  3. #3

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    Thanks!... easy to remember...the same size as the floor space in the little house I'm building...so 10 gpm would flood my floor with 1" of water in one hour...

  4. #4
    DIY Senior Member rshackleford's Avatar
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    yeah, but how many acre feet would that be?
    rshackleford

  5. #5
    Rancher
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    0.00184132996632996632996632996633 acre-feet

    Rancher

  6. #6
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    Did you do that longhand Rancher???

  7. #7
    Moderator & Master Plumber hj's Avatar
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    Default acre feet

    A cubic foot of water is 7.48 gallon, An acre foot is 43560 square feet. Do the math.

  8. #8
    Rancher
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    I hate math, I guessed. And I figured nobody would call me on it.

    And an acre foot is 43560 square feet, one foot deep, i.e. 43560 cubic feet.

    Rancher
    Last edited by Rancher; 06-05-2007 at 07:20 AM.

  9. #9
    DIY Senior Member rshackleford's Avatar
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    how about in miner's inches?
    rshackleford

  10. #10
    In the Trades Bob NH's Avatar
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    Quote Originally Posted by rshackleford
    how about in miner's inches?
    A Miner's inch is not a unit of volume; it is a flow rate. It depends on where you are and has been established by law in several states.

    In Arizona, California, Montana, Nevada, and Oregon it is 11.22 GPM, but by general practice (not law) in Southern California it is 9 GPM.

    In Idaho, Kansas, Nebraska, New Mexico, North Dakota, South Dakota, and Utah it is 8.98 GPM.

    In Colorado it is 11.69 GPM.

    Reference: Colt Industries Hydraulic Handbook (1971)

    From Wikipedia:
    miner's inch (′mīnĚərz ′inch)
    (mining engineering) The quantity of water that will escape from an aperture 1 inch (2.54 centimeter) square through a 2-inch-thick (5.08-centimeter) plank, with a steady flow of water standing 6 inches (15.24 centimeters) above the top of the escape aperture, the quantity so discharged amounting to 2274 cubic feet (64.39 cubic meters) in 24 hours.
    Last edited by Bob NH; 06-07-2007 at 05:42 AM.

  11. #11
    DIY Senior Member rshackleford's Avatar
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    so there are about 40 miner's inches in a cfs?
    rshackleford

  12. #12
    In the Trades Bob NH's Avatar
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    Quote Originally Posted by rshackleford
    so there are about 40 miner's inches in a cfs?
    Yes; in Arizona, California, Montana, Nevada, and Oregon where a Miner's inch is 11.22 GPM.

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