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

Discussion in 'Pumps and Tanks Well Forum & Blog' started by Randyj, Jun 4, 2007.

1. ### RandyjMaster Plumber

Joined:
Nov 25, 2006
Location:
Alabama

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

2. ### RancherGuest

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

4. ### RandyjMaster Plumber

Joined:
Nov 25, 2006
Location:
Alabama
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...

5. ### rshacklefordNew Member

Joined:
Oct 18, 2005
Location:
Eastern Montana (The Bakken)
yeah, but how many acre feet would that be?

6. ### RancherGuest

0.00184132996632996632996632996633 acre-feet

Rancher

7. ### speedbumpPrevious member

Joined:
Jul 15, 2005
Occupation:
Water well and pump tech.
Location:
Riverview, Fl.
Did you do that longhand Rancher???

8. ### hjModerator & Master PlumberStaff Member

Joined:
Aug 31, 2004
Occupation:
Plumber
Location:
Cave Creek, Arizona
acre feet

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

9. ### RancherGuest

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 a moderator: Jun 5, 2007
10. ### rshacklefordNew Member

Joined:
Oct 18, 2005
Location:
Eastern Montana (The Bakken)

11. ### Bob NHIn the Trades

Joined:
Oct 20, 2005
Location:
New Hampshire
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 (′mīnÂ·ərz ′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: Jun 7, 2007
12. ### rshacklefordNew Member

Joined:
Oct 18, 2005
Location:
Eastern Montana (The Bakken)
so there are about 40 miner's inches in a cfs?

13. ### Bob NHIn the Trades

Joined:
Oct 20, 2005
Location:
New Hampshire
Yes; in Arizona, California, Montana, Nevada, and Oregon where a Miner's inch is 11.22 GPM.