Pumping water question

[wap]

I can get a 4" water pump that pumps, I think 36000 gallons an hour. Anybody know how many gallons is in an acre 1 foot deep? Thanks for the help

[duckmon]

a little over 325,000 gallons.

[Ducklord]

Don't know, but i rented 4" pump this weekend, and it took about 8 hours to get 2" of water spread through a 2-3 acre field. To get a foot deep, I am thinking you will need a solid 20 hrs of pumping to get it a foot deep, but that is just a guess and it depends on how wet your soil is.

[JaMak84]

It's gonna take you longer than 24 hrs, cause of I was a betting man, I'd say that 4" pump won't pump anywhere close to 600gpm.

[JaMak84]

On second thought, you may be pretty close ducklord. Assuming 300 gpm pitts it close to 20 hrs. Take into account saturation and some evaporation would put you around the 24 hr mark.

[deltadukman]

The real question is if you have 24 hrs worth of water in the ditch your puming from. I'd say no, unless its a real big ditch or running creek.

[Bercy]

Wingman put the numbers to it a year or so ago - made my head hurt. Thought I kept a copy, but don't see it.

[BR549]

325851.8 gallons in an acre foot. If you had 4 acres leveed up where there would be no spillage, runnoff or spreading at 600gpm it would take you appx 36.2 hrs before absorption. To factor in absorption rates would be very hard to do for it would vary depending on soil type and how much moisture is already there. Now this is in theory only. You would need ample water supply almost no lift and larger pipe than 4" as to not impede your flow to get the 600gpm out of a 4 inch pump. Better figure on about 450gpm would be more realistic.

[novacaine]

I can get a 4" water pump that pumps, I think 36000 gallons an hour. Anybody know how many gallons is in an acre 1 foot deep? Thanks for the help

That's probably a suction lift pump. That is a factory spec probably assuming very low suction lift with discharged at the outlet with no hose on outlet side to cause additional headloss. Most out of the box pumps (of any make, model,etc) will only be approx 80% of rated capacity in a real world situation.
Most of your other questions were answered but another conversion is 1 acre inch is about 27,000 gallons(i think i remember correctly).
If you are pumping from a ditch (of unknown capacity), that tells me that you do have some dicharge length of pipe with vertical lift requirements that will cause additional headloss for the pump. So, if you could get 60%- 70% of the rated capacity of that pump, i would be surprised.
But use what you have and start early and stay late or ...........
GET MORE COWBELL!!!!!
Good luck and keep up the PUMPATUDE!!!!!!!

[wap]

Thanks for the info