[Market-farming] Irrigation Question

Andy Fellenz fellenz at fltg.net
Thu Feb 26 10:31:32 EST 2009

I'd like to know what you end up with. I'm looking at setting up a 
similar system to irrigate a remote area which does not have access to 
any water.

> --- bcluton at aol.com wrote:
> From: bcluton at aol.com
> To: market-farming at lists.ibiblio.org
> Subject: [Market-farming] Irrigation Question
> Date: Sun, 22 Feb 2009 21:33:55 -0500
> Hi All,
> I've been toying around with some irrigation ideas and would be 
> interested in folks insight and experiences.
> We're looking at ways to get water to a few fields that don't have 
> water access.  And also looking to potentially recover our 
> pre-filtered wash water.(which is currently drained to a swale)
> We currently have a 300 gallon tank that could be mounted on a hay 
> wagon and towed to the field.  The question is how to apply this 
> water.  I've been trying to figure out how to crunch the numbers on 
> gravity pressure based on the distance dropped off the wagon and the 
> volume of water in the tank (of course this would change as the tank 
> drained) and I'd also need to figure this based on some standard 
> length header, drip line, etc.  This is one possible direction.
> The other is adding a pump to the system and utilizing a string of 
> sprinklers.  I could look at the low pressure mini-sprinklers we've 
> been utilizing.  Or explore slightly higher pressure system that would 
> reduce the number of sprinklers and make the string easier to move. 
>  This would prove helpful in having a fairly easily mobile means to 
> irrigate a small seeded/bedded crop.  We're on municipal water for our 
> main irrigation system so I have almost no experience with irrigation 
> pumps.  I can consider the length of the sprinkler line and the number 
> and type of sprinklers.  If I add up the GPM of each sprinkler head 
> I'd get the total needed GPM, I can look at the operational PSI of the 
> sprinklers and assume that would have to be my base pressure at 
> however many GPM.  I can figure out how quickly the 300 gallon tank 
> would drain and if I dug up the formula and crunched the numbers could 
> figure out how many acre/inches that would amount to.  I know trash 
> pumps, etc. are rated at how many GPM they move but don't think 
> they're probably capable of handling back pressure.  I'm assuming that 
> an irrigation pump has a GPM rating and is somehow rated for or set to 
> an operational PSI.  Would this require a pump with bladder tank or is 
> there some other system?   
> Anyhow this is just the trend of my thoughts here.  They're obviously 
> rather raw and I've got some homework to do and phone calls to 
> make....but bearing this info in mind if anyone has thoughts, ideas, 
> experience, etc. I'd love to hear from you.
> Thanks,
> Brian
> www.stonesthrowfarm.biz
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