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Irrigation

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Re: Irrigation

Post by Balinbear on 21st September 2014, 18:41

I meant to add that with a dead end the pressure decreases the further you go along the line.
Friction losses affect the pressure and the pipe size needed to maintain the pressure. The longer the pipe the greater the pressure loss due to friction (whether it be a loop or a dead end).

Also if you rely on holes in the pipe for the irrigation the pressure coming out near the source of the water will be far greater than at the end of the pipe so you need to allow for this with the holes size or you can use the pressure sensitive ones that only release the amount of water that is set in the sprinkler.



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Re: Irrigation

Post by Ausrose on 22nd September 2014, 07:52

Also if you rely on holes in the pipe for the irrigation the pressure coming out near the source of the water will be far greater than at the end of the pipe so you need to allow for this with the holes size or you can use the pressure sensitive ones that only release the amount of water that is set in the sprinkler. wrote:


This is a problem I am grappling with at the moment.

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Re: Irrigation

Post by The Lazy Rosarian on 22nd September 2014, 17:34

What sort of pipe have you got Doug, normal blank black or brown ?
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Re: Irrigation

Post by Ausrose on 22nd September 2014, 17:40

Black.

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Re: Irrigation

Post by The Lazy Rosarian on 23rd September 2014, 06:05

Doug, is your looped or open ended ? You mention "holes" are these made by you ?.
With my old irrigation, "many moons ago" I had two sorts. One had "inline" drippers. These had a small hole in the poly and on the inside of this there was a small maze which was configured to release water at a pre-determined rate, mine was 2lts/h. I went away from this as they can get clogged with fine soil particles from my well. I went to blank poly and inserted individual drippers again at 2lts/h, these are place at what ever spacings I need, the ones I purchased can be removed and cleaned. The other thing I purchased was a mesh filter($210.00) to remove any particles, works perfectly, no more impurities. I will attach some photos later.
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Re: Irrigation

Post by The Lazy Rosarian on 23rd September 2014, 06:48

This is the inline dripper,
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This is the same dripper cut to show the maze and impurities,
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This little green dripper are my new one's and run at 8lt/hour,
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Here is a shot of them either side of a rose, not a good shot but will give the idea,
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Re: Irrigation

Post by Ausrose on 23rd September 2014, 18:36

Hi David I have the green topped adjustable droppers however I haven't had the time or perhaps the expertise to make the necessary adjustments. The advice from this thread has motivated me to see if I can adjust the drippers as this will save a lot of water that is presently being wasted.

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Re: Irrigation

Post by muscovyduckling on 24th October 2014, 08:10

I stumbled across this website last night and found it very helpful. It's probably waaaay too basic for most of you, but I'll post it up anyway just in case there are some novices like me out there reading this Smile

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I especially liked the information regarding setting up drip irrigation on a sloping site.
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Re: Irrigation

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