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How much water y'all use?

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7.2K views 8 replies 7 participants last post by  Lawndress  
#1 ·
I'm curious what's considered normal water usage per thousand (regardless of all your variables), for people like yourself that understand ETo. Am I grossly under watering?

I'm roughly around 650gal total for one morning of turf zones with ~45min soak delay between their second run. That's roughly 41 gallons per thousand? 767gal if you include shrubbery. I water roughly every three days, depending on conditions and fungus pressure.

16k turf total, roughly 2/3 Bermuda and 1/3 Zoysia, all irrigated. Six zones on hunter I20 SS PRB(40psi) rotors with 2gpm nozzles. Two zones on hunter mp rotators, one of which is shrubbery.

Bermuda is in/on subgrade quality rocky clay on a clay shelf with no drainage, and the zoysia is in/on sandy loam with fast draining vole tunnels ;) .

CEC ranges from 5.8 meq/100g to 13.7 meq/100g, but mostly toward 6.

OM ranges from 3.1% ENR106 to 6.6% ENR176, but mostly towards the low end, probably <4%.

OpenSprinkler compensates program run times based on this ETo:



My water usage this morning was around 767.5gal, which included shrubs:



 
#2 ·
620 gallons = 1in of water to 1000sqft.

I do around 0.5in every 3 days in the peak of summer.

You used 650 gallons to 18k sqft. That's around 1/18 of an in of water. That's barely anything assuming your flow meter is correct.

Check the ET irrigation thread for more info.
 
#6 ·
Took 500 minutes (8.3h) to put down ~4000 gallons, roughly .36in/M for 18k. I was aiming for quarter inch, but the ETo was at 139%. So if you adjust it down 39%, my baseline program is around .22in/M?

So if there is zero rain, I can expect a two month water bill of about $1157 ($593 of that would be sewage charge) for turf. If I get an irrigation meter (~$3500), the two month water usage for just the lawn is around $563. A lot of assumptions in that quick math, just spitballing here. Roughly a 12 warmer month ROI, so <3y to break even on irrigation meter install? Sounds worth it.

Anyone have or get an irrigation meter? Worth it?
 
#7 ·
@CAB - I also got a quote for a separate meter that's about a 3 year ROI. It's been 3 years since I put irrigation in and haven't done it 😂

I have 3000 sq ft and it's $150-$250 a month for me (I don't have the gallons handy) for irrigation and 2-3 showers a day for my wife lol