I've calculated around 7,000 gallons each time I water (every other day). My yard is roughly 3/4 acre or 32,670 sq ft. If the water is delivered perfectly, that means 7,000/32,670 = 0.214 gallons per square foot or 0.107 each day. That's 0.856 pints of water on each square foot. Considering I've been generous with my quantities above, I'll just say I'm putting down 1-1/2 pints of water on each sqauare foot every other day. You'd think that would be plenty, but there are places where the grass is gasping for a drink on the evening of the 2nd day before the next morning's watering.
The evaporative power of the sun is unbelieveable. My deep pond is dropping 6" to 8" per week, but still has plenty of water. The level is down about 2-1/2' total. Because of the slope of the sides, I'd say that 2-1/2' is probably 1/3 of the total volume of the pond. I've seen lots of dry ponds, but mine is holding well, all things considered.
Jim,
If you have 32,670 sq ft of lawn to water, that is x 144 sq inches in a square foot which equals 4,704,480 sq. inches. If we use an amount of water per week to equal 1 inch deep, then we have 4,704,480 cu. inches of water. 1 Cubic Inch = 0.00432900433 Gallons [US, Fluid]
4,704,480 cu in x 0.00432900433 equals 20,366 gallon per week required.
If we interpret your statement above to be 7,000 gallon every other day that equals 3,500 gallon per day. So if you are watering 7,000 gallon every other day which would be 4 times in every 7 days you are pumping 24,500 gallon per week to your yard.
However, if you are only watering 2 days a week for a total of 7,000 gallon you are only putting one third of an inch of water on the lawn.
If you are watering 3500 gallon in a 6 hour period that is 10 gallon a minute so your pump must be higher capacity than that.
If you are only watering every other day but pumping 7,000 gallon in a 6 hour period that is 20 gallon per minute dedicated to lawn watering.
We are not quite sure of how to interpret your explanation of your watering method?
Our pond was down 19 inches when I measured it on Saturday, last.
Of course we have had more rain than you guys, but we have had years when it stays full. The dog found a "snake in the weeds"
Ron