If you water for 15 minutes and get 1/4 inch of water, you know you need four times that amount of time to get to an inch. That means you need 60 minutes of watering a week to keep the lawn healthy. If 15 minutes on your sprinkler provides half an inch of water, you only need 30 minutes total a week.
On average, it will take 30 minutes to get a half inch of water. So, 20 minutes, three times per week will give a lawn about an inch of water. This formula works best with healthy, well-cultivated soil.
With advice from your landscaper you set the sprinkler system to run 30 minutes or maybe even an hour per zone every day or two... because, after all, it's summer and the weather outside is very hot and dry.
The answer is that it usually takes up to 30 minutes to get a half inch of water. Watering 3 times per week equals to an inch of water on a lawn. Plants can be watered 1 to 2 times a week in seasons where there is a higher chance of rainfall and less evaporation.
For instance, if it took one minute to fill a bucket, you know that watering from the hose for one minute will deliver about 5 gallons of water. Three minutes will deliver 15 gallons, or the 1 inch needed. The 15 gallons can be delivered all at once within a week, or in two or three applications.
For vegetables in the summer, we recommend applying about 1 inch of water over the surface area of the garden bed per week. That is equivalent to 0.623 gallons per sq ft. Using that rate, a 32 sq ft bed requires 20 gallons of water per week. (32 sq ft x 0.623 gallons per sq ft = 20 gallons per week).
If your sprinkler output is 1½ inches per week, your sprinklers should run for only ⅓ hour or 20 minutes that week (½ divided by 1½). On a twice-weekly watering schedule, run your sprinklers 10 minutes each time.
For conventional sprayheads, precipitation rates typically range from 1.3 inches to 2 inches per hour. For gear drive rotors, precipitation rates typically range from 0.4 inch to 1 inch per hour. For rotary nozzles, precipitation rates typically range from 0.4 inch to 0.6 inch per hour.
How often should plants be watered? Water once or twice per week, using enough water to moisten the soil to a depth of about 6 inches each time. It's okay if the soil's surface dries out between waterings, but the soil beneath should remain moist.
Wetting leaves.
Plants get their moisture through their roots, not their leaves. Direct watering to the soil surface and avoid wetting leaves because water helps spread some plant diseases. Use a watering wand to reach ground level or a soaker hose or trickle irrigation system to wet the soil rather than the leaves.
Your goal is to irrigate enough in one day to soak just past the root zone, then let the soil dry down a few days. The best time to water is in the early morning hours. Allow 30 to 60 minutes between watering cycles so water has a chance to soak in the soil. The heavier the soil, the longer the soak time needed.
The average system uses approximately 15-16 gallons per minute, per station.
Sprinklers should be set to run for about 30 to 35 minutes at a time twice a week. Your goal is at least 1″ of water a week for your lawn. When it's hot and dry, double the water times while still trying to water just 2 or 3 days a week.
1. Water Thoroughly: Rotor zones should run for about 30-40 minutes per zone and spray zones 10-15 minutes per zone. 2.
Nothing should be in that area between the bottom of the sprinkler heads and the imaginary horizontal plane parallel to the ceiling that is 18 inches below. This is done to allow an even and unobstructed spray pattern from the sprinklers when triggered to extinguish the fire.
A common rule that is followed for obstructions within 18 inches of the sprinkler deflector is the “three times rule”. This requires sprinklers to be positioned away from obstructions a minimum or three times the maximum dimension of the obstruction.
Having your sprinkler set to run in the early morning ensures that your grass has time to absorb the water before the heatwave starting around noon.
Avoid watering grass on a hot afternoon when it's 95 degrees or higher. The best time to water grass is at dawn or in the early evening. Water deeply three times a week instead of a little water daily. Test whether your sprinkler system is watering your lawn evenly.
One inch of water or rain is equivalent to 623 gallons per 1,000 square feet.
1 inch by . 10 (the inches per min) = 10 minutes to get 1 inch of water. Remember this is the amount of water per week. We can divide the 10 minutes by the number of days we want to water.
Volume and weight
One inch of rain falling on 1 acre of ground is equal to about 27,154 gallons and weighs about 113 tons. An inch of snow falling evenly on 1 acre of ground is equivalent to about 2,715 gallons of water.