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.
Specifications: Inlet Size: 1/2″ MPT (15/21) Nozzle Outlet Trajectory: 25° Precipitation Rate: 0.41 to 0.66 inches per hour (10 to 17 mm/h)
When an inch of water reaches the ground, it penetrates various depths. In sandy soil, that one inch will soak down to almost 30 inches. In loamy soil, the same rainfall will soak down to approximately 15 inches. In clay soil, it will soak down to 9-10 inches.
One (1.00) inch of rain – A light moderate rain never reaches this amount, heavy rain for several hours (2-5 hours). There would be deep standing water for long periods of time.
The high volume pressurised water stream gets harder to be distributed evenly. Thus, that size of impact sprinklers have another small (4-6 mm) nozzle to water the area for the closer area to the sprinkler. The main stream will start spreading in the air after a certain distance to the sprinkler head.
We're Talking PSI
The optimum operating pressure for most residential sprinkler heads is between 30 and 50 pounds per square inch (PSI).
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.
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.
Watering every day is not advised. It should be done 2 to 3 times per week only to prevent a shallow root system. If possible, water during the early morning hours to ensure that the lawn dries entirely before nightfall. However, watering at any time of the day is better than not watering at all.
This will primarily be determined by the total flow rate and pressure you have available at your source. For example, you generally have a flow rate of 10 gpm from a ¾-inch spigot where you connect your hose. With your 10 gpm flow rate at your spigot, you could run two sprinklers at 5 gpm each.
Typically, though, a sprinkler system zone will boast 5 to 6 rotor heads and/or 8 to 10 spray heads.
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.
Our Recommendation… If you have a rectangular shaped yard with no obstacles, we would recommend the oscillating sprinkler, as it will typically cover the whole yard if placed correctly. Also, if you have newly planted grass seed, this is the sprinkler to use.
Gear-Driven Rotor Sprinkler Heads
They offer a multitude of advantages over impact rotors, such as low cost, quiet operation, and various spray patterns. Gear driven rotors often require less maintenance because the enclosed body protects the drive mechanism from dirt and lawn debris.
The impact sprinkler's long spray radius and uniform water distribution re-creates the effect of natural rainfall. The device provides an above-ground alternative to furrow irrigation, in which trenches are dug between rows of crops and flooded.
If you notice one sprinkler head that doesn't seem to be going as far as the others, you may have a clogged line. If the entire system is falling short of what you expected, however, you may have an issue with the backflow preventer or simply low water pressure.
How many inches of snow equals one inch of rain? On average, thirteen inches of snow equals one inch of rain in the US, although this ratio can vary from two inches for sleet to nearly fifty inches for very dry, powdery snow under certain conditions.
The amount of rain considered a lot in an hour can vary depending on the location and the type of precipitation. However, generally, rainfall rates of 1 inch (2.54 centimeters) or more per hour are considered heavy or intense, and may cause flash flooding and other hazards.
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.