We noticed a large amount of water running down the street gutter while working at a jobsite and walked up the hill to
Here is more info regarding just how much water. This style of nozzle can easily push ~1.4 gallons per minute. With 7 heads in this small area, and a zone running for 10 minutes, a total of just under 100 gallons of water was being applied to this very small area. The other problem is that the volume is being applied so fast that the ground cannot absorb it, so it runs off and down the street. If the irrigation system is not on a regulator and is running at a higher psi, it will be putting out even more gallons in the same time period.
A proper fix would be to remove some of the existing heads and have maybe 4 heads for the entire area, allowing overlap of the heads. Then, the nozzles should be replaced with a different style that will deliver the water at a slower rate. There are nozzles that apply water at ~0.38 gallons per minute. By changing the nozzles, the water will be applied at a rate that the soil can accept more of it with less ...»