Spray irrigation is your typical sprinkler head spraying water over your grass to keep it alive. Spray irrigation causes a lot of waste and in some instances damage. The water is shot into the area and the direction it travels in is dictated by the nozzle in the sprinkler head, however on a windy day the water can be easily blown in the direction of the wind. Water is a solvent and when it consistently comes in contact with concrete or stucco it will cause deterioration over time.
Over spray is another issue with spray irrigation, over spray is caused when the nozzle is too large for the spot it was designed for and it sprays over and past the grass. Over spray is a main cause of water waste as it is not delivering the water to where it was intended, a quick adjustment or replacement of this inexpensive part can save a lot of water.