 If it's running off, it doesn't get to soak in, then maybe you need to put a lower gallons per hour for a longer period of time to get the same effect, to get more water into the soil without the runoff. Your sprinkler systems are gonna be the same way. Whether you've got a sprinkler system that is in the ground and that you have an actual system that you set up, or whether you've got a sprinkler from Walmart that you hook up to a water hose and drag around the yard,