Amateur hour continues. I have now asked you in at least two different threads, if not three, to demonstrate how to do this on a simple landscape, and yet you cannot. That alone speaks volumes.
I have a SMS buried at 6" and a soil with a WHC of 4.0 in/foot with an general infiltration rate of 0.33 in/hr. The current volumetric water content at 6" is 40%, and decreases by 5% for every inch to the surface (35% at 5", 30% at 4" .....etc.). A passing thunderstorm dumps 0.5 inches of water in a 1 hour period. Coincidently, an irrigation cycle with a runtime of 30 minutes is scheduled to go off 15 minutes after the storm passes.
How long will it take for the wetting front from the storm to reach the SMS (assuming no surface crusting)? How much water will run off from the rain event?
Given a SMS works by allowing irrigation once a specific soil moisture level is reached, lets say 55% volumetric, and suspends irrigation once soil moisture reaches field capacity, detail exactly how a SMS will suspend irrigation during the above rain event.