Before I burned my yard, I had to put down 1.5" a week all in one day to keep my yard nice and green. I did it by running the system in the morning and the afternoon on my day off the week.
Wow your situation sounds a lot like mine. I just came over to this site and the principles of 1 inch of water once a week. My front lawn will not take that much water before serious runoff. This is my latest plan to try and help it:
Goal - apply 1 inch of water or close to it on all six zones for the front yard without excessive runoff.
On previous water cycle my start time was 2 am, 4am, 6am and 8am with each zone at 19 min.
New proposed cycle start time 5am, 6am, 9am, 10am, 2pm, 3pm,6pm 7pm with each zone at 9 min. This should eliminate the runoff loss but will it provide the water needed to get close to 1 inch per week?