Thanks for that.
Okay, 0.17" of water times 5.9" root depth times 50% Allowed Depletion gives .5" of water per time. With .22"/hr that gives 2.28 hours, with .35"/hr that gives 1.43 hours. Times will be somewhat longer due to Efficiency and Sunlight.
I notice your efficiencies are really low. You used catch cups, and I’m sure your readings are right, but I’ve found that catch cup placement is EXTREMELY critical. You can have large swings in efficiency based on where you put your catch cups. Have you noticed some areas of each zone that absolutely don’t get enough water? If so, can they be corrected by adjusting the sprinkler heads?
My efficiencies are quite low on some zones too. But I’ve used efficiencies of 70-80% in the program because I’ve not noticed any areas that stay too wet or too dry, despite my catch cup measurements. Doing this will reduce your total watering time, reducing water usage. You can always compensate if you need to elsewhere.
Are your 8 similar zones on the same schedule? If so, the soak phase can be accomplished while other zones are being watered. If not, and if 2 or more schedules occur on the same day, one schedule must complete, including soaking time, before the next can start and it can take longer. That doesn’t mean that watering will always take place on the same day for all 8 zones; it just means they’ll be all considered when watering.
While variations in each zone can end up changing what zones water together, you can force them to be different by manually watering some zones, adding extra water to the zone and postponing watering of that zone. I do that once in a while, so all my zones don’t water the same day, taking longer than I’d like.
For the Spray zone, 0.17 x 15.8 x .5 = 1.34" of water at once, needing 1.34 / 1.3 x 60 = 62 minutes. Again, efficiency and sunlight will extend that. Application factor based on efficiency of 31% is 1.7, but 1.7 x 62 = 105 minutes, not 88 minutes. Perhaps it’s applying somewhat less than the 1.34". That’s a LOT of water to apply at once, so I’m guessing it is. That zone is apparently shrubs, which can be watered deeply, but that still seems like a lot of water to me, unless it’s a drip zone. I’m not as sure about it.
Right now, the National Weather Service for the northern New Jersey area, the FRET value is about 0.95" per week (go to link, in second dropdown, go to the bottom to Weekly FRET). For your Crop Coefficient of 78%, that means your 8 zones should get about 0.95 x 0.78 = 0.74" of water a week. With those zones getting about 0.5" per time, Flex Daily should be watering about every 0.5 / .74 x 7 = 4.7 or 5 days. It will get shorter as weather warms up.
For the Spray zone, you only need 0.95 x 50% = 0,48" of water per week. Applying over 1.3" of water at a time, again, seems way too high, resulting in watering only every 2-3 weeks, which doesn’t sound healthy for shrubs to me. If you’re sure of the 1.3" per hour, I’d reduce the root depth to maybe half of what is is, so as to water more often with less water. Just guessing here.
Hope this helps. Continue with the questions; I’m sure you’ll have them.