Ok, to clarify - I have a large rectangular back yard. It is watered by 3 zones, with a sprinkler head layout similar to what you would do if it was a single zone. Requirements for each zone are basically same (but not exactly - slope on C side and a bit more sun). The yard is split into zones due to water pressure I'm sure. We moved into the house.
Each head is appropriate 90/180/360 for it's placement.
A A B C
A B B C
A B B C
A B C C
I do want the estimated gallon usage to be as accurate as possible,it is critical with tiered water rates. 1k gallons can get up to $16. I don't consider that "advanced".
I'm hoping the zones are similar enough that the that the sections that are covered by overlap will get reasonable amount of water.
I tried to back into the PR with some math -
- I measured area, assuming the overlap was split between the two
different zone heads hitting an area.
- I measured the GPM at the meter when each zone was running.
- I then calculated the PR based on area estimate and GPM.
As a double check, I added up all the GPM and the total area and I got a similar PR. Even better, it pretty closely matches the specifications of the heads I'm using
In the future, like you said, I'm thinking I may have to add/adjust some sprinkler heads. Might also have to mess with the effeciency setting.