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rleibman

Designing automatic irrigation software...

rleibman
18 years ago

I'm back to designing my (open source, free) irrigation software. I'll probably have a few questions as time goes on, here goes one:

- Assuming that a user is allowed to enter (for a given zone) an amount to water that zone on the longest day of the year.

How should I adjust the watering time based on the date?

I can (relatively easily, based on date/latitude) figure out many hours of sunlight there are.

Basically, what I'd like is an equation similar to:

Watering Time Today = (Hours of Sunlight Today)/(Maximum Hours of Sunlight on longest Day) x Factor x (Watering Time on Longest Day).

So I'd like to know if anybody has a good guess for what that factor is (perhaps 1?)

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