Hi Guys

I have bought a "Shaker Sprinkler" from Bunnings some time ago.

I am quite impressed in the small amount of water it uses to cover a wide are.

It flicks the water in a random pattern that covers a large area despite being on a low tap pressure very similar to rain drops in my opinion

Check them out at Bunnings, not sure if this is mine as it is turned on atm and I dont wish to get wet. ( Mine is blue)

http://www.bunnings.com.au/holman-large-shaker-7450h-sprinkler_p3120715

Sounds like a good way to maximise evaporation. You could put it on the roof to cool the house down.