Interesting, if I understand correctly. I once took on the onerous job of watering baskets 20' above me. A very cool guy told me to get an old hot-water heater. I could fill it, and with a short hose, sprayer unit I could easily spray into the baskets. Those things hold the city water pressure of 60psi without being hooked up to the city. And hot-water heaters are so very cheap. All I had to do was fill from the city's water. No need for drop to increase water pressure.
As for water features, I found the equation to compute evaporation on some of our large water-falls. I don't have it with me but I saved our company from having to tear the whole waterfall system (the cost was phenomenal) out to discover if there were any leaks. What we discovered is that if you are on city water don't even DREAM of a waterfall. The evaporation was huge! Plant transpiration wasn't even in the equation.
'Dry' water features, dry water falls, dry ponds, dry streams worked well accompanied by 'stero' water sounds from 'artesian' wells. We'd dig a big hole (5'deepX3'wide) line it twice with pond liner, fill with drain rock, 5 gallon pail to hold pump, blast water up to surface to bubble up 6", 1'or 1 1'2'...to fall back into its reservoir. Used a sensor to detect height of reservoir to be refilled automatically. Can't see why you'd need a timer for this, just a low-water sensor. Some days the heat will be so intense you might have to add a gallon or two, other times maybe a gallon every other day. Can't set a timer for that...an old toilet float would work.