> If this was established by the Moors then I would guess other ex-Moor states would have a similar setup.
Sure thing! In Madeira they have many ancient aquaducts originally estabilished by the Moors:
https://en.m.wikipedia.org/wiki/Levada
Ancient water management is a fascinating topic.
The qanats in the middle-east, and north africa are particularly interesting. They are underground water conduits and sources dug by human muscles alone.