[zeristor]

I don’t know why I find water harvesting so fascinating, nifty use of aquifers.

There was a civilisation in the Sahara that had tunnels in the mountain that provided water, I imagine they ran dry.

Persia had (has?) underground tunnels that convey water to farmland.

With the increasing amount of heavy rain fall I’m not sure how much of that can be caught and sequestered.

This was made all the more apparent when there was a sudden downpour in London some years back and the river Fleet, sewer as it is now backed up into the office’s canteen.

[pfdietz]

It wasn't in the Sahara, but the civilization at Petra (in what is now SW Jordan) was built around sophisticated hydraulic engineering.

It eventually collapsed when earthquakes damaged the system beyond their capacity to repair. Being subjugated by Rome didn't help.

https://www.youtube.com/watch?v=qSfFq02pK4s

[User23]

> There was a civilisation in the Sahara that had tunnels in the mountain that provided water, I imagine they ran dry.

Was that the Garamantes?[1]

[1] https://en.m.wikipedia.org/wiki/Garamantes