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However, a recently discovered falaj system in al-Ain, UAE, dates to 1000 BC, and another in Umm Safah, Sharja, dates to the Iron Age. Also, a qanat-like system called the Turpan water system originated in China during the Han Dynasty (206 BCE – 24 CE).. — “Qanat - Wikipedia, the free encyclopedia”, en.wikipedia.org
A qanat is an underground water management system consisting of vertical shafts connecting to a sloping tunnel designed to provide a supply of fresh water. The Raschpëtzer is a particularly well preserved example of a qanat and is probably the most extensive system of its kind north of the Alps. — “Raschpëtzer Qanat - Wikipedia, the free encyclopedia”, en.wikipedia.org
Qanat received a peer review by Wikipedia editors, which is now archived. I would have been disastrous to dump my specific article about a specific place into that huge wandering article on Qanat. — “Talk:Qanat - Wikipedia, the free encyclopedia”, en.wikipedia.org