Persian Qanat

Timeline

1. c. -550–-330Around Persepolis · IranDuring the Achaemenid Empire, qanat technology was systematically applied to oasis agriculture in Fars and Khwarazm, supporting the empire's granaries and relay-road cities, and forming a government-supervised canal-building system.
2. c. 700–1130Khwarazm · KhwarazmAfter the Arab conquest, qanat technology spread with Islamic expansion to the North African Maghreb, al-Andalus in Spain, and Central Asia; Khwarazm, Nishapur, and other places became dense qanat regions.
3. c. 1131–1140Yazd · Yazd ProvinceUnder the Seljuks and Khwarazmians, Persian cities continuously maintained their qanats; shaft groups in places like Yazd sustained desert-oasis populations, while official and local water-rights systems regulated water distribution and repair obligations.
4. 2016Iran · IranQanats are inscribed on UNESCO's Representative List of the Intangible Cultural Heritage of Humanity; Iran and Xinjiang, China, promote transmission of traditional repair skills in response to deep-well pumps and desertification.