Qanat Irrigation System

Timeline

1. -800–100Iranian Plateau and the edge of Mesopotamia · IranQanats consist of vertical shafts, underground channels, and open channels, using gravity to bring groundwater from foothill aquifers to plain farmland, achieving stable irrigation without pumping equipment; they spread rapidly in arid and semi-arid regions and became the agricultural foundation of Persian civilization.
2. 1371–1380Oases of Khwarazm and Transoxiana · KhwarazmIn the 1370s, oases around Herat, Mashhad, and Samarkand within Timurid domains all relied on qanats for water supply and irrigation; local administration and religious endowments (waqf) were responsible for channel dredging and shaft maintenance, ensuring water for urban food supply and gardens.
3. 1301–1400Turpan Basin, Xinjiang · XinjiangQanat technology spread eastward along the Silk Road to places such as Turfan, with mature applications in the arid regions of East Asia by the 14th century; muqanni (well-diggers) guilds in West Asia and Central Asia undertook surveying and construction, and water rights allocation was managed under Islamic law and local customary law.