A qanāt (قناة, Persian: قنات) is one of a series of well-like vertical shafts, connected by gently sloping tunnels. Qanāts create a reliable supply of water for human settlements and irrigation in hot, arid, and semi-arid climates. The qanat technology is known to have been developed by the Persian people sometime in the early 1st millen...
underground tunnel for carrying irrigation water