A qanāt (from Arabic: قناة‎, in Persian: کاریز‎ kariz) is a water management system used to provide a reliable supply of water for human settlements and irrigation in hot, arid and semi-arid climates. Qanats are also called kārīz (or kārēz from Persian: كاريز‎) (Iran, Afghanistan, Pakistan and Central Asia, derived from Persian: كاهریز‎), kahan (from Persian: کهن‎), khettara (Morocco); galería (Spain); falaj (United Arab Emirates and Oman); Kahn (Baloch) or foggara/fughara (North Africa). Alternative terms for qanats in Asia and North Africa are kakuriz, chin-avulz, and mayun. Common variants of qanat in English include kanat, khanat, kunut, kona, konait, ghanat, ghundat.

The qanat technology is known to have been developed by Iranians sometime in the early 1st millennium BC spread from there slowly west- and eastward.

The value of a qanat is directly related to the quality, volume and regularity of the water flow. Much of the population of Iran and other arid countries in Asia and North Africa historically depended upon the water from qanats; the areas of population corresponded closely to the areas where qanats are possible. Although a qanat was expensive to construct, its long-term value to the community, and therefore to the group who invested in building and maintaining it, was substantial.

Read more about QanatTechnical Features, Features Common To Regions Which Use Qanat Technology, Impact of Qanats On Settlement Patterns, Construction, Shareholders

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Gonabad - Qanats
... Some of the longest and oldest Qanats of the world are located in Gonabad ... Qanats of Uroune, Moun, Chahak and Shirin as registered in world heritage site (administered by UNESCO) are among these Qanats ... Gonabad qanat is one of the most wondering man made structure and even we can call it 8th of the wells of Gonabad qanat is as deep as 360 metres and the ...
Shabestan - Cooling
... A shabestan can be cooled using a Qanat in conjunction with a wind tower ... Incoming air is pulled from a qanat below the house ... pressure (see Bernoulli effect) and pulls cool air up from the qanat tunnel below the house ...
Windcatcher - Function - Upward Airflow Due To Temperature Gradient - Wind-assisted Temperature Gradient
... Windcatchers are also used in combination with a qanat, or underground canal ... The hot air is brought down into the qanat tunnel and is cooled by coming into contact with the cool earth and cold water running through the qanat ... The effect is magnified by the water vapour from the qanat ...
Qanats By Country - The Americas
... Qanats in the Americas, usually referred to as filtration galleries, can be found in the Nazca region of Peru and in northern Chile ... The Spanish introduced qanats into Mexico in 1520 AD ...
Raschpëtzer Qanat
6°8′33.83″E / 49.6689611°N 6.1427306°E / 49.6689611 6.1427306 The Raschpëtzer Qanat is located NE of Helmsange in the commune of Walferdange, 10 km north of the City of Luxembourg ... 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 ... is a particularly well preserved example of a qanat and is probably the most extensive system of its kind north of the Alps ...