Karez

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Karez

 

(Persian; literally, an underground irrigation channel), an underground structure for collecting groundwater and conveying it to the surface. Such structures are in use in the mountainous and foothill areas of Middle Asia and Transcaucasia. Water from a karez is used for water supply and irrigation.

A karez consists of one or more water-catchment tunnels 1.0–1.4 m high and 0.5–0.6 m wide, with reinforced walls laid through a water-bearing horizon, as well as vertical ventilation wells and a water tunnel connected to a discharge channel. Karez tunnels can be as much as several kilometers long. The average yield of a water-catchment tunnel is 0.3–0.6 liters per sec per meter of the tunnel.

References in periodicals archive ?
Due to its climate, it has one of the largest networks of underground aqueducts (qanats) in the world, and its qanat makers are considered the most skilled in Iran.
It turns out that there are similarities between Balinese Subak traditions and the Qanat tangible cultural heritage of Iran, even though the countries are 80,000 kilometers apart," he explained.
Written by Badawi Habak Translated by Rasha Zantout NNA - The road that leads to the church and grotto of Saint Shallita takes you through the village of Qanat to the farm of Bani Saab, then the valley of Saint Shallita in Bcharre district.
The Doha project has undergone its fair share of challenges from the time its construction started in 2004, however master developer United Development Company (UDC) has confirmed 100% of the infrastructure of the man-made island, as well as the Porto Arabia, Qanat Quartier and Medina Centrale districts, is finished.
The study by Balali and his colleagues of Iran's Qanat irrigation system, and of the interaction between the environmental implications of Islamic beliefs and the modern imperative of control over nature, demonstrates the formation of a post-colonial perspective on water that combines modern and traditional components.
Ghulam Farooq Barakzai, the Review Board member Abdul Shakoor Dadras, Abdul Karim Qanat and Defence Ministry official Anwar Shah.
Radars will be set to 121 km/h in both directions from Al Qanat Bridge (the Channel Bridge) to Sheikh Zayed Bridge, to catch speed violators.
Se enfatiza la relevancia del qanat, una tecnologia originaria de la antigua Persia, que llevaron los musulmanes a Andalucia y que fue la que se uso en la construccion del acueducto del Cedazo.
Abdullah, a resident of Qanat Al Qasba, said: "I am so glad that Sharjah has implemented this ban.
During winter these channels flooded with water, derived from the qanat irrigation system, through runoffs from mountains areas.
99 per cent during UDC's open house promotion at the Venetian-inspired Qanat Quartier, from 6-8 November 2013 at the Pearl Qatar.
The funds will be channeled to the purchase of the remaining residential units at Qanat Quartier project, being developed by the UDC on the Pearl-Qatar artificial island here, according to press release by the bank.