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An ancient irrigation system consisting of a tunnel dug at a very slight upward gradient into rising ground so that water from deep within the earth runs out to the surface. Qanats were developed in Persia and later adopted throughout the Middle East and North Africa.

[Persian qanāt, from Arabic qanāh, qanāt-, tube, canal, qanat; akin to Hebrew qāne and Akkadian qanû, reed; see qnw in Semitic roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Civil Engineering) an underground channel for directing irrigation water
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Summary: TEHRAN (FNA)- A short documentary film of an Iranian director about millennial underground water systems of Iran, qanats, is slated to be screened at international film festivals in Spain and Romania.
Agriculture Minister Mahmud Hojjati said June 25 that the revival of qanats "is an indication that they [undefined] are finally paying attention to this issue after decades."
Water is conveyed by underground canals (qanats), excavated from a natural aquifer to the towns and gardens.
The zonal SPs in conjunction with ITP shall place the Jersey as and where required, and would also place Qanats on the rallies routes.
The especial architecture, untouched nature, millennia-old structures, ancient qanats, running rivers, and high-quality organic produce have turned the ecotourism accommodations into outstanding attractions.
It is worth mentioning that a total of 38057 candidates including 23459 male and 14598 female students were supposed to appear in the said entrance test at the above mentioned seven centers but due to heavy rain and storm at Mardan centre all the arrangements including tents, qanats and chair etc have been badly disturbed and even fallen to the ground.
Semsar Yazdi, a speaker on the concept of Qanat water management, and the Director of the International Center on Qanats and Historic Hydraulic Structures in Iran, explains that there are interesting facts about water management in Iran and Indonesia.
He added in the meantime five qanats have been damaged up to 30 percent each, while 40 wells are damaged up to 60 percent each.
Qanats were constructed across the Islamic world to deliver large quantities of water to the surface without a need for pumping; they were also used to transport water over long distances in hot climates.
Biological and morphometric characteristics of, Capoeta fusca, a cyprinid fish living in the qanats of south Khorasan, Iran.
Regarding the spreading of oil pollution, the oil pollution of groundwater taken from wells or Qanats has been verified.