A qanāt (Persian: قَنَات) or kārīz (کَارِیز) is a water supply system that was developed in ancient Iran for the purpose of transporting usable water to the surface from an aquifer or a well through an underground aqueduct.

Sep 26, 2024 · Access shafts play a vital role in the qanat system. They are vertical wells that connect to the main underground channel at regular intervals. These shafts provide ventilation, allowing fresh air to circulate through the tunnels.

Feb 8, 2021 · The qanat (called foggara in North Africa and the Levant, falaj in the United Arab Emirates and Oman, kariz in Iran, and puquios in Peru) is an ancient Middle Eastern irrigation technique in which a long tunnel is dug into arid land that allows water from underground aquifers to be accessed for use by the local population, supporting large ...

Aug 5, 2021 · A qanat is a constructed system of shafts and tunnels to intersect the water table beneath a hill, and to transport it by gravity to an exit point from where it is carried further along an open channel for human and agricultural uses in an otherwise arid environment.

Jul 13, 2020 · Qanat builders sank vertical shafts along the tunnel at intervals of 20 to 30 meters. This space was needed to remove excavated material and to provide ventilation and access for future repairs. The ancient Persian qanat water delivery system proved to …

Jun 20, 2018 · Simply put, a qanat is an underground channel that carries fresh water from an elevated source in the mountains to an opening at a lower altitude for the purposes of irrigation – a perfect...

May 8, 2014 · Qanats are used to move water from underground aquifers deep inside a hillside to lower elevations. The system is simple and basically consists of a gently sloping horizontal shaft (called qanat channel in picture) and vertical access shafts. Not surprisingly, the first step in constructing a qanat is finding the water.

In the system a shaft connects the qanat to the basement of the building to be cooled. Hot dry air enters the qanat through one of its vertical shafts (a) and is cooled as it flows along the water.

Jun 27, 2017 · Qanat (kariz) stands as a remarkable persian invention for water management in arid regions. This system harnesses subterranean water, directing it to cities and farms through a network of underground tunnels and ventilation shafts, significantly reducing water evaporation.

Nov 1, 2024 · Qanats transport water over long distances from underground sources to surface destinations, leveraging gravity in a sustainable manner. A typical qanat consists of a gently sloping tunnel, often several kilometers long, which channels water from an …