Daily News Analysis

Qanat system- Water Conservation

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Some of Africa’s dry areas face serious water shortages due to minimal rainfall. An ancient system of drawing water from aquifers, the “qanat system”, could help.

Qanat system

It is an ancient type of water-supply system, developed and still used in arid regions of the world.It taps underground mountain water sources trapped in and beneath the upper reaches of alluvial fans and channels the water downhill through a series of gently sloping tunnels.

  • The qanats have been used for centuries in arid and semi-arid parts of north Africa, the Middle East and Asia, where water supplies are limited.
  • It’s known by a variety of names, “foggara” in north Africa, “falaj” in Oman and “qarez” in parts of Asia.
  • Many old qan?ts are still used in Iran and Afghanistan, chiefly for irrigation.
  • It’s a system that’s managed by everyone and its benefits are shared.
  • Some of the region’s qanat systems, like those in Iran, are protected under heritage status.
  • Significance of the system
    • The qanat is sustainable as it works with gravity and no electricity is needed. It can even be used to create clean energy.
    • Water lost to evaporation is minimal in comparison to surface water supplies.
    • It can have a wide scale impact. Qanats are multiple kilometres long and once this water hits a floodplain, it can irrigate multiple hectares of land.
    • It fosters social cohesion. Many people, with different skills, are involved in maintaining the system.
    • The lifespan of the system extends beyond that of a deep water well, which is only about 20 years. Tunnels do not clog as easily as wells.
    • The quality of water coming from the mountains is much better than water on the plains. It’ll have lower salinity and be better for crops and people.

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