Features Common To Regions Which Use Qanat Technology
The qanat technology is used most extensively in areas with the following characteristics:
- An absence of larger rivers with year-round flows sufficient to support irrigation.
- Proximity of potentially fertile areas to precipitation-rich mountains or mountain ranges.
- Arid climate with its high surface evaporation rates so that surface reservoirs and canals would result in high losses.
- An aquifer at the potentially fertile area which is too deep for convenient use of simple wells.
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