The Persian Qanat

The Persian Qanat refers to the traditional underground aqueduct system developed in Iran to supply water in arid regions by channeling groundwater to the surface through gently sloping tunnels. Qanats are engineering solutions that allowed settlements and irrigation in dry landscapes.

Surviving qanat systems include visible vertical shafts and surface outlet points where water emerges into distribution channels, and some sites have associated settlement remains or irrigation features. Visitors can often see the sequence of vertical access shafts that ventilate and maintain the tunnel, and in places there are interpretation panels or small museums explaining the technology. Qanats vary greatly in length, from hundreds of metres to many kilometres, depending on local hydrogeology.

Qanat technology developed and was refined over many centuries in Iran and adjacent regions as communities sought sustainable access to groundwater without mechanical pumping. Qanats were constructed through coordinated communal labour and required regular maintenance; they underpinned agriculture and settlement patterns in arid zones. With modern pumping technologies some qanats fell into disuse, but many remain as important heritage features illustrating historical water management.

Qanats are located across arid and semi-arid provinces of Iran, often in plains and foothill areas where underground water tables could be tapped. Specific sites are typically accessed from nearby towns or village settlements and form part of local agricultural landscapes.

• How qanats work: Qanats are underground water channels that tap aquifers and bring water to the surface by gravity, often running for many kilometres and ventilated by vertical shafts.