New animated case study from Greece: The Hortiatis qanat

The qanat ancient technology is based on excavating tunnels of low slope, to reach an aquifer and transfering its groundwater to the surface without pumping. 

In modern Greece, the biggest known qanat is found at the outskirts of Thessaloniki. The qanat of Hortiatis (or Agia Paraskevi for the locals) feeds from the rich in water Hortiatis Mountain and is linked to an aqueduct of 20 km that ends in Thessaloniki city. This qanat was originally dated in Ottoman Era, but according to more recent research it is probably dated in Roman Era. It constitutes an excellent example of the ancient water drainage system, which has strongly influenced the city’s socio-economic organisation. The qanat’s subterranean channels (tunnels), excavated probably during the Roman period, have been used for exploitation and transfer of groundwater from the mountainous terrain to the surface without pumping.

Read the full text of the case stude entitled "The Hortiatis qanat, the biggest known qanat of Greece" and view the animation explaining its function here: