» Henry Gubler believes that around 800 BC. coal miners in north eastern Iran improvised some canals in order to extract the water from the coal mines. The technology was gradually applied by farmers and spread all over the plateau of Iran. About 525 BC. it reached Oman and Saudi Arabia by Iranians and Persian campaigns conveyed this technology through Egypt about 500 BC.
Qanat was introduced to Africans by Muslims and Yafuga (a Qanat) was created in Madrid by Muslims about 750 BC. The Spanish initiated qanats in Mexico in 1520 AD. From there, it was taken to Los Angeles in 1520 AD. This Hydraulic system was spotted in Chile , too. Creation of qanats in Asia enjoys great antiquity as well.