With the growth of urban settlements during the ages, locally dug deep wells (up to 100 meters deep) could no longer keep up with the demand, leading to the systematic digging of a specialized network of canals known as Qanat.
S rastom urbanih naselja tijekom stoljeća, lokalno iskopani duboki bunari (duboki do 100 metara), više nisu mogli držati korak s potražnjom, što je dovelo do sustavnog kopanja specijalizirane mreže kanala poznate kao kanati.