The Karez Well System is an important ancient irrigation system. It is made up of a horizontal series of vertical dug wells that are linked to each other by underground water canals. This system provides water to drink for local people as well as to water their crops. The water was collected from the mountains which are miles away from the farmland. Thus, this system transfers water from mountains in form of groundwater to people which are miles away.
Hence, the Karez well system transported groundwater from a distance.