Shushtar Historical Hydraulic System
Hydraulic system has been built in a city called Shushtar, formerly called Adamdun, during Sassanid dynasty. Adamdun was changed to Surkutir in the time of Achamenian. This city now is called Shushtar. It originates from the name of another ancient city, called Shush. The definition of Shush, Persian pronunciation of the word Susa, is good and Shustar`s definition is better. A local folkloric story says that Shushtar or Susiana is the name of a local flower, like Susa.
As it was aforesaid, during the Sassanian era when the city was called Adamdun, and it used to be an island on the Karun River, it was selected as the summer capital. The engineering of that time in the capital was channeling. It was done in order to dig a moat around the city. It was formed while bridges, gates, and entrances into Shushtar were built to all directions except north. There were many rivers nearby which were for fertilizing agriculture.
There are three main water tunnels that come from behind side into the water mill and make many water mills run or work to transform wheat to powder. There are amazing model of haltering in water mills and water falls.
It is believed that it has been Darious the great who has made some parts of the irrigation system.