In brief
Channels, tunnels, mills and control facilities form a common infrastructure. The individual waterfall does not explain the entire site.
Useful to know
Shushtar's historic hydraulic system in Iran combines diversionary canals, tunnels, mills, bridges, pools, and control facilities. UNESCO describes the drainage of water from the Karun River and the supply of city and agricultural areas. [1]
This is infrastructure architecture: meaning is manifested through the connections and movement of water. The beautiful shot of falling water shows only one part of the organization.
Practically traced the path of the water on a scheme: diverting, bringing, using and taking away. You don't need to know every technical detail to distinguish a facility that carries water from one that uses its movement.
Don't attribute all parts to one building moment. The source looks at historically accumulated knowledge and influences. [1] For a specific date of a bridge or mill, a separate description is needed, rather than the general beginning of the whole system.
Sources
For further detail and to check the information: