Watermill Cascades below a River Canal

Watermill Cascades below a River Canal is an original illustration set in Shushtar Historical Hydraulic System, Iran. It lies in the subtropics, where the climate is hot semi-arid steppe.

A broad masonry canal reaches an old river city, divides through dark tunnel mouths beneath brick-and-stone mill chambers, and bursts into many white cascades across a cliff-like terrace. Arched bridges, waterwheels, narrow walkways, and irrigated orchards downstream contrast with the dry ochre plain beyond.

Why does a city canal split into tunnels and waterfalls beneath stone mills?

Diversion works raise and steer part of the Karun River into the Gargar canal, where a controlled height difference sends water through tunnels with enough force to drive mills. The same flow then drops into a basin and continues across the lower plain for orchards and fields, linking urban power and irrigation in one gravity system. Multiple engineered falls, mill chambers, bridge-dams, and green Mianâb land identify Shushtar rather than a natural waterfall.

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