🇮🇷 Iran · Hydraulic works
Qanat of Zarch, Yazd
Achaemenid to present ~700 BCE–present · Persian (Median/Achaemenid onward)
71 km 2,115-shaft Zarch qanat - world's longest - still feeding Yazd after 3,000 years.
🇹🇿 Tanzania · Earthwork
Engaruka
Iron Age Iraqw / Sonjo (15th–19th c intensive agricultural) · Iraqw / Sonjo (Datoga/Maasai pressure oral)
3,000 ha irrigated stone terrace and furrow system with 500+ compounds and 5 km canals on Rift escarpment – irrigation without state.
🇮🇳 India · Hydraulic works
Kallanai Grand Anicut East Channel
Early Historic to Medieval · Early Chola, Medieval Chola, Vijayanagara
800-m-east Kallanai east channel with 9-sluice Chola regulator feeding east delta.
🇮🇳 India · Hydraulic works
Kallanai South Sluice — Grand Anicut Vennar Distributary Head
Chola Early historic to Medieval (100 – 1030 CE) · Tamil Chola hydraulic statecraft
South Vennar regulator of 2nd-c Chola anicut with Rajendra I inscriptions 1012 CE.