🇮🇷 Iran · Hydraulic works
Qanat-e Zarch – Longest Qanat in Iran
Achaemenid to present (2,500 years continuous) · Persian qanat engineers (Achaemenid, Sassanian, Safavid)
71-km Zarch qanat—longest gravity aquifer tunnel on Earth (500 BCE–Safavid).
🇮🇷 Iran · Hydraulic works
Qanat-e Gonabad South Gallery (Ghasemabad South Branch Qanat)
Achaemenid to present (520 BCE–ongoing) · Achaemenid Gonabad oasis (Khorasan piedmont)
South Gonabad gallery 4.1 km with 62 shafts 42 m mother well: Achaemenid 520 BCE saruj, 12 L/s to Ghasemabad saffron.
🇮🇷 Iran · Hydraulic works
Band-e Kaisar (Valerian Bridge-Dam, Shushtar — Pol-e Kaisar)
Sassanid Early (Shapur I, 241–270 CE) built by Roman captives · Sassanid Persian with Roman engineering corps (Legio)
500-m Roman-Sassanid arch bridge/dam (260 CE) raising Karun for Shushtar's 10-km Gargar canal — easternmost Roman dam.
🇮🇷 Iran · Hydraulic works
Band-e Gar and Dariun Aqueduct Extension (Greater Shushtar)
Sassanian (Shapur I) on Achaemenid · Sassanian Persian with Roman POW labour
Northern Shushtar (65 m, 32°03′N 48°51′E 32.05,48.85) hydraulic extension of UNESCO 1315 Shushtar Historical Hydraulic System (1315): Band-e Gar (Gar Dam) and Dariun Great Weir interconnect canal…
🇮🇷 Iran · Hydraulic works
Band-e Mizan Dam – Shushtar Hydraulic Node
Achaemenid to Sasanian · Achaemenid / Sasanian (with Roman prisoners)
390-m Karun diversion weir (5th c BCE /260 CE) — head of Shushtar mills system.
🇮🇷 Iran · Hydraulic works
Band-e Gargar Secondary Canal (Shushtar Gargar Diversion Canal)
Sasanian (Shapur I post-Edessa 260) · Sasanian with Roman prisoner engineers
Gargar canal: 12-km Sasanian 260 CE cliff canal diverting Karun through Shushtar mills, UNESCO 1315.
🇮🇷 Iran · Hydraulic works
Qanat-e Zarch West Branch (Yazd Zarch Qanat Western Gallery)
Ilkhanid branch on Achaemenid–Sasanian trunk · Ilkhanid Yazd (branch) on Persian qanat tradition
Qanat-e Zarch west: 11.2-km Ilkhanid branch of world's longest 71-km Yazd qanat, UNESCO 1476.
🇮🇷 Iran · Hydraulic works
Shushtar Band-e Ahmadi Weir (Shushtar Ahmadi Bridge-Dam)
Safavid with Sasanian spolia · Safavid Khuzestan
Band-e Ahmadi: 180-m Safavid 1680 bridge-dam 4 km south of Shushtar UNESCO, 12 arches.