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🇮🇷 Iran · Hydraulic works
Iron Age to Sassanian (Achaemenid to late antiquity) · Persian (Achaemenid–Sassanian) hydraulicians
Oldest functioning qanat 33 km, 360-m mother well, Achaemenid c.700 BCE, 150 L/s Persian Qanat UNESCO.
🇮🇷 Iran · Hydraulic works
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
Ilkhanid Mongol (1300) to Safavid · Mongol–Persian hydraulic (Rashid al-Din's Jami' al-Tawarikh?), Qom Shi'a
1300 Mongol 26-m arch radius 35 m, oldest surviving arch dam (first Mongol), 294 yr before Tibi Europe.
🇫🇷 France · Hydraulic works
Iron Age (Hallstatt–La Tène) to early Gallo-Roman · Vendée maritime salt artisans (Armorican → Picton maritime)
Atlantic salt-marsh canal network (2.4 km, 2-4 m wide) feeding 180 evaporation pans producing 30 t sea salt/yr (Iron Age).
🇨🇳 China · Hydraulic works
Qin 256 BCE to Han 100 BCE to Qing 1884 (Dujiangyan east feeder) · Qin–Han Shu (Sichuan) state hydraulic
East feeder canal 5.2 km ×12×2.2 m stone revet 1.2 m with bottleneck sluice 8 m: Qin 256 BCE/Han 100 BCE eastern Chengdu 820 ha.
🇨🇳 China · Hydraulic works
Qin (Warring States unification) · Qin Central, Bashu, Baiyue
Xing'an Xiang north 70% vs Lingqu south 30% divide with Huazui spillway and 36 pound locks, 219 BCE Shi Lu Qin.
🇪🇬 Egypt · Hydraulic works
Early Old Kingdom (Djoser–Sneferu) · Old Kingdom Egyptians (Memphite)
World's oldest dam (2650 BCE)—110-m Old Kingdom embankment diverting Wadi Garawi floods.
🇯🇴 Jordan · Hydraulic works
Hellenistic to Byzantine 250 BCE–450 CE · Hellenistic Balqa then Roman Decapolis chora
Walled twin cisterns 22×12×6 m 2,800 m³ with 420-m channel + 18 m dam closing gully — Hellenistic cistern-city 580×320 m.
🇨🇱 Chile · Hydraulic works
Formative to Modern (Alto Ramírez to Colonial) · Tarapacá / Pica-Tarapacá / Hispanic oasis
Pica (1,350 m, 20°29′21″S 69°19′46″W) is the only living oasis of the Atacama with active filtration galleries (socavones) tapping the Pica Aquifer; study by Lictevout et al.
🇱🇰 Sri Lanka · Hydraulic works
Anuradhapura period (400 BCE – 10th c. CE) · Anuradhapura Sinhalese (Sinhala hydraulic civilisation)
400 BCE 350-ha 3.8 Mm³ tank with Bisokotuwa sluice — world's earliest valve 3rd c. BCE.
🇹🇷 Turkey · Hydraulic works
Late Roman to Ottoman (4th–19th c. CE) · East Roman (Byzantine) Constantinople
Valens 971-m double-tier bridge head of 426-km Thracian late Roman water network 373 CE.
🇮🇳 India · Hydraulic works
Classical Sangam to Colonial · Early Chola, British colonial (Cotton)
Chola Karikalan 2nd CE north Kollidam regulators with 12 vents and 1804 Cotton arches, oldest working dam distributary.
🇵🇸 Palestine · Hydraulic works
Iron Age II (Judahite Kingdom, late 8th c. BCE) · Judahite Israelite (Hezekian Jerusalem)
Biblical 533-m S-tunnel 701 BCE two teams meet with 90 cm offset for Assyrian siege.
🇰🇭 Cambodia · Hydraulic works
Angkor (Baphuon style middle Angkor) · Khmer Hindu (Suryavarman I court)
Khmer 7.8×2.1 km reservoir 1050 CE 53 million m³ with West Mebon island temple, hydraulic empire core.
🇨🇳 China · Hydraulic works
Warring States Qin 246 BCE to Han 120 BCE (Zhengguo south) · Qin state Wei–Jing plain with Korean Zheng Guo engineer
South distributary 18 km ×14×2.6 m hangtu levees 3 m with 6 dragon-tail weirs 42 m and fish-scale carp gates 1.2 m: Zheng 246 BCE spy-branch.
🇴🇲 Oman · Hydraulic works
Sasanian to Islamic · Omani, Sasanian Persian, Ibadi
Nizwa Daudi mother well 30 m with 8-km tunnel and shari'a sharing basin, UNESCO aflaj highland branch.
🇾🇪 Yemen · Hydraulic works
South Arabian (Sabaean to Himyaritic) · Sabaean Saba and Himyarite
Marib north secondary 750-m earthen with Almaqah sluice temple 50 musnad inscriptions, Sabaean 750 BCE spillway.
🇨🇳 China · Hydraulic works
Han to Qing (2nd c. BCE – 19th c. CE) · Han Chinese, Turkic Uyghur, Gaochang Tokharian, Hui
Tianshan 5,000-km 1784-karez gravity snow-melt system below sea level Han–present.
🇪🇸 Spain · Hydraulic works
Roman Augustan (late Republic to early Principate) · Roman Tarraconensis (Tarraco Colonia)
217-m Augustan double-tier arcade (20 BCE–20 CE) 27 m high — Tarraco's Francolí aqueduct masterpiece.
🇮🇪 Ireland · Archaeological wonder
Iron Age (La Tène B / Gaelic Ireland) · Gaelic Iron Age Ireland
Eastern continuation (48 m asl, 53°37′N 07°50′W 53.62,-7.84 Cloonbreany 2 Cartron Rd N39 XT18) of the Iron Age Corlea Trackway (148 BC precise dendro of 18-m preserved hall, 148 BC autumn fell) bog…
🇾🇪 Yemen · Hydraulic works
Sabaean to Himyarite (8th c BCE–6th c CE) · Sabaean / Himyarite
North sluice of Great Dam of Ma'rib (750 BCE–575 CE) — 23-m cut-stone control feeding northern oasis.
🇸🇦 Saudi Arabia · Hydraulic works
Early Islamic Umayyad (740 CE) NW Arabia · Umayyad Khaybar–AlUla Harrat oasis (NW Arabia)
Southeast expansion gravity dam 158 m × 14.2 m basalt 800 m: clay-core 2.1 m + 3-tier buttress trapping 42,000 m³.
🇨🇳 China · Hydraulic works
Warring States, Qin to Qing continuous · Qin state engineers under Li Bing (later successive dynasties maintenance)
256 BCE Qin weir still irrigating 5,300 km²—world's oldest dam-less hydraulic system.
🇯🇴 Jordan · Hydraulic works
Chalcolithic to Early Bronze IA (Levantine proto-urban) · Levantine Early Bronze proto-urban pastoralists
3000 BCE basalt proto-city with 5 dams and canals—the second-oldest hydraulic network.
