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🇨🇳 China · Hydraulic works
Spring & Autumn to Sui to Qing continuous operation · Wu State, Sui, Yuan engineers plus successive dynasties
1,797 km artificial river (5th c. BCE–609 CE)—world's longest canal, feeding capitals for 1,400 years.
🇨🇳 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.
🇨🇳 China · Hydraulic works
Qin to Tang to Qing continuous use · Qin imperial engineers under Shi Lu
214 BCE Qin contour canal—36 km linking Yangtze to Pearl via watershed split and 1,400-year-earlier pound locks.
🇨🇳 China · Hydraulic works
Qin 214 BCE to Tang 825 CE (Lingqu North pound) · Qin imperial (Shi Huang–Shi Lu) Lingqu Yue conquest hydraulic
North pound extension 1.2 km ×8×1.5 m with 3 Qin granite pound-locks 8×4 m ×1.0 m lift — earliest locks globally 214 BCE.
