🇨🇳 China · Hydraulic works
Zhengguo Canal – Jingyang Irrigation Canal (Zheng Guo Qu)
Warring States to Han continuous · Qin with Han engineer Zheng Guo (鄭國)
246 BCE 'sabotage' canal that irrigated 27,000 ha and enabled Qin to unify China.
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🇨🇳 China · Hydraulic works
Warring States to Han continuous · Qin with Han engineer Zheng Guo (鄭國)
246 BCE 'sabotage' canal that irrigated 27,000 ha and enabled Qin to unify China.
🇨🇳 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.
🇨🇳 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.