Lingqu Canal – Magic Canal (Xing'an, Guangxi)
灵渠 · Ling Canal · Magic Transport Canal · Qin Lingqu
Qin to Tang to Qing continuous use·Qin imperial engineers under Shi Lu·🇨🇳 Guangxi Zhuang Autonomous Region, China
About
About Lingqu Canal – Magic Canal (Xing'an, Guangxi)
World's oldest contour canal—36 km waterway dug 214 BCE on First Emperor Qin Shi Huang's order to link Yangtze (Xiang River) and Pearl (Li River) watersheds for southern conquest of Nanyue. Engineer Shi Lu exploited unique watershed saddle at Xing'an: 60-m stone 'Spade Mouth' (Huazui) splits Xiang flow 30/70 between north (Yangtze) and south (Pearl), with 20 stepped spillways (30% grade overdams), 18 pound-lock-like plough locks (dou) and bamboo haul channels still visible. Lingqu transported Qin armies, then fed Lingnan rice and global porcelain export toward Guangzhou; pounded earth + stone lock gates predate European canal locks by 1,400 years.
Why it mattersFirst watershed-linking canal globally; precursor to Grand Canal; earliest pound-lock technology proving Chinese hydraulic primacy before European flash-lock.
Open questions
Mysteries & theories
Mysteries
- 01Whether Lingqu's plough locks truly prefigure pound locks vs flash-lock hybrid
- 02Quantifying historic silt split efficacy 30/70 vs modern
Theories
- 01Lingqu as military infrastructure theatre enabling Qin China's longest supply line
- 02Canal as cultural fusion corridor binding Lingnan Yue to Huaxia core
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c.214 BCE (Qin Dynasty)
- Period
- Qin to Tang to Qing continuous use
- Culture
- Qin imperial engineers under Shi Lu
- Builders
- Engineer Shi Lu under Qin Shi Huang (史禄)
- Purpose
- Logistics canal for Qin southern armies and later Pearl–Yangtze grain/porcelain trade
- Rediscovered
- 214 BCE Shiji record; continuously in use; 2014 UNESCO tentative 5814 China Grand Canal nomination
- Excavation
- Excavation ongoing
214 BCE
Shi Lu cuts canal across Xiang-Li watershed saddle for Nanyue campaign
140 BCE
Han expansion re-dredges canal and adds 18 plough locks
825 CE
Tang poet Yu Wuxi records lock operations
2014
China Grand Canal Extension Tentative List including Lingqu
On the ground
Structures & features
25.5990° N · 110.5220° E · 210 m · 3 mapped features
Spade Mouth (Huazui) Splitter
hydraulic splitter60-m stone spade splitting Xiang River flow 30/70
25.5990° N · 110.5220° ENorth Canal—Xiang Section
canal2-km contour channel with 18 pound-lock flights
25.6100° N · 110.5100° ESouth Canal—Li Section
canalPearl-bound channel dropping 30 m via overdam steps
25.5800° N · 110.5400° E
Gallery