1
Grand Canal of China
- Length (km)
- 1794

This ranking features the top 10 ancient man-made canals characterized by massive engineering scales, immense labor force mobilization, complex geological modifications, and profound historical influence. Ranking criteria are based on total length, volume of earthwork, and historical significance.
Ranking methodology has not been provided.
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The construction of ancient canals was often the ultimate expression of state power.
| Rank | Name | Length (km) | Era |
|---|---|---|---|
| 1 | Grand Canal of China |
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| - |
| 2 | Canal of the Pharaohs | 160 | - |
| 3 | Nahrawan Canal | 120 | - |
| 4 | Lingqu Canal | 34 | - |
| 5 | Zaghouan Aqueduct | 60 | - |
| 6 | Canal du Midi | 240 | - |
| 7 | Babylonian Canal System | 90 | - |
| 8 | Karez System (Turpan) | 5000 | - |
| 9 | Diolkos | 6 | - |
| 10 | Foss Dyke | 70 | - |
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