Quick Answer: What Is the Lingqu Canal?
The Lingqu Canal (灵渠, Língqú) is an ancient canal system at Xing’an in Guangxi. Completed in 214 BCE under the Qin, it connected the Xiang River system, which drains toward the Yangtze, and the Li River system, which drains toward the Pearl River.[1][2]
- Purpose: The Qin built the canal to carry grain and other supplies south.[1]
- Water control: Weirs at the canal head raise the water level and help distribute flow.[1][3]
- Watershed crossing: The South Canal reaches the Li drainage, and the North Canal joins the Xiang downstream.[1][3]
The full system combines excavated channels, adapted natural waterways and hydraulic structures.[1][3]
Near Xing’an, two rivers pass close to one another at their upper reaches, then drain toward different parts of China. The Qin waterway used that proximity to connect the basins. To understand the route, begin with the Xiang headworks and follow each branch separately.[1][3][4]
Where the Lingqu Canal Crosses the Watershed
The Xiang is in the Yangtze basin and the Li is in the Pearl River basin. At Xing’an, the North Canal carries water back to the Xiang downstream. The South Canal crosses the divide, feeds into a tributary of the Li and makes the connection between the two basins.[1][3]
The headline length, 36.4 km, includes both branches. Only part of the South Canal was newly cut. The irrigation commission describes about 4.1 km of artificial channel there, with roughly 29 km using a modified natural watercourse. That distinction shows how builders concentrated excavation where the divide interrupted the route.[1][3]
How the Canal Head Split the Flow
At the canal head, a pointed structure often called the Plow Beak sits at the division of the flow. Weirs raise the water level so water can enter the canal branches. During higher flow, water can pass over the weirs and return to the old Xiang channel downstream. These functions matter together because a supply for the branches has to coexist with a route for excess water.[1][3][4]
Curves helped ease the gradient on parts of the route. The canal also had gates that regulated water and helped boats pass. The irrigation commission compares their function with ship locks. The comparison helps explain the movement of boats without assuming that each early gate matched a modern lock chamber.[1][3]
How the Waterway Changed After the Qin
The canal’s completion belongs to the expansion of the Qin dynasty into Lingnan. Its later importance extended to movement of people and goods, as well as agricultural irrigation. The waterways and their structures continued to be maintained and adapted after the Qin.[1][2][3]
Modern railways took over much of the long-distance transport function. The canal remains part of a working water landscape, with irrigation and other water-management uses. For another Qin-era project shaped by a different task, the Zhengguo Canal brought irrigation to the Guanzhong plain.[1][2][4]
FAQs About the Lingqu Canal
How long is the Lingqu Canal?
The UNESCO Tentative List entry gives 36.4 km for the system. The irrigation commission breaks that down into 3.25 km for the North Canal and 33.15 km for the South Canal.[1][3]
Is the Lingqu Canal a UNESCO World Heritage Site?
Lingqu appears on China’s UNESCO World Heritage Tentative List. It also has a separate World Heritage Irrigation Structure recognition through the International Commission on Irrigation and Drainage.[1][2]
Is the Lingqu Canal part of the Grand Canal?
Lingqu is the Guangxi waterway that joins the Xiang and Li river systems. The Grand Canal is a separate system with a different route across eastern China.[1][5]
Sumber
[1] UNESCO World Heritage Centre. Lingqu Canal, Tentative List
[2] International Commission on Irrigation and Drainage. Lingqu Canal
[3] International Commission on Irrigation and Drainage. World Heritage Irrigation Structures Compendium
[4] Geographical Sciences. A Short Note on the Lingqu Canal Linking Central and South China
[5] UNESCO World Heritage Centre. The Grand Canal