China Water Transfer Project Documentary. ENGINEERING EPIC.

China Water Transfer Project Documentary. ENGINEERING EPIC.

The central, or middle, route runs from Danjiangkou Reservoir on the Han river, a tributary of the Yangtze River, to Beijing. This project involved raising the height of the Danjiangkou dam by increasing the dam crest elevation from 162 m to 176.6 m above the sea level. This addition to the dam’s height allowed the water level in the reservoir to rise from 157m to 170 m above the sea level. And this, allowed the flow into the water diversion canal to begin “downhill”, pulled by gravity, to the lower elevation of the canals.
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The middle route is built on and across the North China Plain. The canal was constructed so that gravity is the force pushing the flow of the water all the way from the Danjiangkou Reservoir to Beijing, without the need for pumping stations.[12] The greatest engineering challenge of the route was the building of two tunnels under the Yellow River, to carry the canal’s flow. Construction on the central route began in 2004. In 2008, the 307 km-long northern stretch of the central route was completed at a cost of US$2 billion. Water in that stretch of the canal does not come from the Han River but from reservoirs in Hebei Province, south of Beijing. Farmers and industries in Hebei had to cut back on water consumption to allow for water to be transferred to Beijing.