The South-to-North Water Diversion Project (SNWDP), also called the South–North Water Transfer Project, is an ongoing Chinese effort to channel 45 billion m3 of water annually from the Yangtze River in southern China to the country's less fertile northern regions, through three canal systems. The SNWDP, which has up to now cost more than $79 billion, is the largest and longest water diversion project in the world, and benefits the greatest number of people and regions.
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