China's Dujiangyan irrigation system dates to at least the fourth century B.C. It has been proclaimed a model system since that time, but it is a model that has never been copied in humid China. It is speculated that this is because the system had its origins in Central Asian Xinjiang province and is most useful in similar, arid, environments.

A new look at China's Dujiangyan irrigation scheme and its possible central Asian origins

On decrit les ouvrages d'irrigation crees il y a 2200 ans a Dujiangyan en Chine par Li Bing et le developpement actuel grâce a des systemes de commandes centralisees

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Li Bing's masterpiece stands test of time