Dujiangyan Irrigation System — Wikipedia 30.99N 103.62E

The Dujiangyan (Chinese: 都江堰; pinyin: Dūjiāngyàn) is an ancient hydraulic engineering system in Dujiangyan City, Sichuan, China. Originally constructed around 256 BC by the State of Qin as an irrigation and flood control project, it is still in use today. The system's infrastructure develops on the Min River (Minjiang), one of the longest tributaries of the Yangtze. The area is in the west part of the Chengdu Plain, between the Sichuan Basin and the Tibetan Plateau. Originally, the Min would rush down from the Min Mountains and slow down abruptly after reaching the Chengdu Plain, filling...