The Dujiangyan Irrigation System, built by Li Bing and his men is upstream of Chengdu, capitol city of the province of Sichuan in China and controls water from the Minjiang River, diverting water into the irrigation system for the fields. This is one of the oldest irrigation systems ever built.

A painting showing off the general layout of the irrigation system. The dam and dyke system that splits the Minjiang (Black) River is towards the upper-right of the picture.

This is a picture of the "inner" river that flows to the fields and city.

Looking downstream of the "inner" river.

Adding to the flow.

This is the modern dam, built in 1974, that now controls water flow during the rainy and dry seasons.