There are diversion dikes and dams upstream of the pile, which divide the Minjiang River into Neijiang River and Waijiang River, and a sluice is built to regulate the flow of the two rivers. Since then, the Minjiang River has been dispersed, which not only avoids floods, but also facilitates shipping and irrigation, and has become a comprehensive water conservancy project with multiple benefits of flood control, irrigation and shipping.

Dujiangyan Water Conservancy Project has ensured the irrigation of about 3 million mu of fertile land, making Chengdu Plain a "land of abundance" for drought and flood. Dujiangyan Water Conservancy Project still irrigates Chengdu Plain, which is a preserved water conservancy project still in service in the world. Can serve today, all because of the most critical six words-deep scouring beach, low weir.

Extended data

cultural context

Dujiangyan irrigation area is the most economically developed area in Sichuan Province, and it is also the political, economic and cultural center of Sichuan. "Rich products, outstanding people and outstanding land", has the reputation of "land of abundance" in history. The natural landscape, human landscape, urban brilliance and urban scenery of the irrigation area are colorful and beautiful. Irrigation district water conservancy, dotted with charm and characteristics,

What is pleasing to the eye is, "People's Canal, Dongfeng Canal, Sanheyan, Tongji Weir and Qingshui; Black Dragon Beach, Sancha Lake, luban reservoir, the lake is sparkling; Longquan is penetrated, the sky is open, and the water is flowing. " The whole irrigation area presents a "long dragon walking on the ground and the milky way flowing in the sky;" The rainbow rises from the deep valley, and the high gorge rises from Pinghu.

Baidu encyclopedia-Dujiangyan water conservancy project

Baidu encyclopedia-deep scouring beach, low weir