Dujiangyan Irrigation System

2,200 years old and still working — the engineering project that made Chengdu possible

Overview

In 256 BC, a Qin-dynasty governor named Li Bing faced a problem: the Minjiang River flooded catastrophically every spring, then dried to a trickle in summer — making the Sichuan Plain simultaneously flood-prone and drought-prone. His solution was an irrigation system so elegantly designed that it's still functioning 2,200 years later, feeding water to 5,300 km² of farmland and 7 million people. No dams, no pumps — just gravity, stone, and an understanding of fluid dynamics that wouldn't be formally described in the West for another two millennia.

The Three Masterpieces of Engineering

• Fish Mouth Divider (鱼嘴): A teardrop-shaped rock island that splits the Minjiang River into two channels — 40% for irrigation, 60% for flood control. The split ratio adjusts automatically based on water volume.
• Flying Sand Spillway (飞沙堰): A low overflow weir that redirects excess water and 80% of river sediment back to the outer channel. When water flows over it, you can see the physics in action — debris spins off to the side.
• Bottleneck Channel (宝瓶口): A narrow gap carved through a mountain ridge that controls how much water enters the inner irrigation channel. Too much = flood. Too little = drought. Li Bing got it right.

What to See on Site

• Anlan Suspension Bridge (安澜桥): The "Bridge of Calm Waves" — an ancient bamboo-and-pile bridge spanning the Minjiang. It sways dramatically, which is half the fun and half the terror.
• Erwang Temple (二王庙): Temple dedicated to Li Bing and his son Li Erlang. Carved into the hillside above the Fish Mouth, it's a scenic viewpoint and cultural monument.
• Lidui Park (离堆公园): The park entrance on the "Bottleneck Channel" side. Panoramic view of the entire irrigation system from the top floor of the Guanlan Pavilion.
• Drumbeating Water Release Ceremony: Performance at scheduled times demonstrating the ancient water-release ritual. Check schedule on arrival.

Practical Information

• Hours: 8:00 AM - 6:00 PM (summer), 8:00 AM - 5:30 PM (winter)
• Tickets: ¥80
• Getting There: High-speed rail from Chengdu (Chengdu Railway Station or Xipu Station) to Dujiangyan Station — 30 minutes, ¥10. Then taxi (¥15) or bus #4 to the park entrance.
• Duration: 3-4 hours for a thorough visit.

Local Pro-Tips

• Morning for fewer crowds. Afternoon groups arrive from Chengdu tour buses.
• The Anlan Bridge is a must. It connects the Fish Mouth to Erwang Temple — the most memorable crossing of any irrigation system.
• Combine with Mount Qingcheng. They're 15km apart. Dujiangyan in the morning, Mount Qingcheng in the afternoon = perfect full day.
• Wear good walking shoes. The park involves hill paths and stairs. Not a flat walk.

Nearby Attractions

• Sanxingdui Museum — 3,000-year-old Bronze Age mystery
• Mount Emei — Sacred Buddhist mountain, golden summit sunrise
• Panda Base — Combine for a two-day Sichuan trip