 |  |  |
The magical three projects ofDujiangyan
| | |
The headwork of the Dujiangyan Irrigation System consists mainly ofthree projects:
| Yuzui, which is a fish-moath-like water-dividing dyke.(Left picture) |
Feishayan, which is a spillway for discharging flood andsilt.(middle picture) |
Baopingkou, which is a channel cut through Mount Yulei as a water inlet.(rightpicture) |
Yuzui Water-dividing Dyke can divert the water of theMinjiang River scientifically and rationally, 40 percent of which flows into theinner river in flood season and 60 percent flows into the outer river, and vice versa in dryseason. Besides 80 percent of the silt is carried away by the outer river.Baopingkou is shaped like a inverted ladder to control the water andevacuate cxcessive water.Feisbayan Spillway discharges flood and silt from the inner river to the outer river.Working in harmony with one another, the threeprojects have composed a complete and scientific irrigation and drainage network, which works automatically to a remarkabledegree,thus guaranteeing the water for irrigation in the irrigated areas.