The irrigation construction in the Guanzhong Plains dates back as early as period of the West Zhou Dynasty. The Zhengguo Canal, which was built in the late days of the Warring Kingdoms, was a milestone in the history of irrigation construction in the Guanzhong Plains. During the Han and the Tang Dynasty, the irrigation in Guanzhong gained a wholesome development, shaping a network system characteristic of gravityirrigation. After the Song and the Yuan Dynasty, the irrigation in the region assumed a tendency of decline due to effects of natural and human elements, but there were still advantages to be mentioned. In a word, the historical experience and lessons in the irrigation construction in Guanzhong are of great significance of reference to the present.

the Guanzhong region; irrigation construction； the Zhengguo Canal