解读:春秋战国时期,中原地区普遍用桔槔来灌溉农田。春秋时楚相孙叔敖修的芍陂,战国时期秦国蜀守李冰修的都江堰、水工郑国在秦修的郑国渠,都是著名的水利工程。水利工程的分布主要集中于黄河中下游。都江堰同时具备了防洪、抗旱和排沙的功能,有了它,川西成都平原一带才成为千里沃野,后人称赞说:“水旱从人,不知饥馑,时无荒年,天下谓之天府之国也。”都江堰从建成到现在,一直发挥着防洪灌溉的作用。改革开放后,都江堰 Interpretation: During the Spring and Autumn Period and the Warring States period, the Central Plains region generally used oranges to irrigate farmland. In the Spring and Autumn Period, the Chu Shu Sun Shu Xiu Xiu, the Warring States Period Qin Guoshun Li Bingxiu’s Dujiangyan, the hydraulic Zheng Guoqun in Qin Xiu’s Zheng Guoqu, are well-known water conservancy projects. The distribution of water conservancy projects is mainly concentrated in the middle and lower reaches of the Yellow River. Dujiangyan also has the functions of flood control, drought resistance, and sediment discharge. With it, the area along the Chengdu Plain in western Sichuan has become a thriving wilderness. Later generations praised the saying: “The floods and droughts are from people, and we do not know about hunger, when there is no waste year, and the world is also known as the land of abundance. "Dujiangyan has played a role in flood control irrigation since its establishment. After the reform and opening up, Dujiangyan