重庆地处祖国西南的四川盆地东部,幅员面积2.3万平方公里,人口 1500余万。境内地形复杂,相对高差1819米。全市现有耕地 1100余万亩,除部分在平坝外,大部分分布在丘陵山区。全年降雨量在1100毫米左右,但降雨时空分布不均,一年四季均有干旱,尤以4—5月的夏旱和7—8月的伏旱为重。 建国以来,我市虽兴建了大量的水利工程设施,有效灌溉面积达509万亩。但由于这些工程设施大都建于五、六十年代,工程年久 Located in the eastern part of Sichuan Basin, southwest of the motherland, Chongqing covers an area of ​​23,000 square kilometers with a population of 15 million. Terrain complex territory, the relative elevation 1819 meters. The city’s existing 1,100 acres of arable land, with the exception of some in Pingba, most of the distribution in the hilly mountains. Annual rainfall of about 1100 mm, but uneven temporal and spatial distribution of rainfall, drought all year round, especially in the summer drought in April-May and July-August drought as the most important. Since the founding of New China, although the city has constructed a large number of water conservancy projects and facilities, the effective irrigation area amounts to 509 mu. However, most of these engineering facilities were built in the 1950s and 1960s and the project has been going on for a long time