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上海地处长江口和太湖流域的下游,属平原感潮河网地区,气候温和,而热同季,光温协调,河网稠密,长江口潮水资源丰富,但地势低平,降水时空分配不匀,当地迳流少,又易受高潮、暴雨、台风、洪水等侵袭,存在着洪、潮、涝、渍、旱、盐、污等危害,不仅使我市的农作物产量高而不稳,而且影响工业生产和居民的生活。解放以来,兴修了大量水利工程。1977年以后,按照水利分片综合治理的总体规划,将全市分为14个片,经过十年建设,大
Shanghai is located in the lower reaches of the Changjiang Estuary and the Taihu Lake basin. It belongs to the tidal flat region of the plains and has a mild climate. In the same season, the hot and cold season are coordinated with light and temperature. The river network is dense with abundant tidal water resources. However, It is easy to be hit by climax, rainstorm, typhoon and flood and so on. Flood, tide, waterlogging, stains, drought, salt and so on are harmful to crops. It not only makes the output of our city high and unstable, But also affect the industrial production and the lives of residents. Since liberation, a large number of water conservancy projects have been built. After 1977, in accordance with the overall planning of comprehensive management of water fragmentation, the city is divided into 14 pieces, after a decade of construction, large