一、概况上海市地处长江三角洲冲积平原的东缘,太湖流域的尾闾,地势低平,河网密布,是典型的感潮河网地区,总面积6350km~2。共有中小河道3000余条段,全长32800多km,其中可通航的河道210条,计2100km,水面积占土地总面积的11%。河道保障了本市的防汛安全,为工农业生产提供水源,为航运和水产养殖提供条件等,河道在国民经济的发展中发挥了重要作用。 I. Overview Shanghai is located on the eastern edge of the alluvial plain in the Yangtze River Delta. The tail of the Taihu Lake basin is a low tide and a dense river network. It is a typical tidal river network with a total area of ​​6350km ~ 2. A total of more than 3,000 sections of medium and small rivers, with a total length of more than 32,800 km, of which navigable 210 river channels, count 2100km, the water area accounts for 11% of the total land area. The river courses guarantee the flood control safety of the Municipality, provide water sources for industrial and agricultural production, provide conditions for shipping and aquaculture, and the river courses play an important role in the development of the national economy.