南水北调工程的根本目标是改善和修复北方地区的生态环境。由于黄淮海流域的缺水量 80 %分布在黄淮海平原和胶东地区 ,因而优先实施东线和中线工程势在必行。在黄淮海平原和胶东地区的缺水量中 ,又有 6 0 %集中的城市 ,城市人口和工业产值集中 ,缺水所造成的经济社会影响巨大。 The fundamental goal of the South-North Water Diversion Project is to improve and rehabilitate the ecological environment in the north. Since the water deficit in the Huang-Huai-Hai basin is 80% distributed in the Huang-Huai-Hai Plain and the Jiaodong area, it is imperative to give priority to the implementation of the east and midline projects. Among the water deficits in the Huanghuaihai Plain and the Jiaodong area, 60% are concentrated in cities, the urban population and industrial output are concentrated, and the economic and social impact caused by water shortage is huge.