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一、国土开发现状七大江河的工农业总产值占全国90%以上,其中长江流域和黄淮海三个流域各占全国工农业总产值三分之一。如果以单位面积工农业产值为国土开发程度的概括性指标来衡量,则淮河海河辽河为最高,其值为全国平均数的四至五倍。这三条河以十二分之一的国土面积提供全国四分之一以上的工农业产值。而长江
I. Present Situation of Land Development The gross output value of industry and agriculture of the seven major rivers accounts for over 90% of the country’s total. Among them, the three catchments in the Yangtze River Basin and the Huang-Huai-Hai River each account for one-third of the country’s total industrial and agricultural output value. If the unit area of industrial and agricultural output value as a measure of the degree of development of land to measure the general, the Huaihe River Liaohe highest, the value of the national average of four to five times. The three rivers provide more than a quarter of the country’s industrial and agricultural output with one-twelfth of the land area. The Yangtze River