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我国水资源总量不少,人均不多。水资源占世界第六位,人均占有量约2380立方米。我国水资源有如下五个特点: 一、水量的地区分布很不平衡。水资源的分布与降水分布基本上是一致的。南方多水,北方少水。东部及西南部外流流域面积占全国总面积63.76％,而年径流量占全国36.24％。长江年径流总量达9393.50亿立方米,占全国年径流总量的37.85％。长江流域以北包括黄、淮、海和山东东北各河流域以及内蒙、西北、青、藏等流域广大地区面积占全国2/3,但径流量却只有全国1/6。除此
China’s total amount of water resources, per capita small. Water resources occupy the sixth place in the world, with a per capita share of about 2,380 cubic meters. China’s water resources have the following five characteristics: First, the distribution of water is very uneven. The distribution of water resources and precipitation distribution are basically the same. More water in the south, less water in the north. The outflow basins in the eastern and southwestern regions account for 63.76% of the total national area, while the annual runoff accounts for 36.24% of the national total. The total annual runoff in the Yangtze River reached 939.35 billion cubic meters, accounting for 37.85% of the total annual runoff in the country. The area to the north of the Yellow River, the Huaihe River, the northeastern rivers in Shandong, the vast river valleys in northeastern Shandong, Inner Mongolia, the northwest, the Qinghai and Tibet accounts for two thirds of the national total, while the runoff is only one sixth of the national total. Except this