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(一)长江概况长江是我国第一条大河,也是世界大河之一。全长5,800公里,仅次于密西西比河、尼罗河而居世界第三位。流域面积达180万平方公里,约为全国总面积五分之一。居民2.5亿,占全国总人口的38.3％。它的年水量平均约有9,260亿公方,为黄河的20倍,比苏联最大的叶尼塞河和勒拿河的水量多1倍,比伏尔加河的水量多3倍,次于亚马逊河、刚果河、恒河而居世界第四位。水
(A) Overview of the Yangtze River The Yangtze River is China’s first big river, but also one of the great rivers in the world. A total length of 5,800 kilometers, second only to the Mississippi River, the Nile and third in the world. Watershed area of 1.8 million square kilometers, about one-fifth of the total area of the country. 250 million inhabitants, accounting for 38.3% of the total population. Its average annual water volume is about 926 billion square kilometers, 20 times that of the Yellow River, 1 times more than that of the largest Yenisei and Lena rivers in the Soviet Union, more than 3 times that of the Volga River, second only to the Amazon, the Congo River, Ganges and the world’s fourth place. water