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一、长江流域的基本特征,是具有超流域意义的长江流域的面积占全国的1/5,人口占全国的38.3%,水量占全国1,600条主要河流水量总和的40%,约为黄河的20倍,在世界大河中居第四位,仅次于亚马逊河、刚果河和恒河。长江流域是我国主要的农产区,流域内耕地总面积约占全国的25.4%,而粮食产量则占全国的40%,其中大米产量占全国的58%,由于气候和土壤条件优越,因此农业发展是具有极大潜力和广阔的前途。流域内蕴藏着丰富的矿产资源和动力资源。水力蕴藏量占全国40%,有色金属占全国的60—80%以上,几乎集中了全国的磷矿资源和天然气;铁和锰的储量亦相当巨大,根据动力资源和矿产资源在地理分布上的自然结合,为建立钢铁基地;发展有
First, the basic characteristics of the Yangtze River Basin is that the Yangtze River Basin, which has the significance of ultra-river basin, occupies 1/5 of the country’s population and accounts for 38.3% of the national total. The water volume accounts for 40% of the total water volume of 1,600 major rivers nationwide, about 20% Times, ranking fourth in the world’s major rivers, second only to the Amazon, the Congo and the Ganges. The Yangtze River Basin is a major agricultural area in China. The total cultivated area in the drainage basin accounts for 25.4% of the national total, while the grain output accounts for 40% of the national total. The output of rice accounts for 58% of the national total. Due to the superior climate and soil conditions, agriculture Development has great potential and broad prospects. The basin contains a wealth of mineral resources and power resources. Hydropower reserves account for 40% of the national total. Non-ferrous metals account for more than 60-80% of the national total, almost concentrating the phosphate rock resources and natural gas in the country. The reserves of iron and manganese are also quite huge. According to the geographical distribution of power resources and mineral resources Natural combination, to build a steel base; development there