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1 枢纽开发主要任务 枢纽开发首要任务是解决长江中下游、特别是荆江河段的防洪。三峡工程建成后,三峡水库防洪库容221.5亿m~3。将大大改善整个长江中下游平原地区的防洪条件,特别是直接保护荆江河段两岸1500万人的生命财产的安全,堤防的防洪标准可以由原十年一遇提高到百年一遇。其次是向华东、华中、华南地区供电,水电站装机总容量18200MW,年平均发电量847亿kW·h,每年可替代原煤5000万t。第三,工程建成后将大大改善宜昌至重庆600km航道,万吨级船队可直达重庆。航道单向通过能力可从现状条件的1000万t提高至5000万t,运输
A key task of hub development The first task of hub development is to solve flood control in the middle and lower reaches of the Yangtze River, especially the Jingjiang reach. After the completion of the Three Gorges Project, the flood control reservoir capacity of the Three Gorges Reservoir is 22.25 billion m 3. Will greatly improve the flood control conditions throughout the middle and lower reaches of the Yangtze River. In particular, it will directly protect the lives and property of 15 million people on both sides of the Jingjiang River. Flood control standards for dike can be raised from once a decade to once in a century. The second is to supply electricity to East China, Central China and South China. The total installed capacity of hydropower stations is 18200MW, with an average annual generating capacity of 84.7 billion kW · h, replacing 50 million tons of raw coal each year. Thirdly, after the project is completed, it will greatly improve Yichang to Chongqing 600km waterway and the 10,000-tonnage fleet will reach Chongqing directly. One-way channel through capacity from the current conditions of 10 million t increased to 50 million t, transport