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三峡工程规模巨大,举世瞩目,它不仅具有显著的经济效益,还具有显著的环境效益和社会效益。三峡工程是解决长江中、下游严重洪水威胁的一项不可替代的关键性工程。长江上游洪水来量大、与中下游河道特别是荆江河道过洪能力小的矛盾,十分突出,两岸地面高程又普遍低于洪水位,一旦发生特大洪水,堤防漫溃,将直接威胁江汉平原和洞庭湖区1500万人口、2300万亩农田和一批重要
The Three Gorges Project is huge in scale and attracts worldwide attention. It not only has significant economic benefits but also has significant environmental and social benefits. The Three Gorges Project is an irreplaceable key project to solve the serious flood threat in the middle and lower reaches of the Yangtze River. The flood volume in the upper reaches of the Yangtze River is large, and the contradiction with the flood capacity in the middle and lower reaches of the river, especially the Jingjiang River, is very prominent. The elevation of the two sides of the Taiwan Strait is generally lower than the flood level. In case of floods and dike collapse, it directly threatens the Jianghan Plain and Dongting Lake District 15 million population, 23 million mu of farmland and a number of important