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倘若三峡工程已经建成，它对1998年长江中下游抗洪将能起什么样的作用？在分析三峡工程防洪的基本条件及调度方案的基础上，按1998年水情作了模拟运行计算。结果表明，如果有了三峡工程，1998年长江中下游洪水位将大幅度降低，防汛情势将有质的变化。
If the Three Gorges Project has been completed, what kind of role it will play in flood control in the middle and lower reaches of the Yangtze River in 1998? Based on the analysis of the basic conditions and schedule of flood control of the Three Gorges Project, the simulation calculation was made according to the 1998 water regime. The results show that with the Three Gorges Project, flood levels in the middle and lower reaches of the Yangtze River will be significantly reduced in 1998, and there will be qualitative changes in the flood control situation.