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长江上游是我国暴雨较多的地区之一,暴雨在地区上的不同分布和移动,将直接影响各支流的洪水及宜昌站洪水的组合遭遇。分析宜昌站的洪水成因,对于确定三峡水库的设计洪水有决定的意义。宜昌站具有百年(1877年～现在)的水文资料,此次分析工作从宜昌洪水入手,分析其各次洪水的暴雨过程、环流形势及主要天气系统,对大洪水和一般洪水进行对比分析,找出它们的规律性,进一步推论形成三峡可能最大洪水的气象特征,为估算三峡可能最
The upper reaches of the Yangtze River is one of the areas with heavy rainfall in our country. The different distribution and movement of rainstorms in the area will directly affect the flood of various tributaries and the flood of Yichang Station. Analysis of the causes of flooding in Yichang Station is of decisive significance in determining the design flood of the Three Gorges Reservoir. Yichang station has a hundred years (1877 ~ now) hydrological data, the analysis of floods from Yichang to start, analyze the heavy rain of its various floods, the circulation situation and the main weather system, comparative analysis of major floods and general floods to find Out of their regularity, to further infer the possible formation of the Three Gorges may flood the meteorological characteristics, in order to estimate the Three Gorges may be the most