【摘要】 详细分析了三峡库区历年入汛日期早晚的气候特征，并与长江中下游地区的入梅日期作了比较，发现两者基本同步；另外，对库区各级、各类暴雨的多少及时空分布作了大量统计，结果表明，就区域平均而言，库区东部的暴雨日数多于西部更多还原

【Abstract】 The climatic features of the beginning time of flood seasons in the Sanxia reservoir region from 1961 to 1994 is analyzed in detail.The dates of the beginning time of flood seasons in the reservoir region are compared with those in the middle and lower reach of the Yangtze River.It is found that they are almost synchronous on the whole.In addition,the times and the spatial temporal distribution of all kinds and levels of heavy rain in the reservoir region are investigated.The results show that the number of days of heavy rain in the eastern part of the region is more than those in the western part on average.更多还原