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1 概述 汛期早涝趋势异常是我国短期气候的主要灾害之一,它直接关系到防汛抗旱工作的部署。长江下游沿江地区夏季累积降水量占到汛期总降水量的80％以上,且年际变率较大。夏季降水异常已成为该地区的一种主要气候灾害,它对工农业生产和人民的日常生活产生严重影响。迄今为止,有关长江下游特别是长江三角洲
1 Overview The flood and water level anomaly in flood season is one of the major short-term climatic hazards in China, which is directly related to the deployment of flood control and drought relief. The cumulative precipitation in summer along the lower reaches of the Yangtze River accounts for more than 80% of the total precipitation in the flood season, and the interannual variability is larger. Abnormal summer precipitation has become a major climatic disaster in the region, which has a serious impact on industrial and agricultural production and people’s daily lives. So far, the lower reaches of the Yangtze River, especially the Yangtze River Delta