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中文摘要: 利用湖南52个代表站1958～1998年4～9月的降水资料，确定了洪涝年，分析了近40年湖南洪涝的特征和演变趋势。在此基础上，探讨了近期洪涝灾害日益严重的原因。它们是：气候背景因素，大气环流异常，厄尔尼诺的影响，洞庭湖的水文特性和面积锐减，社会因素。
中文关键词: 湖南，洪涝灾害，演变，成因
Abstract:Based on precipitation data of 52 meteorological stations in Hunan province from April to September during 1958～1998,the flooding years are determined,the features and evolution trends of flooding in the last 40 years are analysed.The causes of increasingly serious of the damage in recent years are studied on the basis of above discussion.The climatic background, the unusual atmosphere general circulation,the influence of El Nino,the specific property of hydrology and area rapid reduction of Dongting Lake and elements of society are the influential factors.
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引用文本：
段德寅,汪扩军,陆魁东,1999.近40年湖南洪涝灾害的演变趋势及其成因[J].气象,25(6):42-46.
,1999.Evolution Trends of Flood Waterlogging Damage and Its Contributing Factors of Hunan Province in the Last 40 Years[J].Meteor Mon,25(6):42-46.
段德寅,汪扩军,陆魁东,1999.近40年湖南洪涝灾害的演变趋势及其成因[J].气象,25(6):42-46.
,1999.Evolution Trends of Flood Waterlogging Damage and Its Contributing Factors of Hunan Province in the Last 40 Years[J].Meteor Mon,25(6):42-46.