湖北省降水变化分析

ANALYSIS OF PRECIPITATION VARIATION IN HUBEI PROVINCE

全面分析了湖北省７２个气象台站自建站有观测记录以来的降水资料后，发现全省降水差异较大，分布不均；不同年代之间降水变化亦存在一定的差异。东部和江汉平原６０、７０年代偏少，８０、９０年代偏多；鄂北、三峡河谷和鄂西南５０、７０和９０年代偏少，６０、８０年代偏多；全省平均为７０年代偏少，８０年代偏多。１９８０年以来东部地区降水偏多，降大雨以上的日数增多，西部地区则相反。鄂西南和江汉平原８０年代以后年降水量的变异比以前大，发生强降水导致洪涝或降雨日数增多导致作物渍害的机会将增多。

By analysing precipitation data of 72 meteorological stations all over Hubei Province,it is discovered that precipitation was very discrepant and the distribution was different in Hubei province.The precipitation is different in different years.It was less in the 1960s and 1970s and more in the 1980s and 1990s in the Eastern part of the province and Jianghan plain.It was less in the 1950s,1970s and 1990s,and more in the 1960s and 1980s in the Northern part,the Three Gorge Area and the Southwestern part of the province.It was less in the 1970s and more in the 1980s for all over the province.The precipitation and the heavy raining days have increased in the Eastern part and decreased in the Western Hubei since 1980 variation of precipitation after the 1980s was larger than before in the Southwestern part and Jianghan plain.There would be more floods caused by powerful precipitation.