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Analysis Latter 50 Years of the Drought-flood Characteristic in Dezhou City
Author(s): 
Pages: 239-241
Year: Issue:  4
Journal: RESEARCH OF SOIL AND WATER CONSERVATION

Keyword:  德州市Z指标旱涝灾害;
Abstract: 对德州市1951~1999a的逐年降水数据、区域旱涝灾害成灾面积及降水与成灾之间的相关性进行了统计分析.依据Z指标划分了7个旱涝等级,给出了旱涝指标与旱涝成灾面积的多年变化趋势以及它们之间的相关系数.结果表明:德州市近50a来,降水变化呈下降趋势;1975a以前偏涝,间或有旱的年份出现,极涝年份为1953、1961、1964a;1975a以后偏旱,间或有涝的年份出现,极旱年份为1981a;旱灾面积越来越大,涝灾面积越来越少,60~70年代为旱涝灾害成灾面积变化的转折点.降水指标为该市今后旱涝预测提供了可能的途径.
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