摘要
依据1962-2015年的气象观测数据,采用线性分析、突变检验、标准化降水指数(SPI)等方法,探讨了聊城地区降水量的时空变化和旱涝灾害特征。结果表明:聊城地区年平均降水呈现不明显下降趋势,季节降水中,春季降水呈现增加趋势,其余各季呈现不明显的下降趋势。聊城市旱涝交替发生,变化具有阶段性特征,1962-1970年、1981-1990年、2011-2015年以干旱为主,1971-1981年、2001-2010年以雨涝为主,经历了旱-涝-旱涝-旱的变化过程。3个区域旱涝变化与全区总体上较为一致。
Based on the meteorological observation data from 1962 to 2015,using linear analysis,mutation test,the standardized precipitation index(SPI)and other methods,the precipitation and drought and flood disasters in Liaocheng region from the change of time and space were discussed.The results showed that the average annual rainfall in Liaocheng region presented the downward trend but not obviously,spring precipitation showed a trend of increase,the rest of the season presented the not obviously downward trend.In Liaocheng,drought and flood occurred alternately,the change had periodic characteristic,1962-1970,1981-1990,2011-2015 was droughtdominated,1971-1981,2001-2010 was waterlogging dominated,drought and flood occurred alternately.The drought and flood change of three study areas were relatively consistent with the whole area.
出处
《黑龙江农业科学》
2017年第8期21-25,共5页
Heilongjiang Agricultural Sciences
基金
山东省气象局青年基金资助项目(2016SDQN19)
聊城市气象局资助项目(2016lcqx05)
关键词
SPI
旱涝灾害
时空变化
聊城地区
SPI
drought and flood disasters
the change of time and space
Liaocheng region
