摘要
利用宜良县1960~2010年的年降水量和小型蒸发量资料,采用线性趋势、干燥度等统计学方法,分析近51年宜良县降雨量和蒸发量的变化特征。结果表明,1960~2010年宜良县降雨量和蒸发量均在逐年减小,特别是21世纪以来降雨量和蒸发量均减少,可利用水资源较少。宜良县降雨主要集中在5~10月,蒸发主要集中在3~9月,其中3~5月降雨量较少,而蒸发对水的消耗比较明显,气候比较干燥,容易发生春旱;10~11月蒸发对水的消耗比较小,而这个阶段降水也比较少,也容易发生秋旱。
According to the data of precipitation and evaporation in Yiliang County during 1960- 2010,using linear trend and dryness degree method,the variation characteristics of rainfall and evaporation in Yiliang County in recent 51 years were analyzed. The results showed that the precipitation and evaporation was decreased year by year,especially since twenty-first century,the amount of rainfall and evaporation were reduced,the avaiable water resources were less. Rainfall mainly concentrated during May- Oct.,evaporation mainly concentrated during Mar.- Sep.,among which,rainfall during Mar.- May was less,and evaporation of water consumption was obvious,the climate was relatively dry and was prone to appear spring drought; evaporation of water consumption was relatively small during Oct.- Nov.,and the precipitation was less and was also prone to appear drought in autumn.
出处
《安徽农业科学》
CAS
2016年第9期229-230,261,共3页
Journal of Anhui Agricultural Sciences
关键词
降雨量
蒸发量
变化特征
线性趋势
干燥度
Rainfall
Evaporation
Variation characteristics
Linear trend
Dryness
