摘要
本文应用1966-2005年长春地区各代表站的降水量和蒸发量资料,计算了各站各年、各月的干旱指数r。分析表明:长春地区干旱发生频繁,个别年较严重。干旱空间分布不均匀,具有明显的季节性和持续性特点,年际变化的震荡周期逐渐缩短。
this paper introduces the calculation of the drought index of the various stations at monthly and annually based on the precipitation and evaporation data of each delegating station between 1966- 2005. The analysis result indicates that the drought will occur frequently and individual year will be more serious in Changchun region, because Uneven distribution of drought which has obvious characteristics of seasonal and sustainable, vibrating period gradually shorten of inter-annual change.
出处
《吉林水利》
2008年第6期19-22,共4页
Jilin Water Resources
关键词
干旱指数
干旱分区
干旱规律
drought index
drought subarea
drought law
