摘要
以南流江流域15个主要代表站点为例,基于1978～2007年的年降水资料,采用回归分析法、滑动t检验法、Cramer法、Yamamot法、Mann-Kendall法和Pettitt法进行了演变趋势分析和突变点检测,并运用小波分析揭示其降水序列的多时间尺度振荡特性和周期性变化。结果表明,南流江流域年降水量变化趋势不明显,1996年发生突变,演变过程存在三类明显的时间尺度特征,降水量由多变少。
Base on annual precipitation data of fifteen major stations in Nanliujiang Basin from 1978 to 2007, regression analysis, moving t-test technique, Cramer method, Yamamot method, Mann-Kendall method and Pettitt method are applied to analyze the evolution tendency and sudden change points. And then the multi-scale cycle and jump variation of annual precipitation time series is discussed with wavelet analysis. The results show that the variation trend of rainfall is not obvious; the sudden change point occurred in 1996; the evolution of rainfall series presents three kinds of distinct time-scales and the annual precipitation is decreasing.
出处
《水电能源科学》
北大核心
2012年第4期6-8,共3页
Water Resources and Power
基金
广西自然科学基金资助项目(2010GXNSFE013005)
广西科技开发基金资助项目(桂科攻0895004-3-1)
关键词
降水序列
非参数检验
小波分析
南流江流域
series of precipitation
nonparametric test
wavelet analysis
Nanliujiang Basin
