摘要
通过对50a来榆林市主要代表站河川基流量进行线性倾向估计、Mann-Kendall非参数检验和Hurst指数分析发现,线性倾向率均为负值,Mann-Kendall非参数检验的统计量U均为负值,Hurst指数具有正持续性。三种结果都表明过去50a来榆林市主要代表站河川基流量呈总体下降态势,并在未来有继续下降的趋势。
The river base flow data of Yulin city＇s main stations in the last 50 years were analyzed with the methods of linear trend,Mann-Kendall non-parametric test and Hurst index.We found that the rate of linear trends are negative,Mann-Kendall non-parametric test statistic U are is negative,Hurst index has a positive sustainability.The results show that Yulin city＇s river base flows have a declining trend,and in the future it will continues a downward trend.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2011年第2期98-101,共4页
Journal of Arid Land Resources and Environment
基金
陕西省"13115"科技创新工程重大科技专项项目(2008ZDKG-75)
西北大学研究生创新基金(08YZZ27)资助
