陕南汉江安康站径流量年际变化规律的研究
Study of interannually variance of Hanjiang river in Ankang
-
摘要: 用功率谱和周期图两种谱分析的统计方法 ,研究了陕南汉江安康站 1 943年~ 1 997年共 55年最大径流最及最小径流量年际变化规律 ,得到了中国西部汉江安康站最大径流量具有 4~ 6年 ,8~ 1 0年 ,2 5~ 2 7年的准周期振荡 ,最小径流量具有 7~ 9年 ,1 7~ 1 8年的准周期振荡的结论 ,从而为我国水文部门探寻汉江上游径流量年际变化规律提供了科学依据Abstract: Spectral analysis is used to study interannually variance of the runoff of Hanjiang river in Ankang.Two conclusions are obtained.One is that the period of maximum runoff are through 4 years to 6 years,through 8 years to 10 years, through 25 years to 27 years,the other is that the period of minmum runoff are through 7 years to 9 years,through 17 years to 18 years.