摘要
采用Morlet小波函数,对玛纳斯河年径流时间序列变化特征进行了多时间尺度分析,并利用小波变换时频局部化功能,将水文序列的频率特征在时间域上展现出来,得出了各种周期的强弱和分布情况,揭示了玛纳斯河径流变化多时间尺度的复杂结构,分析了不同时间尺度下的径流序列变化周期和丰枯突变点,并通过小波方差检验,得出玛纳斯河年径流时间序列存在27年、16年和22年左右的周期变化,这是玛纳斯河年径流在时间域内变化的主要特性。
The paper, by applying the Morlet wavelet function, made on the wavelet analysis to the Manasi river runoff sequence. Using wavelet transform time-frequency localized functions, the frequency characteristics of hydrological time series in the time domain revealed itself, and gave the clear strength of the periods and distribution. The Manasi river runoff changes the most of the time, so the complex structure was promulgated. And the periods of runoff and points of abrupt change at different time scales were analyzed. The wavelet variance verification indicates that the main periods of the runoff variation along the Manasi River are 27 years, 16 years and 22 years respectively in order of importance, it＇s a dominant factor of the runoff characteristic changes in the time domain.
出处
《石河子大学学报（自然科学版）》
CAS
2008年第1期80-82,共3页
Journal of Shihezi University(Natural Science)
基金
新疆兵团高新技术研究发展计划项目(2007GX17)
关键词
玛纳斯河
径流
周期
小波分析
the Manasi river
runoff
period
wavelet analysis
