摘要
为研究东江流域径流变化周期,采用Morlet连续小波变换,对东江干流龙川站和博罗站45 a(1956—2000)的年径流时间序列变化特征进行多时间尺度分析,揭示出东江流域年径流在不同尺度下的时频变化特征及多尺度变化、主周期变化、大小尺度嵌套和总趋势变化等规律,并应用小波系数实部过程线和小波方差进行了检验。结果表明,东江流域年径流变化呈现多尺度性、主周期性、同步性和总趋势增加的规律。
In order to study the runoff variation period of Donjiang River Basin, this paper used Morlet continuous wavelet transform method to do the multi-timescales analysis of the annual flow time series characteristic of Longchuan and Boluo survey stations＇ annual flow time series in 45 years（ 1956—2000）. This paper presents the changing law of the time-frequency characteristics, the multi-scale variations, the major period variations, the nested size-scale and the total trend under different scales. Besides it also used the wavelet coefficients real component process line and wavelet variance to verify the results. The results show that the annual runoff variation of the Dongjiang River Basin is proven to be multi-scale, major periodicity, synchronism and increasing trend.
作者
李凯娟
张代青
侯玉强
LI Kaij＇uan ZHANG Daiqing HOU Yuqiang(Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, Chin)
出处
《人民珠江》
2017年第6期1-5,共5页
Pearl River
基金
国家自然科学基金项目(51469009)
广东省哲学社会科学"十三五"规划项目(GD16CGL10)
关键词
小波分析
径流变化周期
小波系数图
主周期
东江流域
wavelet analysis
periods of annual flow
wavelet coefficient diagrams
major period
Dongjiang River Basin
