中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2016, Vol. 35 ›› Issue (1): 76-79.DOI: 10.3969/j.issn.1674-0696.2016.01.15

• 港口航道·水利水电·资源环境 • 上一篇    下一篇

基于Morlet小波分析的嘉陵江流域年径流周期研究

牟萍,杨胜发,童思陈   

  1. 重庆交通大学 国家内河航道整治工程技术研究中心,重庆 400074
  • 收稿日期:2015-01-23 修回日期:2015-04-17 出版日期:2016-02-20 发布日期:2016-04-21
  • 作者简介:牟萍(1986—),女,山东德州人,博士研究生,主要从事水沙动力学与航道工程方面的研究。E-mail:mpdream2012@163.com。
  • 基金资助:
    国家科技支撑计划项目(2012BAB05B03);重庆市科委自然科学基金项目(CSTC 2011 JJA30002);重庆市教委项目(KJ1400319)

Periodical Analysis on Annual Runoff in Jialing River Basin Based on the Morlet Wavelet Analysis

MU Ping, YANG Shengfa, TONG Sichen   

  1. National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing 400074, P.R.China
  • Received:2015-01-23 Revised:2015-04-17 Online:2016-02-20 Published:2016-04-21

摘要: 为揭示嘉陵江流域年径流序列的周期变化特征,基于嘉陵江北碚站共计59年(1954—2012年)的实测径流资料,采用Morlet小波函数对其年径流序列进行了多时间尺度变化特性分析。 结果表明:北碚站年径流存在4,14,44年左右尺度的周期变化特征,其中44年尺度的周期包括2个丰-枯变化过程,其小波系数对应着最大峰值,为流域年径流变化的第1主周期;14年尺度的周 期包括6个丰-枯交替循环变化过程,其小波系数对应的峰值次之,为第2主周期;与第1、第2主周期相比,4年尺度的变化峰值很小,属于小波动,即嘉陵江流域年径流在整个统计时间域内的 变化由第1、第2主周期控制。

关键词: 水利工程, 年径流, Morlet 小波, 小波方差

Abstract: Based on the measured data of annual runoff series of 59 years from 1954 to 2012 in Beibei gauging station, the multi-time scale characteristics of runoff was analyzed by using Morlet wavelet to study the periodic variation of Jialing River basin. The results show that there are 4-year, 14-year, and 44-year period changes of the annual runoff of Beibei gauging station. The scale of 44-year period with the maximum peak has two cycles from the wet season to the dry season, which is the first major period of runoff series in Jialing River Basin, and the scale of 14-year period is the second major period, which has six cycles from the wet season to the dry season and whose Morlet wavelet coefficients are also secondary. Compared with the former two major periods, the change of peak value of 4-year period is small, which belongs to small fluctuations and means that the change of annual runoff in Jialing River basin is mainly affected by the first and second major periods.

Key words: hydraulic engineering, annual runoff, Morlet wavelet, wavelet variance

中图分类号: