[1]丁文荣,周跃.云南省盘龙河流域河流输沙率变化的多时间尺度分析[J].水土保持研究,2007,14(06):278-279,283.
DING Wen-rong,ZHOU Yue.The Multi-time Scale Analysis on the Suspended Sediment Flux of Panlong River Basin of Yunnan Province[J].Research of Soil and Water Conservation,2007,14(06):278-279,283.
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DING Wen-rong,ZHOU Yue.The Multi-time Scale Analysis on the Suspended Sediment Flux of Panlong River Basin of Yunnan Province[J].Research of Soil and Water Conservation,2007,14(06):278-279,283.
云南省盘龙河流域河流输沙率变化的多时间尺度分析
《水土保持研究》[ISSN:1005-3409/CN:61-1272/P]
卷:
14
期数:
2007年06期
页码:
278-279,283
栏目:
出版日期:
1900-01-01
- Title:
- The Multi-time Scale Analysis on the Suspended Sediment Flux of Panlong River Basin of Yunnan Province
- 关键词:
- 河流输沙率; 复值Morlet小波变换; 多时间尺度; 云南省盘龙河流域
- Keywords:
- suspended sediment flux; complex Morlet wavelet transformation; multi-time scale; Panlong River basin of Yunnan province
- 分类号:
- TV143.6
- 摘要:
- 对云南省盘龙河流域55 a来的河流输沙率进行复值Morlet小波变换，通过分析输沙率变化的小波变换结果研究其多时间尺度特征。结果表明：盘龙河流域悬沙输移率从1951年以来总体呈波动上升趋势，且存在多时间尺度特征，有4，7，22 a的振荡周期，其中22 a的振荡周期最为明显，贯穿整个研究时段，而4，7 a时间尺度却局部性特征很强。以小波系数实部图上的零点作为判据，且以主要周期附近的小波系数实部值进行突变分析得知，对应于4 a尺度的突变有27 a，7 a尺度的突变有16 a，22 a尺度的突变有5 a。
- Abstract:
- The complex Morlet wavelet was applied to analyze the multi-time scale and abrupt characters of Panlong River of Yunnan Province, the results show:The suspended sediment flux has raised since 1951 and existed multi-time scale character; There are 3 time scales in the suspended sediment flux time series, 4 years, 7 years and 22 years, and the time-scale-22-year is very strong; When take the zeros point that near the mainly period to analyze the abrupt point, we can come to the conclusion that there are 27 times in the 4-year period scale, 16 times in the 7-year period scale and 5 times in the 22-year period scale.
参考文献/References:
[1] Kumar P, Foufoula-Geogiou E.Wavelet analysis for geophysical applications[J].Reviews of Geophysics, 1997, 35 (4):385-412.
[2] Christopher T, Gilbert P.A practical guide to wavelet analysis[J].Bulletin of the American Meteorological Society, 1998, 79 (1):61-78.
[3] 刘会玉, 林振山, 张明阳.建国以来中国洪涝灾害成灾面积变化的小波分析[J].地理科学, 2005, 25 (1):43-48.
[4] 尤卫红.气候变化的多尺度诊断分析和预测的多种技术方法研究[M].北京:气象出版社, 1998:9-20.
[5] 纪忠萍, 谷德军.广州近百年来气候变化的多时间尺度[J].热带气象学报, 1999, 15 (1):48-55.
[6] 林振山.气候建模、诊断和预测的研究[M].北京:气象出版社, 1996:176-186.
备注/Memo
收稿日期:2007-1-28。
基金项目:国家重点基础发展计划（973）项目（2003CB415105-6）
作者简介:丁文荣（1979- ），男，云南人，博士，主要从事水土保持与水沙模型研究。
更新日期/Last Update:
1900-01-01