小波方法在澜沧江降水量周期变化分析中的应用

计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (8): 236-237.

小波方法在澜沧江降水量周期变化分析中的应用

刘刚^1,2,刘纪平¹,赵荣¹,张清浦¹

1.中国测绘科学研究院政府地理信息系统研究中心，北京 100039
2.信息工程大学测绘学院，郑州 450052

收稿日期:2007-07-09 修回日期:2007-08-28 出版日期:2008-03-11 发布日期:2008-03-11
通讯作者: 刘刚

Analysis of periodical variation of Lancang river based on wavelet transform

LIU Gang^1,2,LIU Ji-ping¹,ZHAO Rong¹,ZHANG Qing-pu¹

1.Chinese Academy of Surveying and Mapping，Beijing 100039，China
2.Institute of Surveying and Mapping，University of Information Engineering，Zhengzhou 450052，China

Received:2007-07-09 Revised:2007-08-28 Online:2008-03-11 Published:2008-03-11
Contact: LIU Gang

摘要/Abstract

摘要： 采用Morlet复小波对澜沧江下游段降水量进行分析，揭示了澜沧江下游地区年度降水量的多尺度振荡特性和周期性变化，确定了主周期。分析结果表明，澜沧江下游河段在24a时间尺度上存在明显的周期性丰、枯变化，其它在12a和36a尺度上的周期性振荡能量较弱，周期变化不明显。根据主周期预测，2004年～2010年该地区处于降水量偏多期的末段，逐步趋于下一个枯水期的到来。

Abstract: The Morlet wavelet is used to analyse the variation of the runoff series of Changdu，Jiuzhou，Jinghong of Lancang river basin after the vacancy of which had been filled.The dominant periods of the runoff in different hydrologic stations are confirmed，and the periodical variation and fluctuation of rainy season and dry season with multi-scale of time are analysized.The result shows that the runoff in rainy season controls the variation of the runoff of the whole year.There is a dominant period of 14 years in the whole river basin，and the linear trend of the runoff is decreasing slowly.The runoff in the period of 2004~2010 is in the last stage of a high flow period，and another low water period is coming.

刘刚^1,2,刘纪平¹,赵荣¹,张清浦¹. 小波方法在澜沧江降水量周期变化分析中的应用[J]. 计算机工程与应用, 2008, 44(8): 236-237.

LIU Gang^1,2,LIU Ji-ping¹,ZHAO Rong¹,ZHANG Qing-pu¹. Analysis of periodical variation of Lancang river based on wavelet transform[J]. Computer Engineering and Applications, 2008, 44(8): 236-237.