中国农业科学2011，Vol.44Issue(10)：2060-2069,10.DOI:10.3846/j.issn.0578-175.2011.10.011
密云水库上游白河磷浓度时间序列的傅立叶与小波分析
Fourier and Wavelet Analysis of Phosphorus Concentration Time Series in Baihe River in Miyun Reservoir Upstream Watershed
摘要
Abstract
[Objective ] Analyzing the long-term water quality monitoring data to find temporal pattern of water quality signals over different temporal scales can assist us in understanding various processes affecting water quality temporal evolution at different scales and further ensuring watershed water quality security. [Method] Taking the phosphorus monitoring data of two sites S1 and S2 in the period 1986-2003 in Baihe River lying Miyun reservoir upstream watershed as a case, time domain analysis method, Fourier and Wavelet analysis were adopted to explore and compare the periodic patterns and temporal pattern characteristics of the two sites.[Result] The results showed that the Time Domain analysis method was not adopted due to no serial correlation and heteroscedasticity in each site series. The periodic patterns of two sites were discovered using Fourier analysis. The site S1 had a period of six years,while the site S2 had two periodic patterns of two years around and six years. The temporal pattern characteristics at different scales were obtained through wavelet analysis, which were at moderate scale for the site S1, while at moderate and small scales for the site S2.[ Conclusion ] The Fourier and wavelet analysis method can both be used in the study of surface water quality temporal change pattern,the first is a coarse method and the latter is a more detailed method for analyzing surface water quality temporal pattern characteristics.关键词
傅立叶/小波分析/总磷浓度/水质/密云水库Key words
Fourier/ Wavelet analysis/ phosphorus/ water quality/ Miyun reservoir引用本文复制引用
张微微,李红,孙丹峰,周连第..密云水库上游白河磷浓度时间序列的傅立叶与小波分析[J].中国农业科学,2011,44(10):2060-2069,10.基金项目
国家科技支撑项目(2006BABl5805)、北京市财政局项目 （2006BABl5805）
