小波能量谱在流域径流研究中的应用分析  

Application of Wavelet-energy Spectrum into Watershed Runoff Model

作　　者：万星[1,2] 唐天国[3] 乐丰[2] 

机构地区：[1]重庆交通大学机电学院,重庆400074 [2]重庆交通大学河海学院,重庆400074 [3]四川大学建环学院,四川成都610065

出　　处：《水力发电》2008年第11期35-38,共4页Water Power

基　　金：国家自然科学基金重点资助项目(50579022);重庆市科委自然科学基金项目(CSTC;2007BB6431)

摘　　要：流域径流量受诸多因素影响,其变化复杂,仅凭观测站统计数据难以发现其演变规律。将流域时序径流曲线进行Morlet小波分解,提取分解后的近似和细节部分,再将其用FFT技术变换到能量频域,以期发现流域径流模型的变化规律,为该流域水资源的合理开发及利用提供决策参考。结果表明,对三峡流域径流数据的Morlet小波分解后,能找到其合理的演变规律,为三峡库区水资源的合理利用提供一定参考价值。Watershed runoff capacity is generally influenced by many factors and its change is complex. It is hard to find its evolution laws by statistical data from observation stations. The watershed runoff curve is decomposed from Morlet wavelet and its approximations and details are extracted. These approximations and detail signals are calculated with Fast Fourier Transform in order to discover the change laws of runoff model of the river basin, which can provide decision reference of rational development and utilization of water resources in such river basin. The results showed that after the runoff data of Three Gorges watershed are decomposed by the Morlet wavelet, its evolution laws can be gained, which provides some reference for the rational utilization of water resources in the Three Gorges watershed.

关 键 词：流域径流模型 小波变换 能量谱 快速傅立叶变换(FFT) 

分 类 号：TM743[电气工程—电力系统及自动化]