| 基于EMD的官厅水库天然年径流量变化多时间尺度分析 |
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| 引用本文： | 黄伟,杨志刚,丁志宏. 基于EMD的官厅水库天然年径流量变化多时间尺度分析[J]. 西北水资源与水工程, 2008, 19(1): 49-52 |
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| 作者姓名： | 黄伟 杨志刚 丁志宏 |
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| 作者单位： | [1]中国水电顾问集团成都勘测设计研究院,四川成都610072 [2]水利部海河水利委员会,天津300170 [3]天津大学建筑工程学院,天津300072 |
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| 摘 要： | 针对小波变换的不足之处，对官厅水库1956～2000年还原后的入库天然年径流量时序运用EMD方法进行多时间尺度分解，发现其天然年径流量存在准2～3年、准7～8年、准15年的波动周期，并分析了各分量的趋势变化及其影响因素。结果表明，EMD作为一种全新的多分辨率信号处理方法，可以更精确地提取年径流量时序中不同波动周期的分量，在水文水资源变量的分析及建模中具有广阔的应用前景。
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| 关 键 词： | EMD 年径流量 多时间尺度 官厅水库 |
Based on EMD the multiple time-scale analysis to the changes of natural annual runoff of the Guanting Reservoir |
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| Affiliation: | HUANG Wei, YANG Zhi-gang, DING Zhi-hong (1. Chengdu Hydroelectric Investigation and Design Institute of SPC, Chengdu, Sichuan 610072, China; 2. Haihe Water Resources Committee of Ministry of Water Resources, Tianjin 300170, China; 3. School of Civil Engineering, Tianjin University, Tianjin 300072, China) |
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| Abstract: | Pointed to the shortage problem of Wavelet Transform, the natural annual runoff time series from 1956 to 2000 of Guanting Reseroir was decomposed by multiple time-scale series with EMD method. The results shown that the runoff time series existed with periods fluctuating about 2～3, 7～8 and 15 years, and the trends of the sub-series and their influence factors were analyzed. The results shown that EMD as for an original multiple-resolution signal processing method the sub-series of different fluctuation periods can be more accurately separated from annual runoff time series. This method can be widely used into variable analysis and modeling of hydrology and water resources. |
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| Keywords: | EMD annual runoff multiple time-scale Guanting Reservoir |
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