| 黄河下游年径流量及输沙量变化的EMD分析 |
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| 引用本文： | 任健,史红玲.黄河下游年径流量及输沙量变化的EMD分析[J].人民黄河,2012(8):33-35. |
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| 作者姓名： | 任健 史红玲 |
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| 作者单位： | 中国水利水电科学研究院;国际泥沙研究培训中心 |
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| 基金项目： | 水利部公益性行业科研专项(200901021) |
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| 摘 要： | 运用EMD方法对黄河下游花园口站1952—2009年年径流量及年输沙量的时间序列资料分别进行了多时间尺度分析,得到了各自具有不同周期的波动分量以及趋势分量。结果表明:黄河下游年径流量、年输沙量的变化过程具有复杂的多时间尺度特性,是多种波动成分共同作用的结果;年径流量和年输沙量变化过程均存在3个波动周期,而趋势项呈递减的态势;相同尺度下的水、沙分量之间具有显著的相关性,而不同尺度下的水、沙分量之间基本无相关性。
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| 关 键 词： | EMD 多时间尺度 年径流量 年输沙量 花园口站 黄河下游 |
Variations of Annual Runoff and Sediment in the Lower Yellow River Based on EMD Analysis |
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| REN Jian,SHI Hong-ling.Variations of Annual Runoff and Sediment in the Lower Yellow River Based on EMD Analysis[J].Yellow River,2012(8):33-35. |
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| Authors: | REN Jian SHI Hong-ling |
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| Affiliation: | 1.China Institute of Water Resources and Hydropower Research,Beijing 100048,China; 2.International Research and Training Center on Erosion and Sedimentation,Beijing 100048,China) |
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| Abstract: | The method of Empirical Mode Decomposition(EMD) was applied to the annual runoff and sediment at Huayuankou Station in the lower Yellow River from 1952 to 2009,and several intrinsic mode functions(IMFs) and one residual function were obtained from each series.The results show as follows: there is complex multiple time-scale character in the series of annual runoff and sediment of the lower Yellow River.It is induced by the fluctuation components jointly.The annual runoff and sediment series have 3 fluctuations respectively.The residual functions of the two series are depressed.The same time scale components of the two series have notable relativity,however the different time scale components have little relativity. |
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| Keywords: | Empirical Mode Decomposition multiple time-scale annual runoff annual sediment Huayuankou Station lower Yellow River |
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