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中文摘要：
应用EMD方法对泾河张家山水文站1956-2005年还原径流系列进行多时间尺度分析,结果表明泾河年径流量具有复杂多时间尺度的周期性,其变化特性分别具有准2-4、准4-8和准11-13的周期。运用SPA方法研究泾河年径流量与EMD中基本模式分量IMF的关系表明,泾河年径流量与IMF分量的联系在短周期上仍以同一性为主,在中周期以对立性为主,在长周期以差异性为主。
英文摘要：
In order to analyze deeply the fluctuations of runoff,the natural annual runoff time series from 1956 to2005 of Zhangjiashan hydrological station on the Jinghe River of China were decomposed into multi-time scales with the empirical mode decomposition method. The results show that the natural runoff of Jinghe River had a complex periodic fluctuation with multi-time scales,and the periodic fluctuations were of 2 to 4 years in the short period series,4 to 8 years in the middle period series,and 11 to 13 years in the long period series. It was highly consistent with the change period of El Nino,the air-sea intersection and solar activity. The set pair analysis on annual runoff with multi-time scales show that the relations between the natural runoff of Jinghe River and its intrinsic mode functions components presented mainly the identify on the short period level,the contrary on the middle period level and the discrepancy on the long period level. Moreover it reveals that the runoff changed on the short period level can basically reflect the average state of Jinghe River.
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