Analysis on Periodic Variations and Trend of Annual Runoff in the Yarlung Zangbo River with HilbertHuang Transform[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2010,49(1):125-130.
Analysis on Periodic Variations and Trend of Annual Runoff in the Yarlung Zangbo River with HilbertHuang Transform[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2010,49(1):125-130.DOI:
This study applied the HilbertHuang Transform (HHT) in the multipletimescales analysis of annual runoff series in the Yarlung Zangbo River. With the measured annual runoff data from 1956 to 2000 in the Yarlung Zangbo River
the Intrinsic Mode Function (IMF) and Hilbert spectrum were used to extract hydrological time series periods and the evolution trends of the natural annual runoff. The results showed that the annual runoff periods of the Yarlung Zangbo River include 3
6~8
9
11~13
16~17 and 22~24 years
respectively. It indicated that the annual runoff of the main and tributary of the Yarlung Zangbo river had an obvious decline trend during 1960s and reached the minimum in 1980s. since then
the annal runoff increased and a relatively wet season occurred in 1990s.
关键词
雅鲁藏布江HilbertHuang变换径流周期分析变化趋势
Keywords
the Yarlung Zangbo RiverHilbertHuang Transformrunoffperiodic variationevolution trend