Multi-Scale Variability and Trends of Streamflow in Dongjiang River Basin, South China
Based on monthly streamflow data, Morlet wavelet transform method was used to analyze multi-scale variability of streamflow in the Dongjiang River Basin, South China. The results showed that the total annual streamflow in the Dongjiang River Basin decreased weakly from 1956 to 2005, and the rate of decrease was 2.2×l08m3/10yr. Multi-scale variability characteristics existed, which accounted for different aspects of the changes in annual streamflow, and the major periods of the runoff time series were identified as about 19 years, 12 years, 8 years and 4 years with decreasing levels of fluctuation. The multi-time scale characteristics of time-frequency for wavelet analysis can demonstrate the detailed structures of annual streamflow variations.
multi-scale variability streamflow climate change wavelet transform Dongjiang River
Lirong Song
College of Hydrology and Water Resources, Hohai University, Nanjing, China
国际会议
三峡
英文
854-857
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）