Abstract
Poyang Lake is located in the northern part of Jiangxi Province, is one of the important Yangtze River flood storage lakes. Use Mann-Kendall test the trends and mutation of the Poyang Lake area rainfall time series, and use singular spectrum analysis (SSA) method to analyze the time series of periodic oscillation characteristics. The results showed that, the Poyang Lake area rainfall time series no significant upward or downward trend, there are quasi 4-5 years, 8-11 years, 20-year periodicity.
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