丽水汛期降水多时间尺度演变特征

The Multi-time-scale Analysis of Flood Season Precipitation Evolution in LiShui City

摘要: 根据1953—2008年丽水汛期逐月降水量资料,在利用趋势分析和Morlet连续小波变化对汛期降水时频变化特征进行分析的基础上,利用功率谱及Mann-Kendall检验等方法对丽水汛期降水的周期性特征及突变性进行检验。结果表明:20世纪90年代

Abstract: Based on the monthly mean precipitation data from 1953 to 2008 in Lishui, the change tendency and Morlet wavelet transform were first used to analyze the time-frequency characteristics of flood season precipitati