论文以黄河中游潼关站汛期水沙序列(1952~2001年)为资料,运用小波分析方法对其进行了多时间尺度和趋势变化规律的分析。结论如下:①小波多尺度分析表明黄河中游汛期水沙具有多时间尺度变化特征,各种时间尺度在时域上分布不均匀,时间尺度不同,径流量、输沙量所处的丰枯阶段不同;②小波方差分析表明汛期径流量的变化周期主要是25年,其次是11年和3年;而汛期输沙量的变化周期主要是12年,其次是25年和5年;③趋势上,径流量的变化趋势比较复杂,在整个过程中,有升有降,而输沙量序列的整体趋势是下降的。由此可见黄河中游汛期径流量与输沙量并不是同步变化的。 The paper takes the flood and sediment sequence (from 1952 to 2001) of Tongguan station in the middle reaches of the Yellow River as the data, and analyzes the laws of multi-time scales and trends using wavelet analysis. The conclusions are as follows: ①Wavelet multiscale analysis shows that the water and sediment in the flood season in the middle reaches of the Yellow River has many time-scale characteristics. The distribution of various time scales in the time domain is uneven, and the time scales are different. ; ②Wavelet variance analysis shows that the variation period of flood season runoff is mainly 25 years, followed by 11 years and 3 years; and the flood season sediment change cycle is mainly 12 years, followed by 25 years and 5 years; ③The trend, The trend of runoff is more complicated. During the whole process, there is a rise and fall, while the overall trend of sediment discharge is declining. This shows that the flood season in the middle reaches of the Yellow River runoff and sediment concentration does not change simultaneously.