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中文摘要：
在这研究，54年( 1950～2003 )从2月，4月，8月，和11月的每月的流量系列，以及年度流量系列，在 Huayuankou 和 Lijin 水文学车站测量了被选择为代表性的数据，并且连续小浪变换(享特威)被使用在中间和更低的黄河的流量政体上分析人的活动的影响。在 1970 的变化的一个点首先被决定，并且当那些根据线性趋势在 1970 以后被恢复时，在 1970 前的观察系列被认为流量自然。然后， CWT 被用于两个在多时间的规模揭示他们的变化的观察并且恢复的流量系列包括 1-4 的五个时间的范围， 6-8， 9-12， 16-22，和 22-30 年，和在 54 年的时间的规模的趋势。这些分析结果详细被比较并且讨论。在结论，因为人的活动的影响，在在中间的流量政体有重要变化并且自从 1970，降低黄河。年度流量的腐烂的趋势变得更显著，并且流量的内部年度的分发变化了，但是人的活动几乎没在流量的周期的特征上有很少影响。
英文摘要：
In this study, the 54-year （1950 to 2003） monthly runoff series from February, April, August, and November, as well as the annual runoff series, measured at both Huayuankou and Lijin hydrological stations were chosen as representative data, and the continuous wavelet transform （CWT） was applied to analyze the impacts of human activities on the runoff regime of the middle and lower Yellow River. A point of change in 1970 was first determined, and the observed series before 1970 were considered natural runoff while those after 1970 were restored according to linear trends. Then, the CWT was applied to both the observed and restored runoff series to reveal their variations at multi-temporal scales, including the five temporal ranges of 1-4, 6-8, 9-12, 16-22, and 22-30 years, and the trend at the temporal scale of 54 years. These analysis results are compared and discussed in detail. In conclusion, because of the impacts of human activities, there have been significant changes in the runoff regime in the middle and lower Yellow River since 1970. The decaying tendency of annual runoff has become more pronounced, and the inner-annual distribution of runoff has changed, but human activities have had little impact on the periodic characteristics of runoff.
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