黄河上中游天然径流多时间尺度变化及动因分析

运用小波分析等方法对黄河上中游天然径流序列进行了分析,揭示了河川径流多时间尺度变化规律,并对径流在不同时间尺度上变化的影响因素进行了探讨。研究结果对于认识黄河径流的变化规律、开发利用管理黄河水资源有着重要的意义。

Multple time scales analysis and cause of runoff changes of the upper and middle reaches of the Yellow River

Because of the influence of climate change and human activities,runoff change has oc-curred.This paper analyzes the natural runoff series of the upper and middle reaches of the Yel-low River with the theory of wavelet transformation,reveals multi-time scale changes rule of runoff,and discusses the influencing factors of runoff multi-time scale changes.The results showed that climatic conditions such as precipitation mainly controlled river runoff variations.But varia-tions in drainage basin underlying surface and local climate factor brought by human activity af-fected natural annual runoff.The results are important to know runoff changes and to exploit wa-ter resources of the upper and middle reaches of the Yellow River.