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依据清代陕县万锦滩志桩水位记录和阿尼玛卿山祁连圆柏树轮,分别重建器测资料之前的三门峡和唐乃亥黄河汛期径流量,得到1766~2000年河源与中游年际分辨率的汛期径流量序列。中游与河源段流量都存在着具有明显阶段性的4~6 a周期和50 a周期,前一周期在1820年代前后与1960年代前后一致,而后一周期则基本贯穿两流量序列的置信区间之内。交叉小波分析显示,两者在年代际尺度上相关性最好,而在年际尺度上,则有非常明显的中游变化滞后于河源3~5 a的现象。年代际规模上黄河上中游的枯流首先是自然变化的结果。
According to the records of the water level of Zhijin Beach in Shan County and the Qilian Junlu round of the Animaqing Mountains in the Qing Dynasty, the runoffs of the Sanmenxia and Tangaihai Yellow Rivers before reconstruction were reconstructed respectively to obtain interannual resolution of the Heyuan and middle reaches from 1766 to 2000 Flood season runoff sequence. There are obvious periods of 4 ~ 6 a cycles and 50 a cycles in the midstream and the Heyuan section. The former cycle was consistent with that before the 1960s and the latter cycle was basically within the confidence interval of the two flow sequences . Cross-wavelet analysis shows that the correlation between the two is the best on interdecadal scale, while on the interannual scale, there is a very obvious phenomenon that the change of middle reaches lags 3-5 years behind Heyuan. The decanter scale in the upper and middle reaches of the Yellow River is, above all, the result of natural changes.