| 黄河上游径流量演变特征及成因研究 |
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| 引用本文： | 李栋梁,张佳丽.黄河上游径流量演变特征及成因研究[J].水科学进展,1998,9(1):22-28. |
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| 作者姓名： | 李栋梁 张佳丽 |
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| 作者单位： | 1.甘肃省气候资料中心 兰州 730020; |
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| 基金项目： | “九五”国家重中之重科技项目(96-908-05-03) |
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| 摘 要： | 利用黄河上游唐乃亥水文站1956年～1994年各月平均径流量资料,对其自身的变化规律进行诊断分析。结果表明:黄河上游月平均径流量具有很好的持续性,尤其是冬半年,其显着落后自相关可达6～8个月以上,即从秋季到次年初夏,转折期在8月～9月。近40年来,黄河上游流量经历了由小-大-小的演变过程,年径流量表现出较明显的7年周期,而秋季流量呈14年振荡。就径流各级别出现的概率而言,枯水年占41%,异常年份达2/3.夏秋季高原降水量对同期及落后半年之内的径流有显着贡献。前期青藏高原热力作用及大气环流特征对夏秋流量预测具有一定的指示性。
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| 关 键 词： | 黄河 径流量 演变特征 青藏高原 热力作用 大气环流 |
| 收稿时间： | 1996-01-23 |
A Sutdy on the Feature and Cause of Runoff in the Upper Reaches of Yellow River |
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| Li Dongliang,Zhang Jiali,Quan Jianrui,Zhang Kejian.A Sutdy on the Feature and Cause of Runoff in the Upper Reaches of Yellow River[J].Advances in Water Science,1998,9(1):22-28. |
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| Authors: | Li Dongliang Zhang Jiali Quan Jianrui Zhang Kejian |
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| Affiliation: | 1.Gansu Province Climate Data Centre, Lanzhou 730020;2.Lanzhou Central Meteorological Observatory, Lanzhou 730020 |
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| Abstract: | In this paper a diagnostic analysis has been performed by using the data of monthly mean runoff of Tangnaihai hydrometric station in the upper reaches of Yellow River from 1956 to 1994.It is shown that there is a good persistence in winter half year especially,its significant lag correlation can reach more than 6～8 mont hes from Automn to nextearly Summer,the inflexion period is from Aug.to Sept.In recent 40 years,the runoff evolution was a poor to rich to poor processes.The anuual mean runoff appeared obviously 7 year period and 14 year oscillation in Automn.The probability of the flow-off in each rank is forty-one percent of low flow years,the anomaly year can reached two-third.Precipition over Tibetan plateau in summer and Automn have obviously contribution to runoff at the contemporary and lag half year.The early thermal for cing over tibetan Plateau and feature of general circulation have an indication to the runoff forecast in Summer and Automn. |
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| Keywords: | Yellow River runoff change feture Tibetan Plateau thermal forcing general circulation |
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