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Annual runoff change in the headstream of Yangtze River and its relation to precipitation and air temperature

机译：长江上游径流量年变化及其与降水和气温的关系

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摘要

We analyse the change trends of the annual and seasonal runoff series of the hydrological station Batang on the headstream of the Yangtze River over the period 1960-2007. The relations between runoff series and precipitation and temperature conditions are investigated, and the influence of the refreezing process of meltwater of the glaciers on the Yangtze River flow is examined with the proposed accumulated temperature deficit (ATD) index. It is found that annual runoff at the Batang station is not stable during the period 1960-2007. From 1960 to 1980, there was a rather strong decrease of 14.4 m~3 s~(-1) year~(-1) on average in spite of the statistically significant increase in air temperature and rather stable precipitation. It is argued that the annual rate of glacier runoff generation is possibly controlled by the ATD rather than by the direct air temperature. Seasonal analysis indicates that ATD might be of greater influence in autumn and winter in affecting runoff than in spring and summer. The research in this paper may be helpful in understanding how the hydro-climatic conditions affect runoff generation in the cold regions.
机译：我们分析了长江源头八塘水文站1960-2007年期间年径流量和季节径流量的变化趋势。研究了径流序列与降水量和温度条件之间的关系，并利用拟议的累积温差（ATD）指数研究了冰川融水的再冻过程对长江水流的影响。发现在1960-2007年期间八塘站的年径流量不稳定。从1960年到1980年，尽管气温有统计学上的显着提高，并且降水量相当稳定，但平均水平还是有14.4 m〜3 s〜（-1）年〜（-1）的大幅下降。有人认为，冰川径流的年生成率可能是由ATD控制的，而不是由直接气温控制的。季节性分析表明，秋季和冬季，ATD对径流的影响可能大于春季和夏季。本文的研究可能有助于理解水文气候条件如何影响寒冷地区的径流产生。

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  • 来源
    《Nordic hydrology》 |2013年第5期|850-874|共25页
  • 作者

    Lihua Xiong; Kunxia Yu; Honggang Zhang; Liping Zhang;

  • 作者单位

    State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;

    State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;

    Bureau of Hydrology, Yangtze River water Resources Commission, Wuhan 430010, China;

    State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    air temperature; annual runoff; change trend; glacier runoff generation; Yangtze River;

    机译：气温;年度径流;变化趋势;冰川径流产生扬子江;

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