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首页> 外文会议>2011 International Conference on Electric Technology and Civil Engineering >Analyses of climate change and response of alpine glacier-river runoff in Hailuogou basin, Mount Gongga, China, by using δ2H and δ18O
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Analyses of climate change and response of alpine glacier-river runoff in Hailuogou basin, Mount Gongga, China, by using δ2H and δ18O

机译：利用δ 2 H和δ 18 O分析中国贡嘎海螺沟盆地高寒冰川河径流的响应

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The climate changes and the associated Hailuogou glacier-river runoff were discussed by analysis of the existing available meteorological and hydrologic data in Hailuogou basin. To better assess the effect of climate change on the stream flow of this river, stable isotope composition was measured on different types of water samples, including meteoric water, stream water, ice-snow melt water and ground water in 2008–2009. The results of this work indicate that: (i) as the annual average temperature in Hailuogou basin rose by 0.5 °C in recent 20-years, the mean runoff increased by 2.1% annually. Analyses of meteorological and hydrologic data suggest that changes of the glacier river runoff have responded to climatic fluctuations; (ii) analysis of the measured isotopic data demonstrate that precipitation provides the main part of seasonal variations of runoff of the study river, the effect of change in temperature suggests a linear increase in ice-snow meltwater and total streamflow. (iii) ice-snow meltwater is the main source of this alpine glacier river. Using a δ18O based hydrologic model, we estimated that the annual contribution of ice-snow meltwater over the total stream flow varied from 81.9% to 85.57% in its upper reach. Quantitative evaluation of the relationship between climate fluctuation and the river runoff is difficult because of the limited available long-term meteorological and hydrologic data in the alpine area in the periphery of the Qinghai-Tibetan Plateau.
机译：通过分析海螺沟盆地现有的可用气象和水文数据，讨论了气候变化和相关的海螺沟冰川河径流。为了更好地评估气候变化对这条河流的水流的影响，在2008-2009年期间，对不同类型的水样进行了稳定同位素组成的测量，这些水样包括陨石水，溪流水，冰雪融化水和地下水。这项工作的结果表明：（i）由于最近20年海螺沟盆地的年平均温度上升了0.5°C，平均径流量每年增长2.1％。气象和水文数据分析表明，冰川河流径流的变化已对气候波动作出了反应; （ii）对测得的同位素数据的分析表明，降水是研究河流径流季节变化的主要部分，温度变化的影响表明冰雪融水和总流量呈线性增加。 （iii）冰雪融水是这条高山冰川河的主要来源。使用基于δ 18 O的水文模型，我们估计冰雪融水在其上游的总流量中的年贡献率从81.9％到85.57％不等。由于青藏高原外围高寒地区长期可获得的长期气象和水文数据有限，因此难以对气候波动与河流径流量之间的关系进行定量评估。

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