Characteristics of water stable isotopes and hydrograph separation in Baishui catchment during the wet season in Mt.Yulong region, south western China
Characteristics of water stable isotopes and hydrograph separation in Baishui catchment during the wet season in Mt.Yulong region, south western China
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DOI：
10.1002/hyp.9479
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发表时间：
2013-12
影响因子：
3.2
通讯作者：
T. Pu;Yuanqing He;Guo-feng Zhu;Ningning Zhang;Jiankuo Du;Chun-Feng Wang
中科院分区：
文献类型：
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作者：
T. Pu;Yuanqing He;Guo-feng Zhu;Ningning Zhang;Jiankuo Du;Chun-Feng Wang
冰川对当地居民的生计至关重要，他们依赖冰川融水提供水和能源。为此，在中国西南部的一个小冰川流域内，在雨季期间，冰川溪流水的氧-18的季节变化及其来源进行了调查。结果表明，融水、雨水、地下水和溪流中的O2 - 18存在显著差异，观测期间降水量存在明显的季节变化。白水流域的径流被分离成冰-雪融水和降水使用氧-18的组件。根据双组分混合模型的结果，平均而言，53.4%的径流来自雨季的冰雪融化，而其余46.6%则来自集水区的降水。从月过程线来看，雪和冰川融水的贡献在40.7%~ 62.2%之间，降水的贡献在37.8%~ 59.3%之间。这种分离的不稳定性主要是由示踪剂浓度的变化引起的。在我国西南冰川地区水资源管理中，应重视冰川融水和融雪水的作用。版权所有© 2012约翰威利父子有限公司.
Glaciers are of crucial importance for the livelihood of the local populations, which depend on their meltwater for water and energy supplies. For this reason, seasonal variations of oxygen‐18 of glacial stream water and their sources within a small glacial catchment in south western China were investigated during the wet season. The results showed significant difference of oxygen‐18 existed among meltwater, rainwater, ground water and stream water, and significantly seasonal variation of precipitation occurred during the observed period. The streamflow of Baishui catchment was separated into components of ice‐snowmelt and precipitation using oxygen‐18. As shown by the result of the two‐component mixing model, on average, 53.4% of the runoff came from ice‐snowmelt during the wet season, whereas the remaining 46.6% were contributed by precipitation in the catchment. According to monthly hydrograph, the contribution of snow and glacier meltwater varied from 40.7% to 62.2%, and that of precipitation varied from 37.8% to 59.3% in wet season. Uncertainties for this separation were mainly caused by the variation of tracer concentrations. The roles of glacier and snow meltwater should be noticed in water resource management in those glacial regions in south western China. Copyright © 2012 John Wiley & Sons, Ltd.