Sun Congjian, Li Xingong, Chen Yaning, Li Weihong, Stotler Randy L, Zhang Yongqing
a School of Geographical Science , Shanxi Normal University , Linfen , Shanxi Province , China.
b State Key Laboratory of Desert and Oasis Ecology , Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences (CAS) , Urumqi , Xinjiang , China.
Isotopes Environ Health Stud. 2016 Jun;52(3):281-97. doi: 10.1080/10256016.2016.1125350. Epub 2016 Feb 10.
By using 233 isotope samples, we investigated the spatial and temporal variations of δ(18)O and δ(2)H in precipitation and surface water, and the contribution of different water sources in the rivers within the Tarim River Basin (TRB), which receives snow/glacier meltwater, groundwater, and rainfall. Our study revealed a similar seasonal pattern of precipitation δ(18)O and δ(2)H at both the north and south edges of the basin, indicating the dominant effect of westerly air masses in the summer and the combined influence of westerly and polar air masses during the winter, although the southern part showed more complex precipitation processes in the summer. River water in the basin has relatively large temporal variations in both δ(18)O and δ(2)H showing a distinct seasonal pattern with lower isotope values in May than in September. Higher d-excess values throughout the year in the Aksu river and the Tizinafu river suggest that water may be intensively recycled in the mountains of the TRB. Based on isotopic hydrograph separation, we found that groundwater is the main water source that discharges the entire basin although individual rivers vary.
通过使用233个同位素样本，我们研究了塔里木河流域（TRB）内降水和地表水的δ(18)O和δ(2)H的时空变化，以及该流域内不同水源对河流的贡献，塔里木河流域接受雪/冰川融水、地下水和降雨。我们的研究揭示了该流域南北边缘降水δ(18)O和δ(2)H的季节性模式相似，表明夏季西风气团起主导作用，冬季西风气团和极地气团共同影响，尽管南部地区夏季降水过程更为复杂。该流域河流水体的δ(18)O和δ(2)H在时间上变化相对较大，呈现出明显的季节性模式，5月的同位素值低于9月。阿克苏河和提兹那甫河全年的d-过剩值较高，表明塔里木河流域山区的水体可能存在强烈的再循环。基于同位素水文过程线分离，我们发现地下水是整个流域的主要水源，尽管不同河流情况有所不同。
