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Arid Land Geography ›› 2021, Vol. 44 ›› Issue (4): 934-942.doi: 10.12118/j.issn.1000–6060.2021.04.06

• Climatology and Hydrology • Previous Articles     Next Articles

Stable isotopes characteristics of precipitation, surface water and groundwater in Ebinur Lake Basin

HAO Shuai1,2(),LI Fadong3,4(),LI Yanhong1,2,ZHU Nong3,QIAO Yunfeng3,4,TIAN Chao3,4,YANG Han1,2,FU Kai1,2   

  1. 1. College of Geographic Science and Tourism, Xinjiang Normal University, Urumqi 830054, Xinjiang, China
    2. Key Laboratory of Xinjiang Uygur Autonomous Region, Xinjiang Laboratory of Lake Environment and Resources in Arid Area, Urumqi 830054, Xinjiang, China
    3. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    4. College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-11-23 Revised:2021-05-05 Online:2021-07-25 Published:2021-08-02
  • Contact: Fadong LI E-mail:haoshuai1869@163.com;lifadong@igsnrr.ac.cn

Abstract:

The study considered the precipitation, surface water, and groundwater of the Ebinur Lake Basin, Xinjiang, China as the research object. Combining the hydrogeological data, the temporal and spatial variation characteristics of hydrogen and oxygen isotopes of different water bodies in the basin were analyzed using field study, laboratory tests, and statistical analysis. The results show that: (1) the δ2H and δ18O of precipitation in the Ebinur Lake Basin range from -148.2‰ to -34.5‰ and -20.16‰ to 1.20‰, respectively. The slope of the local meteorological water line is 6.69, precipitation δ18O has a significant positive correlation with air temperature and a negative correlation with precipitation in summer. (2) Surface water δ2H and δ18O vary from -101.0‰ to -17.0‰ and -14.54‰ to 0.29‰, with the largest change in August, followed by May and October. The isotopic value of the Bortala River gradually increases from upstream to downstream, but the change in the trend of the Jinghe River is not obvious. δ18O is positively correlated with temperature and negatively correlated with altitude. Compared with river water, the isotopic values of lake water increase significantly in different seasons, reflecting the high evapotranspiration and concentration of lake water. (3) The groundwater δ2H and δ18O range from -85.0‰ to -65.5‰ and -12.18‰ to -9.05‰, respectively, and the average values are -75.5‰ and -11.00‰, respectively. The isotopic value of groundwater in the Bortala River region increases gradually from upstream to downstream, but it is not obvious in the Jinghe River region, which can be attributed to the different recharge sources and evaporation intensity in different sections of the river. The determination of stable isotopes in the Ebinur Lake Basin provides a basis for clarifying the hydrological process of the basin, which is of great importance for the effective use of water resources and the maintenance of ecological security in the face of environmental changes.

Key words: precipitation, surface water, groundwater, stable isotopes, Ebinur Lake Basin