Chemical and isotopic approach to groundwater cycle in western Qaidam Basin, China |
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| Authors: | Hongbing Tan Wenbo Rao Jiansheng Chen Zhiguo Su Xiaoxu Sun Xiaoyan Liu |
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| Institution: | [1]State Key Laboratory of Hydrology- Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China [2]Department of Earth Science and Engineering, College of Civil Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | Due to the extremely arid climate in the western Qaidam Basin, the groundwater almost becomes the single water source for
local residents and industrial production. It is necessary to know the reliable information on the groundwater cycle in this
region for reasonable and sustainable exploitation of the groundwater resources with the further execution of recycling economy
policies. This study focused on the recharge, the flow rate and the discharge of groundwater in the western Qaidam Basin through
investigations on water chemistry and isotopes. Hydrological, chemical and isotopic characteristics show that the groundwater
in the western Qaidam Basin was recharged by meltwater from new surface snow and old bottom glaciers on the northern slope
of the Kunlun Mountains. In addition, the results also prove that the source water is enough and stable, and the rates of
the circulation and renewal of the groundwater are relatively quick. Therefore, it can be concluded that the groundwater resources
would guarantee the regional requirement if the meltwater volume of the mountains has not a great changes in future, moreover,
water exploitation should be limited to the renewable amount of the groundwater reservoir in the western Qaidam Basin. |
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| Keywords: | groundwater cycle water chemistry isotope Qaidam Basin |
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