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- [7] Using the concept of ecological groundwater level to evaluate shallow groundwater resources in hyperarid desert regions[J]. Qi FENG1,2,3,JiaZhong PENG1,3,JianGuo LI1,3,HaiYang XI1,3,JianHua SI1,3 1 Alashan Desert Eco-hydrology Experimental Research Station,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China;2 Department of Geography,Shaanxi Normal University,Xi’an 710062,China;3 Gansu Hydrology and Water Resources Engineering Ce