敦煌月牙泉域地下水系统水文地球化学特征分析

his study focuses on the Crescent Spring Area at the western end of the Hexi Corridor. Throughsample collection experiments, the research systematically analyzed hydrochemical characteristicsenvironmental isotopes, and hydrogeochemical processes within the study area. The results indicate thatmountain water, originating from atmospheric rainfall and glacial meltwater, is the primary source replenishingthe diving pool in the area, with a close causal link between the two. Additionally, the local area is affected by thefault structure or cross-flow and receives lateral replenishment from the deep underground runoff in front of theOiLian Mountains. The evaporation effect of groundwater in the DangHe irrigation area is weak, primarilydischarging through artificial mining. Other groundwater burial areas mainly discharge through evaporation andranspiration. The chemical composition of groundwater is influenced by the karst filtration involving carbonateand silicate. Key factors controlling groundwater salinity include the dissolution of rock salt, gypsum, and partiterocks, as well as the precipitation of calcite and dolomite, along with evaporation. Various degrees of mixingoccur during the water cycle in the basin. Overall, these research findings provide a scientific basis for theecological protection and restoration of Crescent Lake.