The investigation of the correlation between groundwater and surface water in terms of water origin and transformation is crucial for comprehending hydrological processes . Focuses on the Wulagai river and Xiliugou river basin located in East and West Inner Mongolia. It employs hydrochemical analysis and stable HO isotopes techniques to investigate the hydrochemical properties of the basin and quantitatively assess the interconversion between groundwater and surface water. The results suggest that the Xiliugou and Wulagai river basins were originally nourished by atmospheric precipitation, with lower δD and δ¹⁸O values in groundwater compared to surface water, attributed to factors such as evaporation, water vapor source, altitude, and latitude. The surface waters in the Xiliugou and Wulagai River exhibit dominance of Na•Ca-SO₄•HCO₃ and Ca•Na-HCO₃ types, respectively, while the groundwater is characterized by dominance of Na•Ca-HCO₃ and Ca•Mg-HCO₃ types, respectively. The water chemistry of surface water and groundwater in the two basins is influenced by water-rock interactions and processes of evaporation and concentration, primarily observed in the dissolution of carbonate rocks and evaporites. Hydrograph separation using End-Members Mixing Analysis (EMMA) revealed that during the growing season, groundwater in Xiliugou was primarily recharged by precipitation (76.87 %) and surface water (23.13 %), while in Wulagai, groundwater was mainly recharged by precipitation (65 %) and surface water (35 %). The presence of comparable hydrochemical constituents and shared regulatory mechanisms between groundwater and surface water within a given basin provides further evidence of a discernible hydraulic interconnection, primarily driven by the replenishment of groundwater through surface water recharge.

研究地下水和地表水在水的来源和转化方面的相关性对于理解水文过程至关重要。重点关注内蒙古东西部的乌拉盖河流域和西流沟河流域。它采用水化学分析和稳定H2O同位素技术来研究流域的水化学性质并定量评估地下水与地表水之间的相互转化。结果表明，溪柳沟流域和乌拉盖流域本来就受到大气降水的滋养，地下水的δD和δ ¹⁸ O值低于地表水，这与蒸发、水汽来源、海拔和纬度等因素有关。西柳沟和乌拉盖河地表水分别以Na•Ca-SO ₄ ·HCO ₃和Ca•Na-HCO ₃类型为主，地下水以Na•Ca-HCO ₃和Ca•Mg类型为主-HCO分别有₃种。两个盆地地表水和地下水的水化学受到水-岩石相互作用以及蒸发和浓缩过程的影响，主要在碳酸盐岩和蒸发岩的溶解过程中观察到。通过端元混合分析 (EMMA) 水位线分离发现，在生长季，西柳沟地下水主要由降水补给 (76.87 %) 和地表水 (23.13 %)，而乌拉盖地下水主要由降水补给 (65 %)。 %）和地表水（35%）。给定流域内地下水和地表水之间存在可比较的水化学成分和共同的调节机制，进一步证明了可辨别的水力互连，这主要是由通过地表水补给补充地下水所驱动的。