为揭示准格尔煤田地区地下水循环特征，运用水化学技术、水汽轨迹模型和环境同位素等方法分析不同水体水化学特征、环境同位素特征、大气降水主要来源、地表水及地下水转化关系。结果表明：地表水矿化度低，呈弱碱-偏碱性，水化学类型以HCO3?SO4?Cl-Ca型水为主；地下水整体矿化度低，偏弱碱性，主要以HCO3-Na?Ca型、Cl-Na型、HCO3-Ca?Mg型、HCO3?Cl-Na型水为主；黄河水δD平均值为-79.6‰、δ18O平均值为-10.47‰，第四系地下水δD平均值为-66.25‰、δ18O平均值为-9.1‰，白垩系地下水δD值为-70.6‰、δ18O值为-9.3‰，石炭-二叠系地下水δD平均值为-77.07‰、δ18O平均值为-9.9‰，寒武-奥陶系地下水δD平均值为-75.73‰、δ18O平均值为-10.06‰；大气降水受极地气团和季风影响，主要来源为西风带水汽、地表水和地下水水汽蒸发再循环；断层带、褶皱轴部裂隙带为不同含水层间主要导水通道，大气降水和黄河为地下水主要补给来源；高承压水头寒武-奥陶系岩溶裂隙水越流补给第四系松散孔隙水和砂岩裂隙水，第四系松散孔隙水通过地层间不整合接触面裂隙发育带向下补给石炭-二叠系砂岩裂隙水，黄河水对寒武-奥陶系地下水的补给比例受地质构造发育的影响较大。

In order to reveal the characteristics of groundwater circulation in the Jungar coalfield area, water chemistry techniques, the HYSPLIT model and environmental isotopes were used to analyze the water chemistry characteristics of different water bodies, environmental isotope characteristics, the main sources of atmospheric precipitation, and surface water and groundwater transformation relationships. The results show that: (1) surface water has low mineralization, which is weakly alkaline to slightly alkaline. The water chemistry type is mainly HCO3?SO4?Cl-Ca water, the overall mineralization of groundwater is low and weakly alkaline, the water chemistry type are mainly HCO3-Na?Ca type, Cl-Na type, HCO3-Ca?Mg type and HCO3?Cl-Na type water. (2) The average value of δD of Yellow River water is -79.6‰, and the average value of δ18O is -10.47‰. the average value of δD of Quaternary groundwater is -66.25‰, and the average value of δ18O is -9.1‰. The δD value of Cretaceous groundwater is -70.6‰ and δ18O value is -9.3‰. the average value of δD of Carboniferous-Permian groundwater is -77.07‰, and the average value of δ18O is -9.9‰. The average value of δD of Cambrian Ordovician groundwater is -75.73‰ and the average value of δ18O is -10.06‰. Atmospheric precipitation is influenced by polar air masses and monsoons, and the main sources are westerly belt water vapor, surface water and groundwater vapor evaporation recirculation. (3) Fault zones and fracture zones of fold axis are the main channel of water conduction between different aquifers. Atmospheric precipitation and Yellow River are the main sources of groundwater recharge. The high pressurized head of Cambrian Ordovician karst fracture water crosses the flow to recharge the Quaternary Period pore water and sandstone fracture water. Quaternary pore water recharges the Carboniferous-Permian sandstone fracture water downward through the fracture development zone of the unconformity contact between strata. The recharge ratio of the Yellow River to the Cambrian Ordovician groundwater is influenced by the development of geological structures.

P641.3

国家重点研发计划重点专项课题水灾应急决策支持专家系统(2017YFC0804108)