地下水
含水层
地质学
风化作用
水文学(农业)
构造盆地
石膏
地球化学
环境同位素
地下水补给
地球科学
环境科学
地貌学
古生物学
岩土工程
作者
Sheng Qu,Limin Duan,Hairu Mao,Chenyu Wang,Xiangyang Liang,Ankun Luo,Lei Huang,Ruihong Yu,Ping Miao,Yuanzhen Zhao
标识
DOI:10.1016/j.scitotenv.2022.161377
摘要
The origin and evolution of groundwater in the Urangulan River basin area under growing concern as its situated in an economically and ecologically crucial area of China. In the present study, a combination of different methods (i.e. self-organizing maps (SOM), piper diagrams, ionic ratios, multiple isotopic analyses and Bayesian isotope mixing model) provided an efficient way for analysing groundwater origin and evolution. The hydrochemical type was found to be Ca-HCO3 in low TDS and Na + K-Cl or Na + K-SO4 in high TDS groundwater. According to the δ2H and δ18Owater values, groundwater in the study area mainly originated from atmospheric precipitation and was influenced by evaporation. In addition, the rock weathering in conjunction with the cation exchange completely dominated the geochemical evolution process. The dual SO42− isotope and Bayesian isotope mixing model showed that gypsum dissolution, fertilizer input and sewage input were the main sources of SO42− in the study area, accounting for an average of 30.2 %, 28.5 %, and 17.3 % of SO42− in the groundwater, respectively. Other than water-rock interactions, human activity (mining and irrigation) distributed throughout the study area in combination with the spatial characteristics was the dominant factor controlling the hydrochemical evolution. The results of this study provided a basis for understanding groundwater origin and evolution while facilitating the effective management and utilization of groundwater.
科研通智能强力驱动
Strongly Powered by AbleSci AI