Assessing major factors impacts on the hydrogeochemistry in a riverside alluvial aquifer, northeast China
- PDF / 6,773,238 Bytes
- 15 Pages / 595.276 x 790.866 pts Page_size
- 104 Downloads / 160 Views
ORIGINAL PAPER
Assessing major factors impacts on the hydrogeochemistry in a riverside alluvial aquifer, northeast China Li Wang 1 & Tao Du 2,3 & Qing Hu 4 & Sijie Lin 4 & Mingzhu Liu 1 & Honghan Chen 1 Received: 8 November 2019 / Accepted: 22 September 2020 # Saudi Society for Geosciences 2020
Abstract The 18 main physicochemical parameters were analyzed in 8 surface water samples and 67 groundwater samples from a typical riverside alluvial aquifer (RAA), which is the main water source in northeast China and is mainly characterized by nitrogen pollution. By integrating hydrochemical methods and multivariate statistical methods (hierarchical cluster analysis (HCA), principal component analysis (PCA), and factor analysis (FA)), the hydrogeochemistry of this RAA was investigated in the present study to reveal the spatial characteristics of groundwater chemistry and estimate the major controlling factors and their contribution to the spatial variations of groundwater chemistry. The results indicated that the groundwater chemistry had high spatial variability in the study area and was characterized by exceeding concentrations of nitrogen, Fe, and Mn. According to the dominant chemical composition, the HCA classified these samples into four chemically distinct groups (groups 1–4). The groundwater quality deteriorated from group 1 to group 4, which was induced by anthropogenic pollution (agricultural activities and polluted river water) and diverse hydrogeochemical processes. PCA and FA were used to evaluate and verify the contribution of these processes to groundwater chemistry. Four factors that explained 76.52% of the total variance of these distinct groups were identified: (1) Cl− and/or SO42− salt input, mineral dissolution, and industrial and domestic sewage discharges; (2) nitrate generation processes; (3) the original geological environment based on water-rock interaction; (4) ammonia input from industrial and domestic sewage, and agricultural fertilizers. The results of the present study provide a valuable scientific basis for better understanding the characteristics of groundwater hydrochemical and hydrogeochemical processes, and it can be considered as a reference that contributes to the management of RAAs and relevant policy-making for similar regions. Keywords Alluvial aquifer . Groundwater chemistry . Anthropogenic pollution . Nitrate generation processes . Water . rock interactions
Introduction Responsible Editor: Broder J. Merkel * Mingzhu Liu [email protected] 1
Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China
2
Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
3
University of Chinese Academy of Sciences, Beijing 100049, China
4
School of Environmental Science & Engineering, Southern University of Science & Technology, Shenzhen 518055, China
Groundwater is recognized as a primary so
Data Loading...
