Hydrogeochemical Processes Affecting Groundwater Chemistry in the Central Part of the Guanzhong Basin, China.
Arch Environ Contam Toxicol
; 80(1): 74-91, 2021 Jan.
Article
in En
| MEDLINE
| ID: mdl-33146757
ABSTRACT
Groundwater is essential for the sustainable development of the Guanzhong Basin, China, and its quality is mainly controlled by hydrogeochemical processes and anthropogenic pollution. This study used statistical and multivariate statistical analysis approaches to recognize the hydrogeochemical processes and affecting factors of groundwater in the central part of the Guanzhong Basin. Correlations among 14 hydrochemical parameters were statistically examined. Principal component analysis (PCA), factor analysis (FA), and hierarchical cluster analysis (HCA) techniques were applied to analyze the physicochemical variables to understand the affecting factors of groundwater quality in the study area. The correlation analysis results indicate that cation exchange is the dominant process affecting the concentration of Na+ and Ca2+ in the groundwater. Both the PCA and FA indicate that minerals dissolution/precipitation and human activities are the key factors that affect groundwater quality. All parameters except CO32- and pH increase from C1 to C4 obtained through the Q mode HCA. C4 has a hydrochemical type of SO4-Na·K, indicating that the sample of this cluster is primarily influenced by anthropogenic processes.
Full text:
1
Database:
MEDLINE
Main subject:
Water Pollutants, Chemical
/
Water Supply
/
Groundwater
/
Water Quality
/
Environmental Monitoring
Limits:
Humans
Country/Region as subject:
Asia
Language:
En
Journal:
Arch Environ Contam Toxicol
Year:
2021
Type:
Article
Affiliation country:
China