Groundwater flow and hydrogeochemical evolution in the Jianghan Plain, central China

摘要: Hydrogeochemical analysis and multivariate statistics were applied to identify flow patterns major processes controlling the hydrogeochemistry of groundwater in Jianghan Plain, which is located central Yangtze River Basin (central China) characterized by intensive surface-water/groundwater interaction. Although HCO3-Ca-(Mg) type water predominated study area, 457 (21 surface 436 groundwater) samples effectively classified into five clusters hierarchical cluster analysis. The hydrochemical variations among these governed three factors from factor Major components (e.g., Ca, Mg HCO3) originated carbonate silicate weathering (factor 1). Redox conditions 2) influenced geogenic Fe As contamination shallow confined groundwater. Anthropogenic activities 3) primarily caused high levels Cl SO4 phreatic Furthermore, score 1 aquifer gradually increased along paths. This demonstrates that enhanced information on hydrochemistry complex systems, statistical methods, improves understanding hydrogeochemical evolution due natural anthropogenic impacts.