[Hydrochemical Characteristics and Water Quality Evaluation of Groundwater in the Hualiangting Reservoir Basin of Taihu County].

• DOI: 10.13227/j.hjkx.202402136
• Publication Date: 2025-02-08
• Authors: Hai Liu; Jian-Min Huang; Yang Song; Guo‐Hong Zhao; Xudong Wang; Wei Wei

This study focused on the Hualiangting Reservoir Basin in Taihu County, where 42 well water samples and 20 spring were collected to measure primary hydrochemical indicators. Using a comprehensive suite of methods including mathematical statistics, Piper diagrams, Gibbs ion ratios, factor analysis, examined characteristics influencing factors within area. Water quality was assessed based entropy-weighted index （EWQI）, potential risks associated with nitrate （NO3-） levels groundwater evaluated using health risk assessment model （HHRA）. The results indicated that generally weakly alkaline, sodium （Na+）, calcium （Ca2+）, bicarbonate （HCO3-） being predominant ions. type mainly characterized as bicarbonate-sodium-calcium type. formation wells primarily influenced by rock weathering cation exchange adsorption. main sources Ca2+, magnesium （Mg2+）, HCO3- carbonate dissolution, while agricultural activities domestic sewage discharge led increased concentrations Na+, chloride （Cl-）, NO3-. Overall, area good, ranging from fair excellent. demonstrated low non-carcinogenic for men, women, children, children facing significantly higher compared adults. findings this provide valuable guidance sustainable development, utilization, protection resources Basin.