Hydrochemical characteristics of shallow groundwater in a chemical industry agglomeration area of Yantai City
To investigate thehydrochemical characteristics of shallow groundwater in a chemical industrial agglomeration area in Yantai City,this study collected 12 sets of groundwater samples and one set of surface water samples from the study area and its surrounding areas.It analyzed the hydrochemical characteristics ofgroundwater by integrating various methods like mathematical statistics,Piper and Gibbsdiagrams,correlation analysis,the ion ratio method,and principal component analysis.Moreover,it explored the impacts of pro-duction activities in thestudy area on the groundwater environment.The results show that:(1)The shallow groundwater in the study ar-ea was neutral to slightly alkaline,with the primary hydrochemical type being the SO4-Ca·Na type,followed by the SO4·HCO3-Ca·Mg,HCO3·SO4-Ca·Na,SO4·HCO3·Cl-Ca·Na,SO4·Cl-Ca,SO4·HCO3-Ca,and SO4-Na types;(2)The chemical composi-tion of shallow groundwater originated principally from the combined effects of evaporite and silicate dissolution;(3)Chemical enter-prises contributed significantly to groundwater contamination.A nearercontamination source is associated with higher ion concentra-tions,suggesting more severe groundwater contamination.Along the groundwater flow direction,contaminants in upper reaches are prone to migrate and accumulate toward lower reaches,aggravating groundwater contamination in lower reaches.
shallow groundwaterhydrochemical characteristicschemical industry agglomeration areacorrelation
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