Identification of controlling processes of groundwater quality in a developing urban area using principal component analysis

摘要: Hydrogeochemistry is an important tool for the evaluation of effect human activities on aquifer system. Sixty eight groundwater samples were collected from bore wells during pre- and post-monsoon Nagpur , a fast growing city in India, to assess spatial controlling processes contamination using principal component analysis (PCA). Groundwater has variable total dissolved solid (TDS) hardness (TH) values classifying them fresh saline moderately hard very types. About 36 33 % post-monsoon, respectively, are not suitable drinking purpose. The graphical presentation chemistry indicated Ca–HCO3, mixed Ca–Na–HCO3 Ca–Mg–Cl PCA summarizes chemical variables pH, EC, TDS, TH, TA, Na+, K+, Ca2+, Mg2+, HCO3 −, Cl−, SO4 2− NO3 − into two PC loadings, accounting 61.33 62.09 % variance respectively. first shows high loadings Ca2+ which considered as pollution-controlled anthropogenic sources. Second Na+ taken alkalinity geogenic sources, scores suggest causes variation chemistry. Negative chloro-alkaline indices prevalence reverse ion exchange irrespective season, silicate weathering over quality further PCA. Thus, helps quality.