Identification of influencing factors for groundwater quality variation using multivariate analysis |
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Authors: | Srinivasa Rao Yammani T V K Reddy M R K Reddy |
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Institution: | (1) Department of Geology, Sri Venkateswara University, Tirupati, 517 502, AP, India;(2) Department of Geoinformatics, Yogi Vemana University, Kadapa, AP, India |
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Abstract: | This paper reports the results of multivariate analysis on the major-ions data present in groundwater collected in a hydrogeochemical
survey of a hard rock terrain in Andhra Pradesh, India. The use of factor analysis is proposed, as a first step, for identifying
the processes influencing the hydrogeochemical variations in groundwater. As a result of the application factor analysis,
three factors were obtained, which explained characterization of groundwater quality and identified the sources for the presence
of ions and its variations in concentrations and their geochemical processes. The natural dissolution of existing rocks of
granites and granitic gneisses is the common influencing source for its hydrogeochemical character in the study area, but
at some localized zones, the human-influenced sources of agricultural, industrial and urbanization are the dominating factors.
The spatial and seasonal variation of the hydrogeochemical processes associated with the factor variables in the groundwater
quality of the study area were analysed and evaluated. |
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Keywords: | Groundwater quality Hydrogeochemistry Factor analysis Natural dissolution Anthropogenic sources Pollution |
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