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December 20, 2016
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December 20, 2016
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December 20, 2016
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Abstract

Water is an essential resource for all the organisms, plants and animals including human beings. It is the backbone for the agricultural and industrial sectors and all the small business units. Increase in human population and economic activities have tremendously increased the demand for large-scale suppliers of freshwater for various competing end users.


The quality evaluation of water is represented in terms of physical, chemical and biological parameters. A particular problem in the case of water quality monitoring is the complexity associated with analyzing a large number of measured variables. The data sets contain rich information about the behaviour of the water resources. Multivariate statistical approaches allow deriving hidden information from the data sets about the possible influences of the environment on water quality. Classification, modelling and interpretation of monitored data are the most important steps in the assessment of water quality.


The application of different multivariate statistical techniques, such as cluster analysis (CA), principal component analysis (PCA) and factor analysis (FA) help to identify important components or factors accounting for most of the variances of a system.


In the present study water samples were analyzed for various physicochemical analyses by different methods following the standards of APHA, BIS and WHO and were subjected to further statistical analysis viz. the cluster analysis to understand the similarity and differences among the various sampling stations.  Three clusters were found. Cluster 1 was marked with 3 sampling locations 1, 3 & 5; Cluster-2 was marked with sampling location-2 and cluster-3 was marked with sampling location-4. Principal component analysis/factor analysis is a pattern reorganization technique which is used to assess the correlation between the observations in terms of different factors which are not observable.


Observations correlated either positively or negatively, are likely to be affected by the same factors while the observations which are not correlated are influenced by different factors. In our study, three factors explained 99.827% of variances. F1 marked  51.619% of total variances, high positive strong loading with TSS, TS, Temp, TDS, phosphate and moderate with electrical conductivity with loading values of 0.986, 0.970, 0.792, 0.744, 0.695,  0.701, respectively. Factor 2 marked 27.236% of the total variance with moderate positive loading with total alkalinity & temp. with loading values 0.723 & 0.606 respectively.


It also explained the moderate negative loading with conductivity, TDS, and chloride with loading values -0.698, -0.690, -0.582. Factor F 3 marked 20.972 % of the variances with positive loading with pH, chloride, and phosphate with strong loading of pH 0.872 and moderate positive loading with chloride and phosphate with loading values 0.721, and 0.569 respectively. 

Keywords

Water Physico-chemical Environ-metric methods Cluster Analysis FA/PCA.

Article Details

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Authors retain the copyright without restrictions for their published content in this journal. GCTL is a Sherpa Romeo Journal. 

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How to Cite
Chaurasia, G. L., Gupta, M. K., & Tandon, P. K. (2016). EVALUATION AND MODELLING OF GROUND WATER QUALITY DATA OF ALLAHABAD CITY BY ENVIRONMETRIC METHODS. Green Chemistry & Technology Letters, 2(4), 211–218. https://doi.org/10.18510/gctl.2016.248
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