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JSIR Vol.68(07) [July 2009] >


Title: Identification of effluent quality indicators for use in irrigation– A factor analysis approach
Authors: Das, Madhumita
Keywords: Effluent quality
Factor analysis
Factor analysis
Irrigation
Issue Date: Jul-2009
Publisher: CSIR
Abstract: Present paper determines effluent quality indicators for periodical monitoring of effluent usage in irrigation. Effluentquality factors (groupings) and effluent attributes are identified using principal component analysis on 23 chemical attributesrepresenting 20 different industrial units. Using discriminant analysis, salt type (variance, 20%), salt stress (variance, 17.8%),heavy metal impact and potassium effect were identified as most critical factors. Further analysis of individual attributes withinthese factors evaluated discriminating attributes those best served as effluent quality indicators in the order of Pb > Cd >>TDS(total dissolved solids) > Mg ≅ Cl- ≅ EC ≅ Na > Fe ≅ SAR (sodium adsorption ratio) > Cr ≅ pH. Variance analysis identified Pb,Cd, Mg and Cr as first priority indicators followed by TDS, Na, SAR, Fe and pH as secondary indicators to assess effluentquality for use in irrigation.
Page(s): 634-639
ISSN: 0022-4456
Source:JSIR Vol.68(07) [July 2009]

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