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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/8897
Title: Allocation of weights using factor analysis for development of a novel water quality index
Authors: Tripathi M.
Singal, Sunil Kumar
Published in: Ecotoxicology and Environmental Safety
Abstract: Water quality assessment and monitoring is one of the most important aspects for ensuring a good environmental health. A Water Quality Index (WQI) is one of the most frequently used tools for assessing overall quality of water resources. This study uses Factor Analysis (FA) for one of the most significant steps in WQI development – weight determination. Factor analysis has been applied to the water quality parameters shortlisted from Principal Component Analysis in the study area and it grouped the parameters into different sets of loadings. Each loading contained a group of parameters contributing to the overall variance addressed by that loading. Weights were allocated to each loading as well as to individual parameters within each loading. For final aggregation, a hybrid method was followed; where weighted harmonic means were estimated for the parameters within each loading and weighted arithmetic mean was estimated from the results of harmonic mean. The use of multivariate statistical technique reduces the subjectivity in the development of the final WQI and makes the current study a useful step in future for the development of a Ganga Water Quality Index (GWQI). In addition to this, the developed methodology can also be used for developing WQI for any water body depending on the availability of historical data. © 2019 Elsevier Inc.
Citation: Ecotoxicology and Environmental Safety (2019), 183(): -
URI: https://doi.org/10.1016/j.ecoenv.2019.109510
http://repository.iitr.ac.in/handle/123456789/8897
Issue Date: 2019
Publisher: Academic Press
Keywords: Factor analysis
Ganga
Parameters
Water quality index
Weights
ISSN: 1476513
Author Scopus IDs: 57203898328
15766150400
Author Affiliations: Tripathi, M., Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Singal, S.K., Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247
Corresponding Author: Tripathi, M.; Department of Hydro and Renewable Energy, Indian Institute of Technology RoorkeeIndia; email: mtrippah@iitr.ac.in
Appears in Collections:Journal Publications [HRE]

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