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TitleApplication of factorial analysis to the water quality in reservoirs
Author(s)Silva, Eliana Costa e
Lopes, Isabel Cristina
Correia, Aldina
Gonçalves, A. Manuela
KeywordsWater quality
Factor analysis
Chemical and environmental variables
Issue date5-Jun-2017
PublisherAIP Publishing
JournalAIP Conference Proceedings
Abstract(s)In this work we present a Factor Analysis of chemical and environmental variables of the water column and hydro-morphological features of several Portuguese reservoirs. The objective is to reduce the initial number of variables, keeping their common characteristics. Using the Factor Analysis, the environmental variables measured in the epilimnion and in the hypolimnion, together with the hydromorphological characteristics of the dams were reduced from 63 variables to only 13 factors, which explained a total of 83.348% of the variance in the original data. After performing rotation using the Varimax method, the relations between the factors and the original variables got clearer and more explainable, which provided a Factor Analysis model for these environmental variables using 13 varifactors: Water quality and distance to the source, Hypolimnion chemical composition, Sulfite-reducing bacteria and nutrients, Coliforms and faecal streptococci, Reservoir depth, Temperature, Location, among other factors.
TypeConference paper
Publisher version
AccessRestricted access (UMinho)
Appears in Collections:CMAT - Artigos em atas de conferências e capítulos de livros com arbitragem / Papers in proceedings of conferences and book chapters with peer review

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