Multivariate analysis of the water quality variation in the Serra da Estrela (Portugal) Natural Park as a consequence of road deicing with salt

The concentration of some anions (Cl, F, NO 3, and SO 4), cations (Na, K, Ca, and Mg), pH and conductivity was determined in seven sampling points in the Serra da Estrela Mountains (Portugal) to verify if the application of road deicing with salt provokes impact in the water quality. Multivariate ch...

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Bibliographic Details
Published in:Chemometrics and intelligent laboratory systems 2010-07, Vol.102 (2), p.130-135
Main Authors: Rodrigues, Pedro M.S.M., Rodrigues, Ricardo M.M., Costa, Bruno H.F., Tavares Martins, António A.L., Esteves da Silva, Joaquim C.G.
Format: Article
Language:English
Subjects:
Cluster analysis
Deicing salt
Factor analysis
Multivariate analysis
Water quality
Water salinization
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Summary:The concentration of some anions (Cl, F, NO 3, and SO 4), cations (Na, K, Ca, and Mg), pH and conductivity was determined in seven sampling points in the Serra da Estrela Mountains (Portugal) to verify if the application of road deicing with salt provokes impact in the water quality. Multivariate chemometric data analysis techniques of clustering and factor analysis were used. Preliminary analysis shows an overall conductivity increase in late spring and a decrease in late summer. A strong association between sodium chloride and the conductivity was observed by cluster analysis. Factor analysis supports the previous results and shows that the variation of the concentration of sodium chloride is the main source of the variance of the data along the year. In conclusion, the spreading of salt during the winter creates a local and seasonal impact on the water quality.
ISSN:0169-7439
1873-3239
DOI:10.1016/j.chemolab.2010.04.014