Alternative ways of classifying river water quality using chemometric methods

Low, K.L. and Zain, S.M. (2005) Alternative ways of classifying river water quality using chemometric methods. Malaysian Journal of Analytical Sciences, 9 (1). pp. 116-125. ISSN 1394-2506

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Official URL: http://myais.fsktm.um.edu.my/3061/

Abstract

Variables used by DOE to calculate the water quality index (WQI) in classifying rivers are the chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammoniacal nitrogen (AN), suspended solid (SS), dissolved oxygen (DO) and pH (PH). In this work, we focus on the use of principal component analysis (PCA) and multiple linear regression (MLR) as an alternative classification method. 2D PCA results do not exhibit clear linearly separable classes but 3D plot incorporating PC3 results in better clustering. The clusters still overlap but classification can be made though rather contentious. MLR on the other hand is seen to be able to predict the WQI reasonably well.

Item Type: Article
Additional Information: Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Water quality index, Rivers, hydrology
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Miss Malisa Diana
Date Deposited: 23 Apr 2013 01:09
Last Modified: 23 Apr 2013 01:09
URI: http://eprints.um.edu.my/id/eprint/5880

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