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Environmental Engineering Research 2010;15(3): 135-140. DOI: https://doi.org/10.4491/eer.2010.15.3.135
Water Demand Forecasting by Characteristics of City Using Principal Component and Cluster Analyses
Taeho Choi1, Oeun Kwon2, and Jayong Koo1
1Department of Environmental Engineering, University of Seoul, Seoul 130-743, Korea
2Korean Intellectual Property Office, Daejeon 302-701, Korea
Corresponding Author: Jayong Koo ,Tel: +82-2-2210-2946, Fax: +82-2-2244-2245, Email: jykoo@uos.ac.kr
Received: November 20, 2009;  Accepted: August 3, 2010.
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ABSTRACT
With the various urban characteristics of each city, the existing water demand prediction, which uses average liter per capita day, cannot be used to achieve an accurate prediction as it fails to consider several variables. Thus, this study considered social and industrial factors of 164 local cities, in addition to population and other directly influential factors, and used main substance and cluster analyses to develop a more efficient water demand prediction model that considers unique localities of each city. After clustering, a multiple regression model was developed that proved that the R2 value of the inclusive multiple regression model was 0.59; whereas, those of Clusters A and B were 0.62 and 0.74, respectively. Thus, the multiple regression model was considered more reasonable and valid than the inclusive multiple regression model. In summary, the water demand prediction model using principal component and cluster analyses as the standards to classify localities has a better modification coefficient than that of the inclusive multiple regression model, which does not consider localities.
Keywords: Cluster analysis | Multiple regression model | Principal component analysis | Water demand prediction
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