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http://dx.doi.org/10.3741/JKWRA.2012.45.11.1131

Multiple Regression Equations for Estimating Water Supply Capacities of Dams Considering Influencing Factors  

Kang, Min Goo (Future Resources Institute)
Lee, Gwang Man (Korea Institute of Water and Environment, Korea Water Resources Corporation (Kwater))
Publication Information
Journal of Korea Water Resources Association / v.45, no.11, 2012 , pp. 1131-1141 More about this Journal
Abstract
In this study, factors that influence water supply capacities of dams are extracted using factor analysis, and multiple regression equations for estimating water supply capacities of dams are developed using the analysis results. Twenty-one multi-purpose dams and twelve Municipal and Industrial (M&I) water supply dams are selected for case studies, and eight variables influencing water supply capacities of dams, namely: watershed area, inflow, effective reservoir storage, grade on amount of M&I water supply, grade on amount of agricultural water supply, grade on amount of in-stream flow supply, grade on river administration, and grade on average rainfall, are determined. Two case studies for multi-purpose dams and M&I water supply dams are performed, employing factor analysis, respectively. For the two cases, preliminary tests, such as reviewing matrix of correlation coefficient, Bartlett's test of sphericity, and Kaiser-Meyer-Olkin (KMO) test, are conducted to evaluate the suitability of the variables for factor analysis. In case of multi-purpose dams, variables are grouped into three factors; M&I water supply dams, two factors. The factors are rotated using Varimax method, and then factor loading of each variable is computed. The results show that the variables influencing water supply capacities of dams are reasonably selected and appropriately grouped into factors. In addition, multiple regression equations for predicting the amounts of annual water supply of dams are established using the factor scores as explanatory variables, it is identified that the models' accuracies are high, and their applications to determining effective storage capacity of a dam during dam planning and design steps are presented. Consequently, it is thought that the variables and factors are useful for dam planning and dam design.
Keywords
factor analysis; water supply capacity; multiple regression equation; dam planning and design;
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Times Cited By KSCI : 6  (Citation Analysis)
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