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http://dx.doi.org/10.3741/JKWRA.2009.42.4.343

Estimation of Water Quality Improvement Benefit Using Replacement Cost Approach  

Yeo, Kyu-Dong (Dept. of Civ. Engrg., Inha Univ.)
Yi, Choong-Sung (Inst. of Water Resources System, Inha Univ.)
Kim, Gil-Ho (Dept. of Civ. Engrg., Inha Univ.)
Shim, Myung-Pil (Dept. of Civ. Engrg., Inha Univ.)
Publication Information
Journal of Korea Water Resources Association / v.42, no.4, 2009 , pp. 343-353 More about this Journal
Abstract
The objective of this study is to evaluate the effect of the water quality improvement by water discharge through dams and to provide a benefit estimation methodology, taking domestic situation into consideration, by the replacement cost approach analyzed with a sewage treatment plant instead of an alternative dam. To this end, facility that alternates a dam must have same functions of the discharged water from the dam and the two facilities must be able to be compared objectively. To estimate the benefit, estimation methodology of alternative facility's cost is established and criteria of cost.benefit analysis that are duration period and ratio of large scale repairing expense was presented. As a case study, the water quality improvement benefit of Song-Li-Won dam was evaluated, which is planned to be built on Nae-Sung stream in Nak-Dong River system. The results of applying this methodology to Song-Li-Won dam are 644,006 million won of the annual average discharge and 1,351,526 million won of maximum discharge. The usage of the framework in this study is expected for estimation of water quality improvement benefit in case water quality improvement project is performed.
Keywords
Replacement cost approach; Water quality improvement; Alternative facility; Benefits;
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