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A Comparative Study on a Hydraulic and Water-Quality Analysis Method for Determining Rechlorination Injection Points for a Water-Supply Network

1
School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea
2
Research Center for Disaster Prevention Science and Technology, Korea University, Seoul 02841, Korea
3
Department of Civil Engineering, The University of Suwon, Gyeonggi-do 18323, Korea
*
Author to whom correspondence should be addressed.
Water 2019, 11(4), 697; https://doi.org/10.3390/w11040697
Received: 22 February 2019 / Revised: 21 March 2019 / Accepted: 2 April 2019 / Published: 4 April 2019
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Abstract

Water supply facilities are vulnerable to extreme weather events, such as droughts and floods. To establish a sustainable solution that resists accidents and disasters, a distributed system is required. To supply high-quality tap water using the existing water-supply network, rechlorination facilities must be installed to secure residual chlorine at the pipe end. In this study, a process is developed to determine the injection points and dosages of rechlorination using the latest pressure-driven analysis. The method was compared to the results of demand driven analysis methods. The proposed model was applied to P City in Korea to draw results. A detailed evaluation was performed to study how water pressure head and demand-based hydraulic and water quality analysis results impact the injection points and dosages of rechlorination. Thus, the existing demand-based model shows significant spatial deviations in the pressure head in the presence of water pressure drops, which subsequently lead to over-estimation of chlorine injection dosages for maintaining the concentration of residual chlorine. However, the proposed model involves a numerically validated theory and draws more reasonable results for hydraulic, water quality, and rechlorination dosages. The proposed model can be used as a decision-making tool based on hydraulic analysis for the supply of water of a stable quality. View Full-Text
Keywords: water supply network; hydraulic analysis; water quality analysis; pressure-driven analysis; rechlorination facility; residual chlorine water supply network; hydraulic analysis; water quality analysis; pressure-driven analysis; rechlorination facility; residual chlorine
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Lee, S.M.; Lee, H.M.; Yoo, D.G.; Kim, J.H. A Comparative Study on a Hydraulic and Water-Quality Analysis Method for Determining Rechlorination Injection Points for a Water-Supply Network. Water 2019, 11, 697.

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