Journal of Water Resource and Protection

Volume 11, Issue 1 (January 2019)

ISSN Print: 1945-3094   ISSN Online: 1945-3108

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Variable Chlorine Decay Rate Modeling of the Matsapha Town Water Network Using EPANET Program

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DOI: 10.4236/jwarp.2019.111003    721 Downloads   1,182 Views   Citations


A variable chlorine decay rate modeling of the Matsapha town water network was developed based on initial chlorine dosages. The model was adequately described by a second order rate function of the chlorine decay rate with respect to the initial chlorine dose applied. Simulations of chlorine residuals within the Matsapha water distribution network were run using the EPANET 2.0 program at different initial chlorine dosages and using the variable decay rate as described by the second order model. The measurement results indicated that the use of constant decay rate tended to underestimate chlorine residuals leading to potentially excess dosages with the associated chemical cost and side effects. The error between the two rate models varied between 0% and 15%. It is suggested that the use of water quality simulation programs such as EPANET be enhanced through the extension programs that accommodate variable rate modeling of chlorine residuals within distribution systems.

Cite this paper

Tiruneh, A. , Debessai, T. , Bwembya, G. , Nkambule, S. and Zwane, L. (2019) Variable Chlorine Decay Rate Modeling of the Matsapha Town Water Network Using EPANET Program. Journal of Water Resource and Protection, 11, 37-52. doi: 10.4236/jwarp.2019.111003.

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