Non-Uniformity of Water Demands in a Rural Water Supply System
 
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Department of Technology and Systems of Environmental Engineering, Faculty of Civil and Environmental Engineering, Bialystok University of Technology, ul. Wiejska 45A, 15-351 Białystok
CORRESPONDING AUTHOR
Joanna Gwoździej-Mazur   

Department of Technology and Systems of Environmental Engineering, Faculty of Civil and Environmental Engineering, Bialystok University of Technology, ul. Wiejska 45A, 15-351 Białystok, Poland
Publish date: 2019-09-01
 
J. Ecol. Eng. 2019; 20(8):245–251
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ABSTRACT
The increasingly frequent use of computer simulations for in calculations concerning water supply systems requires accounting for demand patterns. Determining coefficients of daily and hourly non-uniformity is indispensable for correct designing or modernization of pipes in the water supply network. The first goal of article was to obtain non-uniformity index for the preparation of hydraulic models in rural water systems called “N” system and “CWK” system. In this article, the authors present the results of water consumption analysis in two rural water supply systems. The article presents water consumption non-uniformity factors calculated over the course of a year, a month and a day. The article also included calculated water demand curves over the course of a day, showing the variability of water demand with characteristic morning and evening water consumption peaks and changes of the consumption curve in the prospective development of the water supply network, where industrial consumers would become the main water consumers.The research material consisted of water consumption measurements in two rural water supply networks taken during the years 2010-2017, situated in northeastern Poland. The article also shows water demand curves in the studied rural water supply networks for every day of the week. The values of minimum and maximum hourly non-uniformity coefficients were compared to the mean value of these coefficients. Changes in the values of minimum and maximum hourly coefficients with respect to the mean value for the given hour may differ from -89% to +85% for hours of minimum demand. Changes in the values of minimum and maximum hourly coefficients with respect to the mean value for the given hour may differ from -16% to +30% for hours of maximum demand.