Influence of system parameters on the disinfection capability of water distribution networks /

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2014

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Koç, Selin

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Adequate municipal water supply for people, is one of the most important signs of civilization. When water is cleaned from unhealthy compounds, the most important point for consumers is completed. Chlorine is used as the most common disinfectant. Some basic parameters which affect water quality are roughness coefficient, wall decay coefficient and bulk decay coefficient; amount of leakage is also effective. Efficiency of the network and water quality are influenced by changing these parameters in a water distribution network since the system behaviour changes. This study is prepared for the north part of Ankara Water Distribution Network, which is named N8.3. This area is mainly divided into 6 different DMA’s (District Metered Areas). Chlorine is used as employed as the disinfectant by Ankara General Directorate of Water and Sewerage (ASKI) for all regions. The network is analysed for DMA’s condition in which all isolation valves are closed and no water transition occurs between subzones. Because of the mixing process of water while studying whole network, a DMA’s based model can perform better than a complex system. The main aim of this study is to examine the effects of some system parameters and amount of leakage on disinfectant concentrations. In the districts that have no water exchange from the tank, roughness coefficient is not effective on chlorine concentrations. Wall decay and bulk decay coefficients are the main parameters affecting it. However, in the districts that have water exchange with the tank, the higher the roughness coefficient the lower the chlorine concentrations. Another important point is that, increasing leakage amount increases and decreasing leakage amount decreases the chlorine concentrations.

Subject Keywords

Water-supply., Water quality., Water, Water, Water

URI

http://etd.lib.metu.edu.tr/upload/12618066/index.pdf
https://hdl.handle.net/11511/24099

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

S. Koç, “Influence of system parameters on the disinfection capability of water distribution networks /,” M.S. - Master of Science, Middle East Technical University, 2014.