Abstract
This research tracks the abnormal system operating conditions of the city of Asyut water supply network over an extended period. EPANET software was used to perform hydraulic and water quality analysis. Firstly, the effect of roughness variation with time on pressure head distribution and water quality through the network is simulated. Secondly, leakage due to failure of some pipes on the flow, pressure heads and water quality are investigated. Also the effect of closing some pipes in the network on pressure head and chlorine distributions is taken into consideration. Finally, the effect of changing the source of chlorine disinfection on water quality in the network is studied. The results indicate the following: (1) The increasing roughness of pipes can significantly increase the head losses through the network and consequently decrease the head at the end of network below the minimum limit. The variability in nodal pressures also has a significant effect on chlorine decay if the bulk wall reaction coefficient is taken to be dependent on the roughness of the pipe. (2) The failure of some pipes in the networks not only increases the consumed discharge in the network and decreases the pressure head but also changes the flow directions in some pipes through the network. (3) Closing a pipeline increases pressure in a region and decreases it at another and also changes the direction of flow in the network. This may affect the chlorine distribution through the network. (4) Chlorine disinfection from one source can significantly decrease the residual concentrations under the minimum limit in part of the network, while it can increase variability in nodal concentrations.
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References
Colebrook CF, White CM (1937) The reduction of carrying capacity of pipes with age. J Inst Civil Eng London 10: 99
Hudson WD (1966) Stuidies of distribution system capacity in seven cities. J AWWA 58(2): 157
Lamont PA (1981) Common pipe flow formulas compared with the theory of roughness. J AWWA 73(5): 274
Sharp WW, Walski TM (1988) Predicting internal roughness in water mains. J AWWA 80(11): 34–40
Greyvenstein B, Van Zyl JE (2005) An experimental investigation into the pressure leakage relationship of some failed water pipes. In: Proceeding of IWA special conference ‘Leakage2005’. Halifax, Canada
LeChevallier MW, Lowry CD, Lee RG (1990) Disinfecting biofilms in a model distribution system. J AWWA 82(7): 87–99
LeChevallier MW, Lowry CD, Lee RG, Gibbon DL (1993) Examining the relationship between iron corrosion and the disinfection of biofilm bacteria. J AWWA 85(7): 111–123
Herson DS, Marshall DR, Baker KH, Victorin HT (1991) Association of microorganisms with surfaces in distribution systems. J AWWA 83: 103–106
Clark RM, Grayman WM, Hess AF (1993) Modeling contaminant propagation in drinking-water distribution system. J Environ Eng ASCE 119(2): 349–364
Clark RM, Grayman WM, Goodrich JA, Deininger RA, Skou K (1994) Measuring and modelling chlorine propagation in water distribution system. J Water Resour Plan Manag ASCE 120(6): 871–879
Jowitt PW, Xu C (1993) Predicting pipe failure effects in water distribution networks. J Water Resour Plan Manag 119(1): 18–31
Ozdemir ON, Ucak A (2002) Simulation of chlorine decay in drinking-water distribution system. J Environ Eng 128(1): 31–39
Harding BL, Walski TM (2000) Long time-series simulation of water quality in distribution system. J Water Resour Plan Manag 126(4): 199–209
Rossman LA, Boulos PF, Altman T (1993) Discrete volume-element method for network water-quality models. J Water Resour Plan Manag 119(5): 505–517
Rossman LA (1994) EPANET users manual. Risk reduction engineering lab. US Environmental protection agency, Cincinnati
Rossman LA (2000) Computer models/ EPANET. In: Mays LW (ed) Water distribution systems handbook. McGraw-Hill, New York
Castro P, Neves M (2003) Chlorine decay in water distribution systems case study—Lousada network. Electron J Environ Agric Food Chem 2(2) (ISSN 1579–4377)
American Water Works Association (1989) AWWA Manual M32-Distribution network analysis for water utilities. Denver, Colo.: AWWA
Basiouny M, Al-Etriby HK (2000) Modelling residual free chlorine in drinking water distribution systems. Mansoura Eng J 25(1): C1–C13
Basiouny M, El-Atreby HK (2001) Analysis of water distribution network performance by penalty curve. Alexandria Eng J 40(2): 201–214
Ozdemir ON (2005) Success of booster chlorination for water supply networks with genetic algorithms. J Hydraul Res 43(3): 267–275
Clark RM, Rossman LA (1995) Modelling distribution system water quality: regulatory implications. J Water Resour Plan Manag ASCE 121(6): 423–428
Giustolisi O, Kapelan Z, Savic D (2008) Extended period simulation analysis considering valve shutdowns. J Water Res Plan Manag ASCE 134(6): 527–537
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Mohamed, H.I., Abozeid, G. Dynamic Simulation of Pressure Head and Chlorine Concentration in the City of Asyut Water Supply Network in Abnormal Operating Conditions. Arab J Sci Eng 36, 173–184 (2011). https://doi.org/10.1007/s13369-010-0027-3
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DOI: https://doi.org/10.1007/s13369-010-0027-3