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“Computational Civil Engineering 2005”, International Symposium 291Fig. 4. Legend: blue line – chlorine concentration in node 2 (the same as fig.2) at which isadded a supplementary injection in node 2 of 0.2 mg/L,Figure 5. Legend: blue line – network without failure; black line – network with failure onpipeline (1-2) and supplementary chlorine injection in node 2.
292Em. Bârsan, A. Ignat4. CONCLUSIONS1. The maintaining of water quality in distribution network is realized bypreserving in the whole network some residual chlorine concentrations forecast inLaw 458/2002.2. At a normal functioning, the necessary chlorine in network is assured byperiodical injections in the existing booster disinfection stations, established forthis state.3. In the case of some failures (pipe breaking etc) the residual chlorine distributionit is perturbed.4. With a personal program it is made evident the chlorine evolution in nodes of adistribution network for cases: network without the failures and network with thefailures on pipelines and the necessity to have the stand-by boster stations forchlorine injections in the cases of failures.5. The procedure may be applied for the elimination of pipelines, excepting thecases when appear the isolated nodes (situation that affects the graph connexion).References1. Goldman,F.E., Burcu Altann Sakaria, A.,Orsmbee, L.E., Uber,J.G., Mays L.W., Optimizationmodels for operations, Chap 16 from Water Distribution Systems Handbook, McGraw-Hill,New York, 2000.2. Bârsan,Em., Ignat, C., Evolution of Chlorine Concentration in Water Distribution Networks.,International Symposium “Computational Civil Engineering”, Editors. C. Ionescu, F.Păuleţ-Crăiniceanu,H. Bărbat, Ed Soc.Acad. Matei-Teiu Botez, Iaşi, 2003, 112-119,3. Bârsan,Em., Ignat,C., Development of a Existed Water Supply Network, Proceedings of VIIInternational Symposium on Water Management and Hydraulic Engineering, 10-12.09 .2001,Gdansk (Miedzybrodzie zywieckie), Poland, 397 - 4044. Bocelli, D.L., Tryby M.E., Uber J.G., Rossman L.A., Zierolf M.L., Polycarpu M.M., OptimalScheduling of Booster Disinfection in Water Distribution Systems, Journal of WaterResources Planning and Management, March/April, 1998, 99-111.5. Mukherjee, S., Laha, Sh., Genetic Algorithm to optimize disinfectant Booster Location, 1stWorld Water Congress of the International Water Association (IWA) Conference PreprintBook 2, Drinking Water Treatment, Paris, 2000, 411- 417
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