NUMERICAL MODELING OF A INTERMITENT WATER DISTRIBUTION SYSTEMS USING EPA SWMM 5

Código

I-FLUHIDROS0015

Autores

Jose Goes Vasconcelos, Luis Castaneda, Bruno Sousa, Susan Poudel, Gianlucca Nicolaico, Vitor Geller

Tema

Hidráulica aplicada a sistemas de drenagem e de saneamento

Resumo

Approximately one billion people are served by intermittent water systems (IWS), i.e., piped drinking water systems that cannot sustain pressurized flow conditions continuously. Various deleterious impacts to human health, such as diarrheal disabilities, have been attributed to external contamination that are admitted into these systems when pressures are low. Despite of the magnitude of the problem, there are relatively few studies that attempt to improve the hydraulic description of such systems. Most hydraulic solvers used to design and simulate drinking water systems assume that pressurized flow conditions exist at all times. However, ventilation may occur at points where atmospheric contact exists, violating the hypothesis of pressurized flows. An alternative is to use mixed flow models, which consider both free-surface and pressurized flow regimes in their formulation, such as EPA SWMM 5 model. While not originally conceived to represent drinking water systems, this work shows an application of this model to represent an IWS in Guatemala. The model approach was used to simulate the processes of filling, emptying and chlorine concentration. These results will be verified with data to be collected on-site, supporting future modeling practices recommendations for IWS.