IMPACT OF TRANSITIONFLOW REGIME ON CONTAMINANTS PROPAGATIONIN PRESSURISED PIPES

In recent years, the scientific community has focused a lot of attention on the problem of water quality within the distribution networks in order to prevent and identify any presence of contaminants that might insist within it. In literature, several numerical models are available able to identify, position, represent and simulate the propagation of contamination in pressurized pipe networks. Unfortunately, these models adopt simplified approaches that do not lead to significant errors when ...

Optimal water quality sensor positioning in urban drainage systems for illicit intrusion identification

Bayesian Identification of Brackish Water Infiltration by Lagrangian Sensors

In the water sector, the problem of polluting source identification was mainly investigated regarding pressurized distribution networks respect to sewers systems as a drinking water contamination event determines an immediate alarm for public health, however, when an polluting discharge occurs in the sewer, various problems arise; in facts, the quality of wastewater acts both on the proper functioning of the sewer system, on the wastewater treatment plant (WWTP) and on the receiving water bod...

Analysis of diffusion and dispersion processes in water distribution networks through the use of the Péclet number threshold

To model the water quality within the distribution networks, simplified models are used (such as EPANET), which use an advective-reactive approach and neglect relevant phenomena, such as diffusion and dispersion, for low values of the Reynolds number. Although valid in the presence of a purely turbulent flow regime, as they do not produce substantial modelling errors, these simplifications are not applicable equally to all distribution networks. Therefore, the present study defines a threshol...