ABSTRACT
The present work involves determination of the age of water at various nodes of the network under steady-state hydraulic conditions. Steady-state hydraulic analysis is carried out using EPANET Toolkit (Rossman 1999). These hydraulic results are then used to solve a steady-state water quality model. The values of age of water at various nodes, obtained from the solution of the water quality model, are then used to derive a representative water quality measure for the network. Minimization of a water quality measure is taken as the objective with the settings of isolation valves as decision variables and minimum allowable pressures at nodes as constraints. The model is applied to an example network.
