Abstract
Water security is considered as one of the critical subjects that can arise from different issues, for instance, the injection of a poisonous pollutant into the drinking water system of a city followed by a terrorist attack. If the network lacks optimal operation to provide security against this threat, the whole population of the city can be affected by such an incident. This study aimed at preparing the optimal emergency response protocols by multi-objective particle swarm optimization (MOPSO). Furthermore, it calculates the risk of contaminants entering the network. The problem consists of three main objectives: 1) minimizing the number of operational interventions, 2) minimizing the number of polluted nodes, and 3) minimizing the number of exposed individuals. The location of closed valves and opened hydrants was chosen as decision variables. The proposed method is demonstrated using a benchmark and a real network.
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