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Design of looped water distribution networks using a heuristic approach

Ateş, Halil İbrahim
This study aims to design pipe diameters of a water distribution network using a heuristic approach algorithm. The heuristic approach algorithm aims to maximize the reliability of the network while minimizing the total cost of the water distribution network, which is a multi-objective optimization problem. In a water distribution network, the resilience index is defined as network reliability (Todini, 2000). The cost of the water distribution network is the total cost of the network pipes. In this heuristic approach, the minimum required pressure limit, water flow velocity upper limit and reliability index are considered. In this study, the heuristic approach algorithm developed by Todini (2000) is coded as a computer software by the integration of hydraulic network solution software (EPANET) calculate engine and C#. A case study is performed in a DMA of N8.3 pressure zone of Ankara network. In this study, the effect of the change in resilience index on Yayla network pipe diameters is surveyed. As a result, it is observed that network reliability can be increased by 7%, increasing the network cost by only 3.5%. The resilience index value of the current Yayla District network is 0.95 and it can be said that existing Yayla District network is overdesigned.