Abstract: “Reliability of Water Distribution Networks (WDNs) is one of the most important issues in planning and management of these networks. In the previous studies various indices have been proposed to evaluate the reliability of WDNs. These indices which have some advantages and disadvantages can also be an indicator for efficiency of WDNs. Since the Pressure Dependent Analysis (PDA) of WDNs has more accurate results than the Demand Dependent Analysis (DDA), then in this study a new index is proposed for reliability assessment of WDNs based on PDA. According to this index, the nodal pressures and the nodal available demands are the most factors influencing the reliability of WDNs. A sample network is also used to compare the new proposed index and the available indices and their efficiencies in assessing the reliability of WDNs”

Keywords: Water distribution network, Reliability, Pressure dependent analysis