Author(s): Rajesh Gupta; Sushma Dhapade; Pramod R. Bhave

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Abstract: The research work in the last two decades on reliability analysis of water distribution networks is primary focused on assessing the reliability from hydraulic point of view, i.e. supplying required quantity of water at desired pressure, using various qualitative and quantitative measures. In this paper, both quality and quantity of water is taken in to account to assess reliability of water distribution network using “Water Quality Reliability Factor”. Water quality reliability factor is defined as ratio of total quantity of desired quality of water supplied by the network to the total quantity of desired quality of water required to be supplied in the period of analysis. Pipe breaks and pump failure conditions are considered as random events. Hydraulic simulation of network under pressure deficient conditions arising due to pipe breaks, pump failure conditions is carried out using node flow analysis. EPANET is modified for hydraulic simulation using node flow analysis. The proposed methodology is illustrated with an example network taken from the literature. The “Water quality reliability factor” proposed herein has physical meaning and this single parameter takes in to account both quality and quantity of water available at different nodes of a water distribution network.

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Year: 2009