Author(s): M. Tabesh; V. Arefkhani; H. Tavakoli Far
Linked Author(s):
Keywords: Water distribution network; Hydraulic modeling; Demand-drivenanalysis (DDA); Head-driven analysis (HDA); Gradient method; Leakage
Abstract: In this study a hydraulic simulation model is developed for head-driven analysis (HDA) of WDNs. A head discharge relationship is used to display the pressure dependency of demand and gradient method is applied for solving the network hydraulic equations. Some modifications are made on basic gradient method to consider nodal pressure instead of its head. On the other hand, another relationship is used for leakage term. To calibrate the model for leakage calculations, minimum night flow (MNF) values obtained from DMA measurement are used and leakage is distributed throughout the network with direct relation with pressure. A software is developed based on the proposed methodology. It can read the network structure through an EPANET input file and is able to consider components of the network. Some benchmark WDNs are tested using the developed software. The results show the model capability for designing and operational management of water distribution networks.
Year: 2009