R. Burrows - , University of Liverpool
M. Tabesh - Civil Engineering, University of Tehran

Up to now most of the existing water supply network analyses have been based on demand-driven simulation models. These models assume that nodal outflows are fixed and are always available. However, this method of simulation neglects the pressure-dependent nature of demand that is characterized by changes in actual nodal outflows particularly during critical events like major mechanical or hydraulic failures including local excessive demands. A novel approach is presented herein for head-driven simulation of water distribution networks. The methodology is based on the Newton-Raphson method and incorporates, directly, the relationship between nodal outflows and pressures. Through several examples, the applicability and advantages of this new formulation are demonstrated including accuracy and computational efficiency.

Water Supply Networks, Head, Driven Simulation, demand, pressure, Outflow Relationship, Newton, Raphson Method