ABSTRACT
Hydraulic (flow/pressure) modelling of water distribution systems using computer based network models is now firmly established within the UK water industry, following first introduction upon the PC platforms from the late 1980s. Early implementations were focused upon strategic (trunk main) systems, capable of simplification in respect of pipe system complexity etc. Increase in computer power has more recently enabled the construction of all-mains models, extending into the streets supplying individual properties. Most UK Water Companies now possess models of their local distribution systems, down to the pipes comprising the individual District-MeteredAreas (DMA) used for local performance monitoring. The authors have discussed aspects of the network modelling and information system needs for holistic distribution management strategies in earlier articles [Burrows et al (1999, 2000), Crowder and Burrows (1998), Crowder (1999)], together with more recent contributions on pressure dependent demand [Tanyimboh et al (2001), Tabesh et al (2002), Hayuti (2002)].
