Investigation into the pressure-driven extension of the EPANET hydraulic simulation model for water distribution systems

Alemtsehay G. Seyoum, Tiku T. Tanyimboh

Research output: Contribution to journalArticle

8 Citations (Scopus)
153 Downloads (Pure)

Abstract

Several hydraulic modelling approaches have been proposed previously to simulate pressure deficient operating conditions in water distribution networks more realistically. EPANET-PDX is an extension of EPANET 2 that has an embedded logistic nodal head-flow function. The EPANET-PDX algorithm was investigated to address the weaknesses uncovered under conditions of extremely low pressure. It was observed that, under certain circumstances, the norm of the system of equations increased from one iteration to the next. A criterion that detects false convergence was included. In general, in the examples considered, the formulation proposed had more consistent computational properties, required fewer iterations of the global gradient algorithm, and application of the line minimization procedure was frequent. The formulation proposed is significantly faster in conditions of extremely low pressure. The hydraulic and water quality modelling functionality of EPANET 2 was preserved. For the operating conditions with satisfactory pressure, where direct comparisons with EPANET 2 were possible, EPANET 2 was consistently faster.
Original languageEnglish
Number of pages17
JournalWater Resources Management
Early online date29 Sep 2016
DOIs
Publication statusE-pub ahead of print - 29 Sep 2016

Keywords

  • Nodal head-flow function
  • water distribution network
  • line minimization
  • evolutionary optimization
  • global gradient algorithm
  • pressure-driven analysis

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