Comparison of demand driven and pressure dependent hydraulic approaches for modelling water quality in distribution networks

Alemtsehay Gebremeskel Seyoum, Tiku Tanyimboh, Calvin Siew

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

1 Citation (Scopus)
483 Downloads (Pure)


Water distribution hydraulic models have been used as a basis for water quality modelling in distribution networks. Experts recognized that a realistic hydraulic model is required to accurately simulate water quality. The aim of this paper is to compare Demand Driven Analysis (DDA) and Pressure Dependent Analysis (PDA) based hydraulic models for simulating water quality in networks for future enhancement of water quality models. The well known EPANET 2 and the newly developed EPANET-PDX (pressure dependent extension) have been used as the DDA and PDA models respectively. Water quality analysis was performed for normal and pressure deficient hydraulic conditions on a sample network from literature. The models provide identical results for normal pressure conditions, but different results for pressure deficient conditions. The differences for the case of pressure deficient condition are significant at the farthest nodes from the source during high pressure deficiency situation with low demand satisfaction condition.
Original languageEnglish
Title of host publicationEleventh International Conference on Computing and Control for the Water Industry : CCWI 2011
Subtitle of host publication Urban Water Management: Challenges and Opportunities: Exeter, UK, 5-7 September 2011
EditorsDragan A Savic, Zoran Kapelan, David Butler
Number of pages6
Publication statusPublished - Sep 2011
Event11th International Conference on Computing and Control for the Water Industry - Exeter, United Kingdom
Duration: 5 Sep 20117 Sep 2011


Conference11th International Conference on Computing and Control for the Water Industry
Country/TerritoryUnited Kingdom


  • demand driven analysis
  • EPANET 2
  • water quality modelling
  • water distribution network
  • pressure-deficient water network
  • gradient method
  • logistic pressure-dependent nodal flow function
  • pressure driven analysis

Cite this