Noniterative application of EPANET for pressure dependent modelling of water distribution systems

Mohd Abbas H. Abdy Sayyed, Rajesh Gupta, Tiku Tanyimboh

Research output: Contribution to journalArticle

28 Citations (Scopus)
131 Downloads (Pure)

Abstract

EPANET 2 has been used previously to simulate pressure-deficient operating conditions in water distribution systems by: (a) executing the algorithm repetitively until convergence is achieved; (b) modifying the source code to cater for pressure-dependent outflows; or (c) incorporating artificial elements e.g. reservoirs in the data input file. This paper describes a modelling approach that enables operating conditions with insufficient pressure to be simulated in a single execution of EPANET 2 without modifying the source code. This is achieved by connecting a check valve, a flow control valve and an emitter to the demand nodes. Thus the modelling approach proposed enhances an earlier formulation by obviating the need for an artificial reservoir at the nodes with insufficient pressure. Consequently the connecting pipe for the artificial reservoir (for which additional data must be provided) is not required. Also, we removed a previous limitation in the modelling of pressure-dependent nodal flows to better reflect the performance of the nodes with insufficient flow and pressure. This yields improved estimates of the available nodal flow and is achieved by simulating pressure-deficient nodal flows with emitters. The emitter discharge equation enables the nodal head-flow relationship to be varied to reflect the characteristics of any network. The procedure lends itself to extended period simulation, especially when carried out with the EPANET toolkit. The merits of the methodology are illustrated on several networks from the literature one of which has 2465 pipes. The results suggest the procedure is robust, reliable and fast enough for regular use.
Original languageEnglish
Pages (from-to)3227–3242
Number of pages15
JournalWater Resources Management
Volume29
Issue number9
Early online date16 Apr 2015
DOIs
Publication statusPublished - 1 Jul 2015

Fingerprint

Water Distribution Systems
Water distribution systems
Dependent
Modeling
modeling
pipe
Vertex of a graph
Pipe
flow control
Flow Control
water distribution system
Flow control
outflow
methodology
Methodology
Formulation

Keywords

  • water supply
  • EPANET
  • pressure dependent outflows
  • pressure dependent modelling
  • flow control valve
  • extended period simulation
  • pressure dependent nodal flow function
  • dynamic hydraulic simulation algorithm
  • pressure deficient water distribution system

Cite this

Abdy Sayyed, Mohd Abbas H. ; Gupta, Rajesh ; Tanyimboh, Tiku. / Noniterative application of EPANET for pressure dependent modelling of water distribution systems. In: Water Resources Management. 2015 ; Vol. 29, No. 9. pp. 3227–3242.
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Noniterative application of EPANET for pressure dependent modelling of water distribution systems. / Abdy Sayyed, Mohd Abbas H. ; Gupta, Rajesh; Tanyimboh, Tiku.

In: Water Resources Management, Vol. 29, No. 9, 01.07.2015, p. 3227–3242.

Research output: Contribution to journalArticle

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