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Analysis of Non-Iterative Methods and Proposal of a New One for Pressure-Driven Snapshot Simulations with EPANET

Author

Listed:
  • E. Pacchin

    (Università degli Studi di Ferrara)

  • S. Alvisi

    (Università degli Studi di Ferrara)

  • M. Franchini

    (Università degli Studi di Ferrara)

Abstract

This paper compares different recently proposed methods for pressure-driven snapshot simulations of water distribution networks using the EPANET software interface and proposes a new one. The proposed method is based on the insertion of a sequence of devices consisting of a General Purpose Valve (GPV), a fictitious junction, a reach with a check valve and a reservoir at each water demand node. The proposed method differs from other methods previously proposed in the literature – and similarly based on the insertion of sequences of devices consisting of a valve and a reservoir or emitter – in that it uses a GPV; more specifically, for this valve the user can fix the relationship between outflow discharge (or the flow delivered to users) and the available pressure head at the node, thus allowing for a flexible representation of the relationship between these two parameters, whereas with the other methods this relationship remains fixed, based on the structure of the sequence of devices used. Practical applications to three different real-life cases show the unreliability and limits, in terms of accuracy, of some of the methods previously proposed in the literature. They also show, by contrast, the validity of the new method, which has proven to be reliable and accurate, as well as flexible, since it enables any relationship to be defined between the delivered flow and available head.

Suggested Citation

  • E. Pacchin & S. Alvisi & M. Franchini, 2017. "Analysis of Non-Iterative Methods and Proposal of a New One for Pressure-Driven Snapshot Simulations with EPANET," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(1), pages 75-91, January.
    • Handle: RePEc:spr:waterr:v:31:y:2017:i:1:d:10.1007_s11269-016-1511-7
    DOI: 10.1007/s11269-016-1511-7
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    References listed on IDEAS

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    1. Carlo Ciaponi & Luigi Franchioli & Enrico Murari & Sergio Papiri, 2015. "Procedure for Defining a Pressure-Outflow Relationship Regarding Indoor Demands in Pressure-Driven Analysis of Water Distribution Networks," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(3), pages 817-832, February.
    2. Enrico Creaco & Marco Franchini & Stefano Alvisi, 2010. "Optimal Placement of Isolation Valves in Water Distribution Systems Based on Valve Cost and Weighted Average Demand Shortfall," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(15), pages 4317-4338, December.
    3. Mohd Abdy Sayyed & Rajesh Gupta & Tiku Tanyimboh, 2015. "Noniterative Application of EPANET for Pressure Dependent Modelling Of Water Distribution Systems," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(9), pages 3227-3242, July.
    4. P. Sivakumar & R. Prasad, 2014. "Simulation of Water Distribution Network under Pressure-Deficient Condition," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(10), pages 3271-3290, August.
    5. E. Creaco & M. Franchini & S. Alvisi, 2012. "Evaluating Water Demand Shortfalls in Segment Analysis," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(8), pages 2301-2321, June.
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