Practical application of the head dependent gradient method for water distribution networks

Calvin Siew, Tiku Tanyimboh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Critical pressure-deficient operating conditions frequently occur in water distribution networks. Head driven analysis (HDA) of water distribution networks allows for the pressure-dependent nature of nodal flows and, therefore, yields the actual nodal flows and heads for both normal and subnormal pressure conditions. Hence, HDA simulation models are more practical than demand driven analysis models that assume that all demands are satisfied in full even under pressure-deficient conditions. This paper describes an approach in which a new pressure-dependent demand function that has no discontinuities has been incorporated in the Gradient Method. The procedure has been tested extensively and demonstrated to be capable of effectively simulating both normal and pressure-deficient operating conditions. The algorithm's convergence is smooth and rapid thanks to a line search and backtracking procedure that ensures progress towards the solution in each iteration. The results presented herein would appear to confirm that the proposed method is robust and efficient. Results for a real network are also included.
Original languageEnglish
Pages (from-to)444-450
Number of pages7
JournalWater Science and Technology: Water Supply
Volume11
Issue number4
DOIs
Publication statusPublished - 2011

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water
distribution
method
discontinuity
simulation
demand
analysis

Keywords

  • demand-driven analysis
  • head-dependent modelling
  • head-flow relationship
  • pressure-deficient water distribution system
  • pressure-dependent demand

Cite this

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Practical application of the head dependent gradient method for water distribution networks. / Siew, Calvin; Tanyimboh, Tiku.

In: Water Science and Technology: Water Supply, Vol. 11, No. 4, 2011, p. 444-450.

Research output: Contribution to journalArticle

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AU - Siew, Calvin

AU - Tanyimboh, Tiku

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