Robust algorithm for head-dependent analysis of water distribution systems

Tiku Tanyimboh

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

7 Citations (Scopus)

Abstract

In a water distribution system (WDS), low pressure situations can arise for a variety of reasons. For example, over time, the demands may exceed the capacity of the WDS or some major components e.g. pumps and trunk mains may not be operational while repairs are carried out. The extent to which demands are satisfied in a WDS is governed by the actual amount of pressure in the system and pressure-deficient operating conditions are not uncommon. Despite this, the conventional modelling approach works well only under fully satisfactory pressure regimes, with results for subnormal pressure conditions often being inaccurate, misleading and even unreasonable. Sample results for a prototype FORTRAN computer program which can perform head-driven analysis using a globally convergent Newton-Raphson scheme are presented. Extensive testing has shown that the program is efficient and robust. It is demonstrated here that head-driven analysis is not computationally more time consuming than demand-driven analysis and that different functions for head-dependent nodal outflows can produce significantly different results.
LanguageEnglish
Title of host publicationWater Distribution Systems Analysis 2008
Pages1-11
Number of pages11
DOIs
Publication statusPublished - Aug 2008
EventWater Distribution Systems Analysis 2008 - Kruger National Park, South Africa
Duration: 17 Aug 200820 Aug 2008

Conference

ConferenceWater Distribution Systems Analysis 2008
CountrySouth Africa
CityKruger National Park
Period17/08/0820/08/08

Fingerprint

Water distribution systems
Computer program listings
Repair
Pumps
Testing

Keywords

  • water
  • distribution systems
  • WDS
  • pumps
  • trunk mains

Cite this

Tanyimboh, T. (2008). Robust algorithm for head-dependent analysis of water distribution systems. In Water Distribution Systems Analysis 2008 (pp. 1-11) https://doi.org/10.1061/41024(340)69
Tanyimboh, Tiku. / Robust algorithm for head-dependent analysis of water distribution systems. Water Distribution Systems Analysis 2008. 2008. pp. 1-11
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Tanyimboh, T 2008, Robust algorithm for head-dependent analysis of water distribution systems. in Water Distribution Systems Analysis 2008. pp. 1-11, Water Distribution Systems Analysis 2008, Kruger National Park, South Africa, 17/08/08. https://doi.org/10.1061/41024(340)69

Robust algorithm for head-dependent analysis of water distribution systems. / Tanyimboh, Tiku.

Water Distribution Systems Analysis 2008. 2008. p. 1-11.

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

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AB - In a water distribution system (WDS), low pressure situations can arise for a variety of reasons. For example, over time, the demands may exceed the capacity of the WDS or some major components e.g. pumps and trunk mains may not be operational while repairs are carried out. The extent to which demands are satisfied in a WDS is governed by the actual amount of pressure in the system and pressure-deficient operating conditions are not uncommon. Despite this, the conventional modelling approach works well only under fully satisfactory pressure regimes, with results for subnormal pressure conditions often being inaccurate, misleading and even unreasonable. Sample results for a prototype FORTRAN computer program which can perform head-driven analysis using a globally convergent Newton-Raphson scheme are presented. Extensive testing has shown that the program is efficient and robust. It is demonstrated here that head-driven analysis is not computationally more time consuming than demand-driven analysis and that different functions for head-dependent nodal outflows can produce significantly different results.

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Tanyimboh T. Robust algorithm for head-dependent analysis of water distribution systems. In Water Distribution Systems Analysis 2008. 2008. p. 1-11 https://doi.org/10.1061/41024(340)69