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Water Resources Management

, Volume 33, Issue 3, pp 1167–1183 | Cite as

Leakage Estimation in Water Distribution Network: Effect of the Shape and Size Cracks

  • Mauro De MarchisEmail author
  • Barbara Milici
Article
  • 116 Downloads

Abstract

The definition of the relationship between the leak outflow, the total head at the leak and other relevant parameters such as pipe stiffness, leak dimension and shape has been object of extensive studies. The attention to a correct estimation of leakages, leak law, is crucial for the management of water distribution systems. Water utilities, in fact, can reduce leakage levels through the leak detection or more usually by pressure management. In the last cases, the known of the relationship between leak discharge and pressure is fundamental. In recent decades, the use of the Torricelli equation has been questioned, because some experimental results showed that it can yield unsatisfactory results, and other formulations have been suggested to model water leakages in water distribution networks. To investigate the effectiveness of the formulations suggested by different authors, an experimental campaign was carried out at the Environmental Hydraulic Laboratory of the University of Enna (Italy) for leaks of different shape and size in polyethylene pipes. The results of the laboratory experiments contribute to clarify the applicability of the leak law for circular and rectangular leaks and suggest that Torricelli formulation is valid in absence of leak area deformation. Furthermore, the analysis contributes to the knowledge of the coefficients of the leak laws used to estimate the leakage outflow.

Keywords

Water distribution network Leakages Water losses Emitter law 

Notes

Compliance with Ethical Standards

Conflict of interests

None

References

  1. Al-Ghamd A (2011) Leakage-pressure relationship and leakage detection in intermittent water distribution systems. J Water Supply: Res Technol - Aqua 60 (3):178–183CrossRefGoogle Scholar
  2. Brunone B, Ferrante M (2004) Pressure wave as a tool for leak detection in closed conduits. Urban Water J 1(2):145–155CrossRefGoogle Scholar
  3. Cassa AM, Zyl JE (2014) Predicting the leakage exponents of elastically deforming cracks in pipes. J Hydr Eng 140(2):182–189CrossRefGoogle Scholar
  4. Cassa AM, Van Zyl JE, Laubscher R (2010) A numerical investigation into the effect of pressure on holes and cracks in water supply pipes. Urban Water J 7(2):109–120CrossRefGoogle Scholar
  5. De Marchis M, Fontanazza M, Freni G, Notaro V, Puleo V (2016) Experimental evidence of leaks in elastic pipes. Water Res Manag 30(6):2005–2019CrossRefGoogle Scholar
  6. Farley M, Trow S (2003) Losses in water distribution networks: a practioner’s guide to assessment monitoring and control. IWA Publishing, LondonGoogle Scholar
  7. Ferrante M (2012) Experimental investigation of the effects of pipe material on the leak head-discharge relationship. J Hydr Eng 138(8):736–743CrossRefGoogle Scholar
  8. Ferrante M, Massari C, Brunone B, Meniconi S (2011) Experimental evidence of hysteresis in the head-discharge relationship for a leak in a polyethylene pipe. J Hydr Eng 137(7):775–780CrossRefGoogle Scholar
  9. Ferrante M, Massari C, Brunone B, Meniconi S (2013) Leak behaviour in pressurized pvc pipes. Water Sci Technol Water Supply 13(4):987–992CrossRefGoogle Scholar
  10. Ferrante M, Meniconi S, Brunone B (2014) Local and global leak laws. Water Res Manag 28(11):3761–3782CrossRefGoogle Scholar
  11. Ferrante M, Meniconi S, Brunone B, Karney BW, Massari C (2014) Leak size, detectability and test conditions in pressurized pipe systems. Water ResManag 28(13):4583–4598Google Scholar
  12. Greyvenstein B, van Zyl J (2007) An experimental investigation into the pressure - leakage relationship of some failed water pipes. J Water Supply Res 56(2):117–124CrossRefGoogle Scholar
  13. Massari C, Ferrante M, Brunone B, Meniconi S (2012) Is the leak head-discharge relationship in polyethylene pipes a objective function? J Hydr Res IAHR 50(4):409–417CrossRefGoogle Scholar
  14. May J (1994) Pressure dependent leakage. World water environmental engineeringGoogle Scholar
  15. Meniconi S, Brunone B, Ferrante M, Massari C (2011) Small amplitude sharp pressure waves to diagnose pipe systems. Water Res Manag 25(1):79–96CrossRefGoogle Scholar
  16. Schwaller J, van Zyl JE (2015) Modeling the pressure-leakage response of water distribution systems based on individual leak behavior. J Hydr Eng 141(5):1–8.  https://doi.org/10.1061/(ASCE)HY.1943-7900.0000984 CrossRefGoogle Scholar
  17. Thornton J (2002) Water loss control manual. McGraw-Hill, New YorkGoogle Scholar
  18. Thornton J (2003) Managing leakage by managing pressure: a practical approach. Water 21, IWA Water Loss Task ForceGoogle Scholar
  19. Thornton J, Lambert A (2005) Progress in practical prediction of pressure: leakage, pressure: burst frequency and pressure: consumption relationships. In: Proc. IWA Leakage 2005 Conference, Halifax (Canada). International Water Association, London, pp 1–11Google Scholar
  20. Van Zyl J, Cassa A (2014) Modeling elastically deforming leaks in water distribution pipes. J Hydr Eng 140(2):182–189CrossRefGoogle Scholar
  21. Van Zyl J, Clayton C (2007) The effect of pressure on leakage in water distribution systems. Proc Institut Civil Eng Water Manag 160(2):109–114CrossRefGoogle Scholar
  22. Walski T, Bezts W, Posluszny E, Weir M, Whitman B (2006) Modeling leakage reduction: through pressure control. J Am Water Works Assoc 98(4):147–155CrossRefGoogle Scholar
  23. Walski T, Whitman B, Baron M, Gerlof F (2009) Understanding the pressure versus flow relationship for pipe leaks. In: Proceedings of 2009 DSS Distribution system symposiumGoogle Scholar

Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Faculty of Engineering and ArchitectureUniversity of Enna KoreEnnaItaly

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