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Physical investigation into the significance of ground conditions on dynamic leakage behaviour

Sam Fox, Richard Collins, Joby Boxall
Available Online 18 January 2016, jws2015079; DOI: 10.2166/aqua.2015.079
Sam Fox
Department of Civil and Structural Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK E-mail: sam.fox@sheffield.ac.uk
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Richard Collins
Department of Civil and Structural Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK E-mail: sam.fox@sheffield.ac.uk
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Joby Boxall
Department of Civil and Structural Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK E-mail: sam.fox@sheffield.ac.uk
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Abstract

Effective leakage models are crucial for leakage assessment and control strategies to improve the sustainability of vital water distribution, and other pipeline, infrastructure. This paper evaluates the interdependence of leak hydraulics, structural dynamics and soil hydraulics, particularly considering the significance of the soil conditions external to longitudinal slits in viscoelastic pipe. Initial numerical exploration and unique physical experimental results are presented exploring this complex physical phenomenon. The existence of an idealised fully restrained porous medium was shown to significantly increase the pressure and time dependent leak opening area whilst reducing the leak flow-rate, compared to a leak into water only. The research highlights the limitation of existing dynamic leakage modelling approaches which greatly simplify or neglect the influence of the soil conditions. Incorporation of this understanding into leakage modelling will enable more accurate estimation of leakage rates and hence the effects of management and control strategies.

  • leakage
  • leakage modelling
  • porous media
  • structural dynamics
  • First received 9 June 2015.
  • Accepted in revised form 10 October 2015.
  • © 2016 The Authors

This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/).

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Journal of Water Supply: Research and Technology - Aqua: 67 (2)
  Volume 67,issue 2

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Physical investigation into the significance of ground conditions on dynamic leakage behaviour
Sam Fox, Richard Collins, Joby Boxall
Journal of Water Supply: Research and Technology - Aqua Jan 2016, jws2015079; DOI: 10.2166/aqua.2015.079
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Physical investigation into the significance of ground conditions on dynamic leakage behaviour
Sam Fox, Richard Collins, Joby Boxall
Journal of Water Supply: Research and Technology - Aqua Jan 2016, jws2015079; DOI: 10.2166/aqua.2015.079

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Keywords

leakage
leakage modelling
porous media
structural dynamics
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