Physical investigation into the significance of ground conditions on dynamic leakage behaviour by Sam Fox, Richard Collins, and Joby Boxall J Water Supply Res Tec Volume 65(2): March 24, 2016 ©2016 by IWA Publishing

Three fundamental governing principles for characterising the behaviour of dynamic leaks. Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

CFD simulation results for leak into water, from a 60 × 1 mm longitudinal slit leaking into a fully submerged test section box. Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

CFD simulation results for leak into porous media representative of gravel, from a 60 × 1 mm longitudinal slit leaking into a fully submerged test section box. Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

Laboratory facility at the University of Sheffield. Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

Leak flow-rate through a 60 × 1 mm longitudinal slit at three discrete pressure heads into water (dotted line) and geotexile fabric (solid line). Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

Axial strain measured parallel to a 60 × 1 mm longitudinal slit in MDPE pipe at three discrete pressure heads for test cases into water (dotted line) and geotextile fabric (solid line). Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

Time series of evaluated discharge coefficients for 60 × 1 mm longitudinal slit in MDPE pipe at three discrete pressure heads for test cases into water (dotted line) and geotextile fabric (solid line). Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

Axial strain (change of strain) for a 60 × 1 mm longitudinal slit in MDPE pipe at 26 m pressure head for test cases into water (dotted line), geotextile fabric (solid black line) and mixed gravel (light grey line). Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing

Leakage flow rate for a 60 × 1 mm longitudinal slit in MDPE pipe at 25 m pressure head for test cases into water (dotted line), geotextile fabric (solid black line) and mixed gravel (light grey line). Sam Fox et al. J Water Supply Res Tec 2016;65: ©2016 by IWA Publishing