TY - JOUR

T1 - A coupled approach for the three-dimensional simulation of pipe leakage in variably saturated soil

AU - Peche, Aaron

AU - Graf, Thomas

AU - Fuchs, Lothar

AU - Neuweiler, Insa

N1 - Funding information: We thank three anonymous reviewers for meaningful comments which have helped improve the quality of this manuscript. We also thank Peter Spönemann for guidance regarding the code coupling and for implementing the coupling to HYSTEM-EXTRAN. We further thank Robert Sämann, Arne Toewe and Yibo Zhu for technical support and discussion. The research is being conducted within the BMBF funded research project EVUS (EVUS – Real-Time Prediction of Pluvial Floods and Induced Water Contamination in Urban Areas) [BMBF, 03G0846A].

PY - 2017/10/26

Y1 - 2017/10/26

N2 - In urban water pipe networks, pipe leakage may lead to subsurface contamination or to reduced waste water treatment efficiency. The quantification of pipe leakage is challenging due to inaccessibility and unknown hydraulic properties of the soil. A novel physically-based model for three-dimensional numerical simulation of pipe leakage in variably saturated soil is presented. We describe the newly implemented coupling between the pipe flow simulator HYSTEM-EXTRAN and the groundwater flow simulator OpenGeoSys and its validation. We further describe a novel upscaling of leakage using transfer functions derived from numerical simulations. This upscaling enables the simulation of numerous pipe defects with the benefit of reduced computation times. Finally, we investigate the response of leakage to different time-dependent pipe flow events and conclude that larger pipe flow volume and duration lead to larger leakage while the peak position in time has a small effect on leakage.

AB - In urban water pipe networks, pipe leakage may lead to subsurface contamination or to reduced waste water treatment efficiency. The quantification of pipe leakage is challenging due to inaccessibility and unknown hydraulic properties of the soil. A novel physically-based model for three-dimensional numerical simulation of pipe leakage in variably saturated soil is presented. We describe the newly implemented coupling between the pipe flow simulator HYSTEM-EXTRAN and the groundwater flow simulator OpenGeoSys and its validation. We further describe a novel upscaling of leakage using transfer functions derived from numerical simulations. This upscaling enables the simulation of numerous pipe defects with the benefit of reduced computation times. Finally, we investigate the response of leakage to different time-dependent pipe flow events and conclude that larger pipe flow volume and duration lead to larger leakage while the peak position in time has a small effect on leakage.

KW - HYSTEM-EXTRAN

KW - Model coupling

KW - Numerical model

KW - OpenGeoSys

KW - Pipe leakage

UR - http://www.scopus.com/inward/record.url?scp=85032801024&partnerID=8YFLogxK

U2 - 10.1016/j.jhydrol.2017.10.050

DO - 10.1016/j.jhydrol.2017.10.050

M3 - Article

AN - SCOPUS:85032801024

VL - 555

SP - 569

EP - 585

JO - Journal of hydrology

JF - Journal of hydrology

SN - 0022-1694

ER -