TY - JOUR

T1 - Stationary leakage from a gravity sewer into horizontal unsaturated-saturated soil

T2 - a numerical benchmark for the verification of pipe leakage models

AU - Peche, Aaron

AU - Graf, Thomas

N1 - Funding Information: We want to thank the editor for handling the manuscript and the anonymous reviewers for the thorough feedback which improved the quality of the manuscript significantly. This research was being conducted within the BMBF funded research project EVUS [BMBF, 03G0846A].

PY - 2021/3/5

Y1 - 2021/3/5

N2 - Pipe leakage from defect subsurface gravity sewer pipe networks potentially contaminates soil and groundwater. In recent times, an increasing number of numerical pipe leakage models incorporating pipe flow, saturated-unsaturated flow in the subsurface, and exchange fluxes from and to leaky pipes have been developed. Numerical benchmarks are required in order to demonstrate result accuracy of these models. The present technical note represents a novel numerical benchmark of the pipe leakage problem describing pipe water exfiltration into horizontal unsaturated-saturated soil. The present benchmark enables to test the accurate calculation of the spatial potential distribution in the soil, which is affected by the water level in the leaky pipe. The derivation of an analytical solution for stationary pipe water exfiltration into a horizontal aquifer and a conceptual model for the setup of a corresponding numerical model is shown. Results of the analytical model are reproduced using the numerical leakage model OGS-HE.

AB - Pipe leakage from defect subsurface gravity sewer pipe networks potentially contaminates soil and groundwater. In recent times, an increasing number of numerical pipe leakage models incorporating pipe flow, saturated-unsaturated flow in the subsurface, and exchange fluxes from and to leaky pipes have been developed. Numerical benchmarks are required in order to demonstrate result accuracy of these models. The present technical note represents a novel numerical benchmark of the pipe leakage problem describing pipe water exfiltration into horizontal unsaturated-saturated soil. The present benchmark enables to test the accurate calculation of the spatial potential distribution in the soil, which is affected by the water level in the leaky pipe. The derivation of an analytical solution for stationary pipe water exfiltration into a horizontal aquifer and a conceptual model for the setup of a corresponding numerical model is shown. Results of the analytical model are reproduced using the numerical leakage model OGS-HE.

KW - Numerical benchmark

KW - numerical model

KW - OpenGeoSys

KW - pipe leakage

UR - http://www.scopus.com/inward/record.url?scp=85107538273&partnerID=8YFLogxK

U2 - 10.1080/1573062X.2021.1893360

DO - 10.1080/1573062X.2021.1893360

M3 - Article

AN - SCOPUS:85107538273

VL - 18

SP - 479

EP - 484

JO - Urban water journal

JF - Urban water journal

SN - 1573-062X

IS - 6

ER -