Details
| Original language | English |
|---|---|
| Pages (from-to) | 778-793 |
| Number of pages | 16 |
| Journal | Journal of hydrology |
| Volume | 573 |
| Early online date | 2 Apr 2019 |
| Publication status | Published - Jun 2019 |
Abstract
In urban stormwater pipe networks, pipe leakage may lead to reduction of groundwater recharge, to significant reduction of groundwater levels, and to subsurface contamination. In the present study, stormwater pipe leakage is simulated in a case study representing an urban catchment using the coupled groundwater-pipe network flow model OGS-HE. This model includes pipe flow, variably saturated subsurface flow and exchange fluxes to and from leaky pipes. The study area is a typical northern German urban catchment with a stormwater pipe network which is located partly below and above groundwater. The successful calibration of a groundwater model is shown. Based on the calibrated groundwater model, stormwater pipe leakage for pipe networks of different ages and different pipe defect sizes is investigated for dry-weather flow conditions and rainfall conditions. It is shown that standard defects with a size of 10-4 m2 per m pipe can result in a groundwater infiltration into the leaky pipe network, which is in the order of annual groundwater recharge. The same standard defect size leads to a reduction of local groundwater levels by several meters. Rain events of increasing return period reduce groundwater infiltration into leaky pipes and increase stormwater exfiltration from leaky pipes, while the temporal distribution of a rain event has no effect on stormwater leakage.
Keywords
- Catchment scale, HYSTEM-EXTRAN, OpenGeoSys, Stormwater pipe leakage, Urban groundwater
ASJC Scopus subject areas
- Environmental Science(all)
- Water Science and Technology
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In: Journal of hydrology, Vol. 573, 06.2019, p. 778-793.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Physically based modeling of stormwater pipe leakage in an urban catchment
AU - Peche, Aaron
AU - Graf, Thomas
AU - Fuchs, Lothar
AU - Neuweiler, Insa
N1 - Funding information: We want to thank the associate editor and the three anonymous reviewers for investing the time to give a thorough and productive feedback. The feedback helped inprove the manuscript significantly. We thank Bora Shehu for providing precipitation data, and Yibo Zhu, Robert Sämann and Simon Berkhahn for 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 - 2019/6
Y1 - 2019/6
N2 - In urban stormwater pipe networks, pipe leakage may lead to reduction of groundwater recharge, to significant reduction of groundwater levels, and to subsurface contamination. In the present study, stormwater pipe leakage is simulated in a case study representing an urban catchment using the coupled groundwater-pipe network flow model OGS-HE. This model includes pipe flow, variably saturated subsurface flow and exchange fluxes to and from leaky pipes. The study area is a typical northern German urban catchment with a stormwater pipe network which is located partly below and above groundwater. The successful calibration of a groundwater model is shown. Based on the calibrated groundwater model, stormwater pipe leakage for pipe networks of different ages and different pipe defect sizes is investigated for dry-weather flow conditions and rainfall conditions. It is shown that standard defects with a size of 10-4 m2 per m pipe can result in a groundwater infiltration into the leaky pipe network, which is in the order of annual groundwater recharge. The same standard defect size leads to a reduction of local groundwater levels by several meters. Rain events of increasing return period reduce groundwater infiltration into leaky pipes and increase stormwater exfiltration from leaky pipes, while the temporal distribution of a rain event has no effect on stormwater leakage.
AB - In urban stormwater pipe networks, pipe leakage may lead to reduction of groundwater recharge, to significant reduction of groundwater levels, and to subsurface contamination. In the present study, stormwater pipe leakage is simulated in a case study representing an urban catchment using the coupled groundwater-pipe network flow model OGS-HE. This model includes pipe flow, variably saturated subsurface flow and exchange fluxes to and from leaky pipes. The study area is a typical northern German urban catchment with a stormwater pipe network which is located partly below and above groundwater. The successful calibration of a groundwater model is shown. Based on the calibrated groundwater model, stormwater pipe leakage for pipe networks of different ages and different pipe defect sizes is investigated for dry-weather flow conditions and rainfall conditions. It is shown that standard defects with a size of 10-4 m2 per m pipe can result in a groundwater infiltration into the leaky pipe network, which is in the order of annual groundwater recharge. The same standard defect size leads to a reduction of local groundwater levels by several meters. Rain events of increasing return period reduce groundwater infiltration into leaky pipes and increase stormwater exfiltration from leaky pipes, while the temporal distribution of a rain event has no effect on stormwater leakage.
KW - Catchment scale
KW - HYSTEM-EXTRAN
KW - OpenGeoSys
KW - Stormwater pipe leakage
KW - Urban groundwater
UR - http://www.scopus.com/inward/record.url?scp=85063979552&partnerID=8YFLogxK
U2 - 10.1016/j.jhydrol.2019.03.016
DO - 10.1016/j.jhydrol.2019.03.016
M3 - Article
AN - SCOPUS:85063979552
VL - 573
SP - 778
EP - 793
JO - Journal of hydrology
JF - Journal of hydrology
SN - 0022-1694
ER -