Groundwater intrusion into leaky sewer systems
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In: Water Science and Technology, Vol. 62, No. 1, 2010, p. 92-98.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Groundwater intrusion into leaky sewer systems
AU - Wittenberg, Hartmut
AU - Aksoy, Hafzullah
PY - 2010
Y1 - 2010
N2 - Vast volumes of groundwater are drained by urban sewer systems. This unwanted flow component intrudes into sewer systems through leaky joints or connected house drains. However, unlike urban storm drainage, it has a high seasonal variation corresponding to groundwater storage and long slow recessions similar to baseflow in rivers also fed by shallow groundwater exfiltrating into the surface waters. By applying the nonlinear reservoir algorithm as used for baseflow separation from total flow in a river, groundwater flow is separated from daily measured influents to treatment plants in Lower Saxony and Baden-Württemberg, Germany and in the Terkos Lake watershed near Istanbul, Turkey. While waste water flows vary only moderately within a year, separated intruded groundwater flows show recessions and seasonal variations correlated to baseflow in neighbouring rivers. It is possible to conclude that recession characteristics of treatment plant influents allow quantification and prediction of groundwater intrusion into sewer systems.
AB - Vast volumes of groundwater are drained by urban sewer systems. This unwanted flow component intrudes into sewer systems through leaky joints or connected house drains. However, unlike urban storm drainage, it has a high seasonal variation corresponding to groundwater storage and long slow recessions similar to baseflow in rivers also fed by shallow groundwater exfiltrating into the surface waters. By applying the nonlinear reservoir algorithm as used for baseflow separation from total flow in a river, groundwater flow is separated from daily measured influents to treatment plants in Lower Saxony and Baden-Württemberg, Germany and in the Terkos Lake watershed near Istanbul, Turkey. While waste water flows vary only moderately within a year, separated intruded groundwater flows show recessions and seasonal variations correlated to baseflow in neighbouring rivers. It is possible to conclude that recession characteristics of treatment plant influents allow quantification and prediction of groundwater intrusion into sewer systems.
KW - Environmental planning
KW - Baseflow separation
KW - Groundwater intrusion
KW - Infiltration into sewers
KW - Leaky sewer
KW - Parasite water
KW - Pirate water
UR - http://www.scopus.com/inward/record.url?scp=77957259621&partnerID=8YFLogxK
U2 - 10.2166/wst.2010.287
DO - 10.2166/wst.2010.287
M3 - Journal articles
C2 - 20595758
VL - 62
SP - 92
EP - 98
JO - Water Science and Technology
JF - Water Science and Technology
SN - 0273-1223
IS - 1
ER -