Assessing sewer–groundwater interaction at the city scale based on individual sewer defects and marker species distributions

Wolf, Leif; Eiswirth, M.; Hötzl, H.

doi:10.1007/s00254-006-0180-x

Cited by 44 publications

(34 citation statements)

References 7 publications

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“…These comprise 13 646 damaged or improperly installed house connections, 7 363 joint displacements, 4 109 cracks, 2 100 obstacles, 1 584 root intrusions, 1 563 corrosion problems, and 641 other defects. To contextualise these data, it is important to note that the city of Rastatt has an exceptionally good rehabilitation department and that these values relate to a rather well maintained sewer network [4].…”

Section: Ausgewähltementioning

confidence: 99%

“…Quantitative estimates of leaking sewage volumes were carried out by Dohmann et al [2], Härig and Mull [3], and Wolf et al [4]. These ranged as high as 1587 m 3 /(km a) wastewater exfiltration [2].…”

Section: General Commentsmentioning

confidence: 99%

“…The results of a closed circuit television inspection are managed with a sewer defect database and indicate a large number of defects in the sewer system through which connection with the groundwater is possible [4]. Along the length of a 208 km extension of the sewer system (consisting of combined rainwater and wastewater collection and separated wastewater collection), a total number of 31 006 defects were identified.…”

Section: Ausgewähltementioning

confidence: 99%

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Microbiological Condition of Urban Groundwater in the Vicinity of Leaky Sewer Systems

Paul

Wolf

Fund

et al. 2004

Acta hydrochim. hydrobiol.

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The possible deterioration of the microbiological quality of groundwater due to leaky sewer systems was investigated in a medium‐sized city (Rastatt) in SW‐Germany. Specially constructed focus observation wells drilled close to leaky sewers have been compared with the background observation wells in urban and rural areas. The sampling was performed in March (shallow depth of groundwater) and in July and October (deep groundwater table). It included the measurement of ammonium ions, temperature, electric conductivity, oxygen, and the depth of the groundwater table. Coliforms, Escherichia coli, and enterococci were enumerated as indicator organisms for wastewater contamination. In addition, the total number of colony forming units was determined. Bacterial counts of coliforms and E. coli generally increased during the course of the investigation (March to October). This may have been caused either by a slightly increased groundwater temperature (higher activity rates) or by a higher proportion of sewage in the urban groundwater system as a result of the dry season (summer). The contamination with faecal indicator bacteria was greater adjacent to leakage locations. In addition, elevated concentrations of ammonium ions were observed at these areas. The results provide evidence that leaky sewer systems elevate faecal indicator concentrations in groundwater with associated potential health risk where such waters are used for potable water supply.

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Section: Ausgewähltementioning

confidence: 99%

Section: General Commentsmentioning

confidence: 99%

Section: Ausgewähltementioning

confidence: 99%

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Microbiological Condition of Urban Groundwater in the Vicinity of Leaky Sewer Systems

Paul

Wolf

Fund

et al. 2004

Acta hydrochim. hydrobiol.

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“…Hydrogeological maps are needed for a wide range of applications such as (see details in Chaminé, Carvalho, Teixeira, & Freitas, 2015;Margat & van der Gun, 2013): protecting groundwater resources from deterioration (Ravikumar, Venkatesharaju, Prakash, & Somashekar, 2011); defining groundwater protection zones in newly urbanized contexts (Thomsen, Sondergssrd, & Sorensen, 2004); assessing groundwater potential (Oh, Kim, Choi, Park, & Lee, 2011); identifying groundwater vulnerability (Wolf, Eiswirth, & Hotzl, 2006); quantifying the recharge due to sewer and pipe leakage (Yang, Lerner, Barrett, & Tellam,1999), furnishing the basic information for underground infrastructure design and to perform city-scale groundwater modeling (Di Salvo, Moscatelli, Mazza, Capelli, & Cavinato, 2014;La Vigna, Demiray, & Mazza, 2013;La Vigna, Hill, Rossetto, & Mazza, 2016) and the historical evolution of urban groundwater systems Freitas et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Groundwater of Rome

Vigna¹,

Mazza

Amanti

et al. 2016

Journal of Maps

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This paper describes the contents of the new Hydrogeological Map of the City of Rome (1:50,000 scale). The map extends to the entire municipality (1285 km 2 ) and is based on both the most recent scientific studies on the groundwater field and new survey activities carried out in order to fill the data gaps in several areas of the examined territory. The map is the result of a combination of different urban groundwater expertise and Geographic Information System (GIS)-based mapping performed using the most recent available data and has been produced with the intention of furnishing the City of Rome with the most recent and updated information regarding groundwater. ARTICLE HISTORY

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“…From leaky sewer systems, wastewater conceivably lost and infiltrates into the soil and eventually into ground water that can seriously affect water resources quality (Ellis et al 2009;Karpf et al 2011;Schwarzenbach et al 2006;Wolf et al 2006). From the sewer point of view, this process is known as exfiltration.…”

Section: Introductionmentioning

confidence: 99%

Water displacement by surfactant solution: an experimental study to represent wastewater loss from sewers to saturated soil

Nikpay

Lazik

Krebs

2014

Int. J. Environ. Sci. Technol.

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Leakage of wastewater from sewer lines may result in contamination of soil and groundwater. Our investigation dealt with the effects of surfactant as one of the constituents of wastewater on the infiltration process of wastewater through soil. To that aim, in a laboratory experiment, a column was uniformly packed with glass beads of 0.25-0.50 mm diameter and equipped with sensors to measure local fluid pressure at three observation points along the direction of flow. The artificial laboratory wastewater was created by adding a commercially available detergent to degassed tap water producing surfactant concentrations between 8 and 16 mg l -1 . The displacement process of degassed tap water by such a particle-free artificial wastewater was studied by loading the surfactant solution into the saturated glass beads column. Short-term pressure changes were observed while the interface between water and surfactant solution passed the observation points within the column. The pressure peaks increased for higher surfactant concentrations. The theory of growing interface between surfactant solution and clean water by aggregation of monomers to a double layer could be supported by the column experiments.

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Assessing sewer–groundwater interaction at the city scale based on individual sewer defects and marker species distributions

Cited by 44 publications

References 7 publications

Microbiological Condition of Urban Groundwater in the Vicinity of Leaky Sewer Systems

Microbiological Condition of Urban Groundwater in the Vicinity of Leaky Sewer Systems

Groundwater of Rome

Water displacement by surfactant solution: an experimental study to represent wastewater loss from sewers to saturated soil

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