Title: Measurement of infiltration rates in urban sewer systems by use of oxygen isotopes 
Resource Type: document --> technical publication --> proceedings / conference paper(s) 
Country: EU Projects 
Year of publication: 2004 
Availability: De Bénédittis J., Bertrand-Krajewski J.-L. Measurement of infiltration rates in urban sewer systems by use of oxygen isotopes, 4th International conference on 'Sewer Processes and Networks' proceedings, Madeira, Portugal, 22-24 November 2004, 8p. 
Author 1/Producer: De Bénédittis J. 
Other Authors/Producers: Bertrand-Krajewski J.-L. 
Author / Producer Type: EC Project 
Report / download web link (=direct link): http://www.insa-lyon.fr/Laboratoires/URGC-HU/apuss/nrl_029_m ...  
Format (e.g. PDF): PDF 
EUGRIS Keyword(s): Water resources and their management -->Water resources and their management Overview
Short description: The paper presents the principle of a method to measure infiltration rates in sewer systems based on the use of oxygen isotopes and its application in Lyon (France). In the urban area of Lyon, significant differences in δ 18O that can reach 3 ‰ are observed between the oxygen isotopic compositions of groundwater originating from Rhone, Saone and from their associated alluvial aquifers. Drinking water supplying Lyon results mainly from pumping in the Rhone alluvial aquifer. Therefore, in some areas, the difference of isotopic composition between wastewater resulting from the consumption of drinking water and local groundwater can be used to measure infiltration in sewer system. The application in the catchment of Ecully shows that the infiltration flow rate presents strong fluctuations at hourly scale: it varies between 15 and 40 m3/h. This variability could be explained by non constant discharges of pumping and by variations of the water level in the sewer. 
Link to Project(s): APUSS Assessing infiltration and exfiltration on the performance of urban sewer systems
Submitted By: Dr Stefan Gödeke WhoDoesWhat?      Last update: 14/02/2006

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