Infiltration and inflow in foul sewer networks

I. Zalachori, Infiltration and inflow in foul sewer networks, 103 pages, Department of Water Resources, Hydraulic and Maritime Engineering – National Technical University of Athens, Athens, July 2005.



Infiltration and inflow (I/I) is a major problem in sewer systems. According to international reviews, infiltration and inflow are often estimated as 100% of sewage flow, causing major damage both to the system and the treatment facility. In some countries proper regulation has been applied, though in others research is still in process. International reference provides a variety of methods for the identification of I/I sources and the rehabilitation of sewers. In the framework of this thesis, pilot cases have been studied for the cities of Ioannina and Karditsa in Greece. At first, infiltration and inflow conditions were identified for each city and then a model was developed for the quantification of I/I. Finally, the reliability of the model was verified and the components of sewage were analysed. In addition, a primary investigation was conducted for the cities of Argos and Nafplio.

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