TY - GEN T1 - Technical performance assessment of Inflow effects: experimental urban sewer system in Portugal AU - Cardoso, M.A. AU - Almeida, M.C. AU - David, C. DO - 10.4122/1.1000001173 UR - https://www.datacite.org/invalid.html AB - In separate domestic sewer systems the excess of wastewater volumes in wastewater treatment plants can be due to infiltration into the sewer system from the groundwater, or due to storm water inflows coming from cross connections of storm drains, connected impervious areas and leaking manholes covers. In general, the effects of inflow/infiltration (I/I) are relatively obvious but usually there is no objective information on its quantification, origin and economic impact. The location and detection of cross connections in selected areas together with the technical performance assessment of the system can support the establishment of intervention priorities. If done extensively, without selection of the most affected areas, this procedure can be time consuming and expensive, especially for large sewer systems without clear benefits. However, if integrated in the planning of O&M interventions it can be a means of updating system information and correcting the malfunctions of the sewer system and improve its performance. In this paper a study on I/I in an experimental urban catchment of 4.5 ha, near Lisbon, in Portugal is presented. The main objectives of the work were to evaluate and quantify I/I effects on the system performance and to identify the number and location of cross connections as a first step to define a broader methodology. KW - Infiltration/inflow KW - technical performance assessment KW - experimental monitoring PY - 2005 PB - DTU Library, Technical University of Denmark (DTU) LA - en ER -