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Drinking Water Engineering and Science An interactive open-access journal

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doi:10.5194/dwes-2017-9
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
01 Mar 2017
Review status
This discussion paper is under review for the journal Drinking Water Engineering and Science (DWES).
A case study of rainfall-derived infiltration and inflow on a separate sanitary sewer system
Nelson J. G. Carriço1, Rita Brito2, and Manuel Baptista1 1Barreiro School of Technology, Polytechnic Institute of Setubal, Rua Américo da Silva Marinho, 2839 - 001 Lavradio, Portugal
2National Laboratory of Civil Engineering, Avenida do Brasil, 101, 1700-066 Lisbon, Portugal
Abstract. Rainfall-derived infiltration and inflow (RDII) can interfere with the performance of domestic wastewater drainage systems. It is also a major cause for the deterioration of the functional performance in those systems and for the occurrence of domestic wastewater untreated discharges to the water environment. In most cases, the actual size and location of these inflows are unknown. To assess this subject of RDII, a detailed knowledge of the network is required as well as a diagnosis of the problem, namely, the type of inflows, the magnitude of their occurrence and the location of the most relevant impacts. This paper presents the application of a methodology to estimate RDII on a Portuguese case study.

Citation: Carriço, N. J. G., Brito, R., and Baptista, M.: A case study of rainfall-derived infiltration and inflow on a separate sanitary sewer system, Drink. Water Eng. Sci. Discuss., doi:10.5194/dwes-2017-9, in review, 2017.
Nelson J. G. Carriço et al.
Nelson J. G. Carriço et al.
Nelson J. G. Carriço et al.

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Short summary
This paper presents the application of a methodology to estimate RDII on a Portuguese case study. A two-step based methodology based in hydraulic modelling and assessment and performance evaluation was explained and applied. The aim of the study was to estimate the amount of RDII in the sanitary system and locate the priority intervention areas mostly concerning direct rainwater inflow.
This paper presents the application of a methodology to estimate RDII on a Portuguese case...
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