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Water 2017, 9(3), 225; doi:10.3390/w9030225

Impact of Short Duration Intense Rainfall Events on Sanitary Sewer Network Performance

1
College of Engineering and Science, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
2
Institute for Sustainability and Innovation, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Brigitte Helmreich
Received: 31 May 2016 / Revised: 21 February 2017 / Accepted: 9 March 2017 / Published: 18 March 2017
(This article belongs to the Special Issue Urban Drainage and Urban Stormwater Management)
View Full-Text   |   Download PDF [3390 KB, uploaded 18 March 2017]   |  

Abstract

Short duration intense rainfall causes an increase in rainfall derived infiltration and inflow (RDII) into aging sewer networks, which leads to Sanitary Sewer Overflows (SSOs). This study presents a generalised framework for assessing and mitigating the impacts of intense rainfall on sanitary sewer networks. The first part of the proposed framework involves a detailed hydraulic modelling to evaluate the performance of the sewer network. The second part deals with the development of SSO mitigation strategies based on Water Sensitive Urban Design (WSUD) approaches. This paper also demonstrates the application of the first part of the proposed framework for a case study catchment in Melbourne, Australia. The hydraulic performance of the case study sewer network during a wet and a dry year is presented. The analysis found that for the wet year, 11 manholes had sewer overflows, whereas 53 of 57 manholes in the network of 3.2 km had surcharges. Such a study will benefit the water authorities to develop mitigation strategies for controlling SSOs in their sewer systems. View Full-Text
Keywords: intense rainfall events; rainfall derived infiltration and inflow; sanitary sewer overflows; mitigation strategies; water sensitive urban design intense rainfall events; rainfall derived infiltration and inflow; sanitary sewer overflows; mitigation strategies; water sensitive urban design
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Nasrin, T.; Sharma, A.K.; Muttil, N. Impact of Short Duration Intense Rainfall Events on Sanitary Sewer Network Performance. Water 2017, 9, 225.

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