Optimal control of combined sewer systems using SWMM 5.0

Upaka Sanjeewa Rathnayake, Tiku Tanyimboh

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

9 Citations (Scopus)


Combined sewer networks carry wastewater and stormwater together. Capacity limitation of these sewer networks results in combined sewer overflows (CSOs) during high-intensity storms. Untreated CSOs when directly discharged to the nearby natural water bodies cause many environmental problems. Controlling urban wastewater systems is one possible way of addressing the environmental issues from CSOs. However, controlling urban sewer systems optimally is still a challenge, when considering the receiving water quality effects. In this study, a multi-objective optimization approach was formulated considering the pollution load to the receiving water from CSOs and the cost of the wastewater treatment. The optimization model was tested using an interceptor sewer system. The results demonstrate the benefits of the multi-objective optimization approach and its potential to establish the key properties of a range of control strategies through an analysis of the various tradeoffs involved.
Original languageEnglish
Title of host publicationUrban Water 2012 conference proceedings
EditorsS. Mambretti, C.A. Brebbia
Place of PublicationSouthampton
PublisherWIT Press
Number of pages10
ISBN (Print)9781845645762
Publication statusPublished - Apr 2012
EventUrban Water 2012 - New Forest, United Kingdom
Duration: 25 Apr 201227 Apr 2012


ConferenceUrban Water 2012
Country/TerritoryUnited Kingdom
CityNew Forest


  • combined sewer overflows
  • combined sewer systemseffluent quality index
  • genetic algorithm
  • multiobjective optimization
  • evolutionary computing
  • combined sewer system
  • SWMM 5.0


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