Optimisation of a fuzzy logic-based local real-time control system for mitigation of sewer flooding using genetic algorithms

Steve Mounce, Will Shepherd, Sonja Ostojin, Mohamad Abdel-Aal, Alma Schellart, James Shucksmith, Simon Tait

Research output: Contribution to journalArticlepeer-review


Urban flooding damages properties, causes economic losses and can seriously threaten public health. An innovative, fuzzy logic (FL)-based, local autonomous real-time control (RTC) approach for mitigating this hazard utilising the existing spare capacity in urban drainage networks has been developed. The default parameters for the control algorithm, which uses water level-based data, were derived based on domain expert knowledge and optimised by linking the control algorithm programmatically to a hydrodynamic sewer network model. This paper describes a novel genetic algorithm (GA) optimisation of the FL membership functions (MFs) for the developed control algorithm. In order to provide the GA with strong training and test scenarios, the compiled rainfall time series based on recorded rainfall and incorporating multiple events were used in the optimisation. Both decimal and integer GA optimisations were carried out. The integer optimisation was shown to perform better on unseen events than the decimal version with considerably reduced computational run time. The optimised FL MFs result in an average 25% decrease in the flood volume compared to those selected by experts for unseen rainfall events. This distributed, autonomous control using GA optimisation offers significant benefits over traditional RTC approaches for flood risk management.

Original languageEnglish
Pages (from-to)281-295
Number of pages15
JournalJournal of Hydroinformatics
Issue number2
Early online date24 Dec 2019
Publication statusPublished - 1 Mar 2020

Bibliographical note

Funding Information:
The CENTAUR project (www.shef.ac.uk/centaur) has received funding from the European Union’s Horizon 2020 research and the innovation programme under grant agreement no. 641931. The contents of this paper reflect the view of the authors – the Executive Agency for Small and Medium-sized Enterprises (EASME) of the European Commission is not responsible for any use that may be made of the information it contains.

Publisher Copyright:
© IWA Publishing 2020


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