A generalized Dynamic Overflow Risk Assessment (DORA) for urban drainage RTC

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

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An innovative generalized approach for integrated real time control of urban drainage systems is presented. The Dynamic Overflow Risk Assessment (DORA) strategy tries to minimize the expected overflow risk by considering (i) the water volume presently stored in the drainage network, (ii) the expected runoff volume (calculated by radar-based rainfall forecast models) and (iii) the estimated uncertainty of the runoff forecasts. The inclusion of uncertainty allows a more
confident use of Real Time Control (RTC). Overflow risk is calculated by a flexible function which allows prioritization of the discharge points according to their sensitivity. DORA was tested on an example inspired by a catchment in the city of Aarhus (Denmark). By using a simple conceptual model, a statistical
analysis of the performance of DORA was performed. Compared to a traditional local control approach, DORA contributed to reduce Combined Sewer Overflow
loads and to optimize the flow discharged to the wastewater treatment plant. Also, the inclusion of forecasts and their uncertainty contributed to further improve the performance of drainage systems. The results of this paper will contribute to a wider usage of global RTC methods in the management of urban drainage
Original languageEnglish
Title of host publicationUrban Drainage Modelling : Proceedings of the Ninth International Conference on Urban Drainage Modelling, Belgrade, Serbia, 4-6 September 2012
Number of pages11
PublisherUniversity of Belgrade
Publication date2012
ISBN (print)978-86-7518-156-9
StatePublished - 2012
Event9th International Conference on Urban Drainage Modelling - Belgrade, Serbia


Conference9th International Conference on Urban Drainage Modelling
Internet address


  • Integrated urban water management, Model predictive control, Overflow risk, Real time control, Uncertainty
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ID: 12217825