Print Email Facebook Twitter Real-time control of combined sewer systems: Risks associated with uncertainties Title Real-time control of combined sewer systems: Risks associated with uncertainties Author van der Werf, J.A. (TU Delft Sanitary Engineering) Kapelan, Z. (TU Delft Sanitary Engineering) Langeveld, J.G. (TU Delft Sanitary Engineering; Partners4UrbanWater) Date 2023 Abstract Model Predictive Control (MPC) of combined sewer systems can reduce environmental degradation caused by uncontrolled overflows. However, practical uncertainties are often neglected when assessing the potential of MPC strategies. This paper aims to understand the risks associated with using a non-perfect internal MPC-model, real precipitation forecast, and realistic dynamic system capacity fluctuations. An MPC with the objective to reduce the total combined sewer overflow (CSO) volume was implemented in the case study of Eindhoven in the Netherlands where highly sensitive waterways receive the sewer overflows. Two types of risks were identified: relative system performance loss and operative deterioration. The former entails a practical decrease in efficacy of controlling CSO spills compared to the theoretical situation, whereas the latter describes the aggravation of environmental pollution compared to a static form of system operation. The results obtained demonstrate that precipitation forecast uncertainty is associated with a small relative system performance loss. Opposite to this, significant performance loss was observed as a consequence of uncertainties in the internal MPC model and the actual sewer system capacity available. The latter caused additional combined sewer overflows compared to a statically optimised control for smaller precipitation events. Subject Combined sewer overflowsModel predictive controlOperational optimisationRisk analysisUncertainty To reference this document use: http://resolver.tudelft.nl/uuid:24a89895-e780-4446-a51b-40825d08eb4e DOI https://doi.org/10.1016/j.jhydrol.2022.128900 ISSN 0022-1694 Source Journal of Hydrology, 617 Part of collection Institutional Repository Document type journal article Rights © 2023 J.A. van der Werf, Z. Kapelan, J.G. Langeveld Files PDF 1_s2.0_S0022169422014706_main.pdf 4.75 MB Close viewer /islandora/object/uuid:24a89895-e780-4446-a51b-40825d08eb4e/datastream/OBJ/view