Journal article
Coordinating rule-based and system-wide model predictive control strategies to reduce storage expansion of combined urban drainage systems: The case study of Lundtofte, Denmark
The environmental benefits of combining traditional infrastructure solutions for urban drainage (increasing storage volume) with real time control (RTC) strategies were investigated in the Lundofte catchment in Denmark, where an expensive traditional infrastructure expansion is planned to comply with environmental requirements.
A coordinating, rule-based RTC strategy and a global, system-wide risk-based dynamic optimization strategy (model predictive control), were compared using a detailed hydrodynamic model. RTC allowed a reduction of the planned storage volume by 21% while improving the system performance in terms of combined sewer overflow (CSO) volumes, environmental impacts, and utility costs, which were reduced by up to 10%.
The risk-based optimization strategy provided slightly better performance in terms of reducing CSO volumes, with evident improvements in environmental impacts and utility costs, due to its ability to prioritize among the environmental sensitivity of different recipients. A method for extrapolating annual statistics from a limited number of events over a time interval was developed and applied to estimate yearly performance, based on the simulation of 46 events over a five-year period.
This study illustrates that including RTC during the planning stages reduces the infrastructural costs while offering better environmental protection, and that dynamic risk-based optimisation allows prioritising environmental impact reduction for particularly sensitive locations.
Language: | English |
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Publisher: | MDPI AG |
Year: | 2018 |
Pages: | 76 |
ISSN: | 20734441 |
Types: | Journal article |
DOI: | 10.3390/w10010076 |
ORCIDs: | Mikkelsen, Peter Steen and Vezzaro, Luca |
Accidents and Accident Prevention Automatic Control Principles and Applications Catchments Combined sewer overflow (CSO) Combined sewer overflows Combined sewers Coordinating real time control (RTC) Cost and Value Engineering; Industrial Economics Cost reduction Costs Dynamic Overflow Risk Assessment (DORA) Environmental Impact and Protection Environmental benefits Environmental impact Environmental impact reduction Environmental requirement Environmental sensitivities Hydraulic engineering Model predictive control Optimization strategy Real time control Receiving waters Risk assessment Sensitivity of receiving waters Sewage Sewage and Industrial Wastes Treatment Sewers TC1-978 TD201-500 Urban drainage systems Water supply for domestic and industrial purposes combined sewer overflow (CSO) coordinating real time control (RTC) environmental impact reduction sensitivity of receiving waters