Author(s): Shahrzad Hamidiaala; Hamidreza Shirkhani; Abdolmajid Mohammadian; Sophie Duchesne
Linked Author(s): Majid Mohammadian
Keywords: Nature-based solutions; Real-time control; Blue roof; Stormwater control measures; Climate change
Abstract: Among different types of green infrastructure (GI) and nature-based solutions (NBS), the application of Real-time control (RTC) on blue roof systems has elicited limited research. Here, the impact of rule-based control (RBC), integrated with optimization, on a blue roof, in delaying and attenuating peak outflows is investigated. Expert-defined rules control water releases of blue tank. A single-objective optimization function identifies best values for the decision variable to maximize peak outflow attenuation. Through optimization, without manual alterations to the rules, the decision variable is constantly adjusted to reach the objective. Optimization, performed both based on a synthetic design storm and historical storms, proves to enhance RBC performance in peak outflow attenuation, compared to non-optimized RBC. Deliberate delay in releasing runoff in controlled portions can mitigate both CSO and flooding risks through reducing the overwhelming load imposed on urban drainage systems (UDS) during heavy rainfalls.
Year: 2024