Recent decades have witnessed unprecedented meteorological perturbations all around the world. Population densities, on the other hand, continue to expand, leading to unplanned urbanization, and in turn, excessive imperviousness. Disturbed hydrological behavior in urbanized areas, combined with harsh rain events, triggers urban flooding, inflicting casualties, and massive damage to municipalities. The dynamic nature of an ever-changing climate and growing population warrants a solution capable of aligning its components with changing requirements. Although on the city scale, nature-based solutions, such as blue-green, have proven effective for flood mitigation, their static design conflicts with dynamic conditions. The application of real-time control (RTC) to nature-based solutions, such as storage ponds, has been studied in the literature to overcome their inherent passive function, thereby eliciting a proper dynamic response during critical conditions. However, blue-green infrastructure equipped with RTC has not attracted much attention. The integration of blue-green roofs with the RTC technology can improve hydrological performance. In this study, the efficacy of RTC applied to blue-green roofs was investigated. The RTC is developed based on pre-optimized RBC controls, monitoring both the accumulation and release schedules of water. Downstream constraints, along with the domestic demand of the building, are considered in developing the strategy. The application of RTC, in addition to the benefits for stormwater management and urban flood control, helps with the non-potable domestic usage of stored water that fosters sustainability, delivering potentially a more affordable and readily available source of water to residents.

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Evaluating the Impacts of Real-Time Controlled Blue Roofs on Urban Flood Mitigation

  • Shahrzad Hamidiaala,
  • Hamidreza Shirkhani,
  • Abdolmajid Mohammadian,
  • Sophie Duchesne

摘要

Recent decades have witnessed unprecedented meteorological perturbations all around the world. Population densities, on the other hand, continue to expand, leading to unplanned urbanization, and in turn, excessive imperviousness. Disturbed hydrological behavior in urbanized areas, combined with harsh rain events, triggers urban flooding, inflicting casualties, and massive damage to municipalities. The dynamic nature of an ever-changing climate and growing population warrants a solution capable of aligning its components with changing requirements. Although on the city scale, nature-based solutions, such as blue-green, have proven effective for flood mitigation, their static design conflicts with dynamic conditions. The application of real-time control (RTC) to nature-based solutions, such as storage ponds, has been studied in the literature to overcome their inherent passive function, thereby eliciting a proper dynamic response during critical conditions. However, blue-green infrastructure equipped with RTC has not attracted much attention. The integration of blue-green roofs with the RTC technology can improve hydrological performance. In this study, the efficacy of RTC applied to blue-green roofs was investigated. The RTC is developed based on pre-optimized RBC controls, monitoring both the accumulation and release schedules of water. Downstream constraints, along with the domestic demand of the building, are considered in developing the strategy. The application of RTC, in addition to the benefits for stormwater management and urban flood control, helps with the non-potable domestic usage of stored water that fosters sustainability, delivering potentially a more affordable and readily available source of water to residents.