Università degli Studi di Cagliari, Department of Civil-Environmental Engineering and Architecture, University of Cagliari, Via Marengo 2, 09123, Cagliari, Italy.
Università degli Studi di Cagliari, Department of Civil-Environmental Engineering and Architecture, University of Cagliari, Via Marengo 2, 09123, Cagliari, Italy.
J Environ Manage. 2023 Oct 1;343:118248. doi: 10.1016/j.jenvman.2023.118248. Epub 2023 May 25.
Multilayer Blue-Green Roofs are powerful nature-based solutions that can contribute to the creation of smart and resilient cities. These tools combine the retention capacity of traditional green roofs with the water storage of a rainwater harvesting tank. The additional storage layer enables to accumulate the rainwater percolating from the soil layer, that, if properly treated, can be reused for domestic purposes. Here, we explore the behavior of a Multilayer Blue-Green Roof prototype installed in Cagliari (Italy) in 2019, that have been equipped with a remotely controlled gate to regulate the storage capacity of the system. The gate installation allows to manage the Multilayer Blue-Green Roof in order to increase the flood mitigation capacity, minimizing the water stress for vegetation and limiting the roof load with adequate management practices. In this work, 10 rules for the management of the Multilayer Blue-Green Roof gate have been investigated and their performances in achieving different management goals (i.e., mitigating urban flood, increasing water storage and limiting roof load on the building) have been evaluated, with the aim to identify the most efficient approach to maximize the benefits of this nature based solution. An ecohydrological model have been calibrated based on field measurements carried out for 6 months. The model has been used to simulate the system performance in achieving the proposed goals, using as input nowdays and future rainfall and temperature time series. The analysis reveled the importance of the correct management of the gate, highthing how choosing and applying a specific management rule helps increasing the performance in reaching the desired goal.
多层蓝绿屋顶是强大的基于自然的解决方案，可以为建设智慧城市做出贡献。这些工具结合了传统绿色屋顶的蓄水能力和雨水收集池的储水能力。额外的储存层可以积累从土壤层渗透的雨水，如果经过适当处理，这些雨水可以被重新用于家庭用途。在这里，我们探索了 2019 年在意大利卡利亚里安装的多层蓝绿屋顶原型的行为，该屋顶配备了远程控制门来调节系统的储水能力。门的安装允许对多层蓝绿屋顶进行管理，以提高洪水缓解能力，最大限度地减少植被的水分压力，并通过适当的管理实践限制屋顶对建筑物的负荷。在这项工作中，研究了 10 种管理多层蓝绿屋顶门的规则，并评估了它们在实现不同管理目标（即减轻城市洪水、增加储水量和限制屋顶对建筑物的负荷）方面的性能，旨在确定最有效的方法来最大限度地发挥这种基于自然的解决方案的效益。基于 6 个月的实地测量，我们对一个生态水文学模型进行了校准。该模型被用于模拟系统在实现所提出的目标方面的性能，使用当前和未来的降雨和温度时间序列作为输入。分析结果表明，正确管理门的重要性，选择和应用特定的管理规则有助于提高实现预期目标的性能。
