Urbanization process is rapidly converting forested areas and grasslands to residential, commercial, or industrial spaces, triggering soil degradation and significantly increasing impervious surfaces. Consequently, man‐made environments experience significant decrease of infiltration and groundwater recharge, enhancing the problems related to the management and protection from increased stormwater runoff. Green roofs are structural measures able to mitigate these negative drawbacks due to anthropic transformation, retaining and detaining stormwater runoff, with the main advantage of reducing hydraulic loads on combined storm sewer systems. Hydrological performance of green roofs have been studied in different parts of the world under different climatic conditions, but a comprehensive study that provides global responses, even in an approximate way, is still missing. The aim of this work is to assess the convenience and the feasibility of installing green roofs in any target area of the world, providing a rough indication of geographic regions where green roof installation is possible with good hydrological performance, and feasible in rainfed conditions with low vegetation water stress. To do that, we explored in silico green roofs' hydrological performance worldwide, using climatological forcings from ERA‐Interim database as input for a simple conceptual hydrological model to estimate green roof outputs, in terms of evapotranspiration and runoff.

中文翻译：

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不同时间尺度下全球绿色屋顶的保持性能

城市化进程正在迅速将森林地区和草原转变为住宅、商业或工业空间，引发土壤退化并显着增加不透水表面。因此，人造环境的渗透和地下水补给显着减少，加剧了与管理和保护相关的问题，使其免受雨水径流增加的影响。屋顶绿化是一种结构措施，能够减轻由于人为改造、保留和滞留雨水径流而造成的这些负面缺点，其主要优点是减少联合雨水下水道系统的水力负荷。世界不同地区在不同气候条件下研究了屋顶绿化的水文性能，但一项综合研究即使以近似的方式提供全球响应，仍然失踪。这项工作的目的是评估在世界任何目标地区安装屋顶绿化的便利性和可行性，粗略地表明可以安装屋顶绿化且水文性能良好的地理区域，并在雨养条件下可行植被水分胁迫。为此，我们使用来自 ERA-Interim 数据库的气候强迫作为简单概念性水文模型的输入，在全球范围内探索了硅绿屋顶的水文性能，以估计蒸散和径流方面的屋顶绿化输出。提供一个地理区域的粗略指示，在那里可以安装绿色屋顶，具有良好的水文性能，并且在植被水分压力低的雨养条件下可行。为此，我们使用来自 ERA-Interim 数据库的气候强迫作为简单概念性水文模型的输入，在全球范围内探索了硅绿屋顶的水文性能，以估计蒸散和径流方面的屋顶绿化输出。提供一个地理区域的粗略指示，在那里可以安装绿色屋顶，具有良好的水文性能，并且在植被水分压力低的雨养条件下可行。为此，我们使用来自 ERA-Interim 数据库的气候强迫作为简单概念性水文模型的输入，在全球范围内探索了硅绿屋顶的水文性能，以估计蒸散和径流方面的屋顶绿化输出。