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城市空间立体绿化作为城市绿化的重要形式,具有拓展城市绿色空间、美化城市景观、降低建筑能耗、延长结构寿命、缓解热岛效应、改善空气质量、减少雨洪压力等综合功能。绿化屋顶夏季室温平均比未绿化屋顶室温平均低1.9℃;花园式屋顶绿化平均滞尘量为12.3g/㎡·年,简单式屋顶绿化平均滞尘量为8.5g/㎡·年;花园式屋顶绿化可截留雨水64.6%;简单式屋顶绿化可截留雨水21.5%,屋顶绿化平均可截留雨水43.1%。
Three-dimensional urban green space as an important form of urban greening, with the expansion of urban green space, beautify the city landscape, reduce building energy consumption, extend the life of the structure, ease the heat island effect, improve air quality, reduce rain pressure and other comprehensive functions. The average roof temperature of green roofs in summer is 1.9 ℃ lower than the average roof temperature of un-roofed roofs. The average dust retention capacity in garden-style roof greening is 12.3g / ㎡ · year, and the average dust removal capacity in simple roof greening is 8.5g / ㎡ · year. Greening can trap 64.6% of rainwater; simple roof greening can trap rainwater by 21.5% and roof greening can trap rainwater by 43.1% on average.