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屋顶绿化不仅可以增加城市绿量,缓解热岛效应,为建筑隔热保温和降噪除尘,其土壤基质和植被层还能截留雨水,是城市雨水管理的新兴手段,是城市绿化方面新的研究热点。为探索粗放式屋顶绿化的雨水截流效果,试验于2014年夏在希腊雅典进行,通过3种植物(高羊茅、克里特奥勒冈和千佛手)和2种基质深度(8 cm和16 cm)组合的粗放式屋顶绿化对灌溉水的吸收量来检验其水分吸收能力,模拟其雨水截流效果。试验包括2个研究阶段,日灌溉量分别是3.6 mm和6.0 mm。结果表明,种植克里特奥勒冈和高羊茅的屋顶绿化,夏季吸水能力较强,雨水截留能力强;种植千佛手的屋顶绿化,水分消耗慢,基质湿度波动小,耐干旱,但雨水截流能力差。
Green roof can not only increase the amount of urban green, ease the heat island effect, for building insulation and noise reduction and dust removal, the soil matrix and vegetation can still trap rainwater is an emerging means of urban stormwater management is a new research hot spot in urban greening . To explore the effect of extensive green roof stormwater interception, the experiment was conducted in Athens, Greece, in the summer of 2014. Three plant species (Tall fescue, Crete Oregon and Thousand bergamot) and two substrate depths (8 cm and 16 cm) combination of extensive roof greening irrigation water absorption to test its water absorption capacity, to simulate the effect of intercepting rainwater. The trial included two study phases with daily irrigation rates of 3.6 mm and 6.0 mm, respectively. The results showed that planting green roofs of Crete Oregon and Tall Fescue had stronger water absorption capacity in summer and better retention of rainwater. Green roofs were planted with thousands of bergamots, water consumption was slow, the fluctuation of substrate moisture was small, drought resistance, but rainwater Poor intercepting ability.