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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Scale dynamics of extensive green roofs: Quantifying the effect of drainage area and rainfall characteristics on observed and modeled green roof hydrologic performance
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Scale dynamics of extensive green roofs: Quantifying the effect of drainage area and rainfall characteristics on observed and modeled green roof hydrologic performance

机译：广泛的绿化屋顶的尺度动力学：量化流域面积和降雨特征对观测和建模的绿化屋顶水文性能的影响

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摘要

Green roofs offer many benefits for dense urban environments, one of which is their potential to supplement existing stormwater management infrastructure. The ability of green roof systems to act as a decentralized rainwater retention and detention network has been the topic of many recent studies. While these studies have provided important insight into the hydrologic performance of green roofs, none to date, to the knowledge of the authors, have specifically examined the effect of green roof drainage area on system performance in an urban climate. This research aims to understand how rainfall characteristics and green roof scale impact the peak and cumulative volume of green roof runoff during individual storm events. The performance of three extensive green roofs in New York City, each having the same engineered components and age but different drainage areas, is analyzed. It is found that green roof drainage area has the greatest impact on peak runoff reduction peak runoff reduction increases with increasing drainage area whereas rainfall retention and the time to peak runoff are not greatly influenced by drainage area. Data collected from the three green roofs are used to examine the applicability of a one-dimensional infiltration model, HYDRUS-1D, in predicting hydrologic behavior across the different green roof spatial scales. It is found that model performance improves as the green roof drainage area and rainfall volume increases. However, in general, HYDRUS-1D is only partially able to capture the hydrologic behavior of extensive green roofs across the different rooftop scales examined during this study. (C) 2014 Elsevier B.V. All rights reserved.
机译：绿化屋顶为稠密的城市环境提供了许多好处，其中之一就是可以补充现有的雨水管理基础设施。近期许多研究的主题是，屋顶绿化系统充当分散的雨水滞留和滞留网络的能力。尽管这些研究为绿色屋顶的水文性能提供了重要的见识，但据作者所知，迄今为止，还没有一个专门检查了绿色屋顶排水面积对城市气候中系统性能的影响。这项研究旨在了解降雨特征和屋顶绿化规模如何在单个暴风雨事件中影响屋顶绿化径流的峰值和累积量。分析了纽约市三个扩展的绿色屋顶的性能，每个屋顶具有相同的工程组件和年龄，但排水区域不同。研究发现，屋顶绿化流域对峰值径流减少的影响最大，峰值径流减少量随着流域面积的增加而增加，而降雨保持率和达到峰值径流的时间不受流域的影响很大。从三个绿色屋顶收集的数据用于检查一维渗透模型HYDRUS-1D在预测不同绿色屋顶空间尺度上的水文行为时的适用性。发现模型性能随着屋顶绿化排水面积和降雨量的增加而提高。但是，一般而言，HYDRUS-1D只能部分捕获跨此研究过程中所研究的不同屋顶规模的大面积绿色屋顶的水文行为。 （C）2014 Elsevier B.V.保留所有权利。

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