Vegetated roofs rainwater management experimental research in Brazil: A georeferenced exhaustive review of a continental-size country

Lucas Gobatti, Brenda Chaves Coelho Leite
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引用次数: 1

Abstract

Flood risk is an increasing concern in densely populated cities as urban drainage systems are demanded progressively more. The need for decentralising water management becomes relevant, and vegetated roofs are internationally known to be able to assist in locally retaining and detaining stormwater. For these Nature-based Solutions to be effective, there must be science-based standardisation, supporting decision-makers towards effective public policy-making based on hydrological performance. However, this performance should be associated with local environmental conditions, and continental-size countries such as Brazil can have a large variety of climates. At the same time, Brazil lacks a comprehensive review associating experimental results with climatic classifications. In this sense, the present work aims at reviewing the experimental research undertaken in Brazil and synthesising its rainwater retention outcomes associating it to the Köppen-Geiger climate classification. To accomplish this task, the Rational Method is used to extract and conform data from 34 records involving internationally and nationally published works as well as grey literature. Results of this work present to national researchers not only gaps but important trends, generating further innovative opportunities for work, and present to international researchers an accessible and georeferenced bulk of data on vegetated roofs' hydrological performance in Brazil with the highest possible resolution. It was found that semi-arid climates had the best average rainwater retention rates (0.79), followed by subtropical (0.54–0.72), and the tropical climates had the lowest (0.55–0.69). The work concludes that vegetated roofs have a positive hydrological performance throughout Brazil. However, further work is needed to quantify the hydrological influence of a range of different structural and environmental factors that modify the roofs' performance. It is also shown that climates, particularly outside the financial centres of Brazil, lack data and hence need further investigation and experimental research.

巴西植被屋顶雨水管理实验研究:对一个大陆大小的国家的地理参考详尽审查
随着对城市排水系统的要求越来越高,洪水风险在人口密集的城市日益受到关注。分散水管理的需要变得相关,国际上都知道植被屋顶能够帮助当地保留和留住雨水。为了使这些基于自然的解决方案有效,必须有基于科学的标准化,支持决策者根据水文表现进行有效的公共决策。然而,这种表现应该与当地的环境条件有关,像巴西这样的大陆大小的国家可能有各种各样的气候。与此同时,巴西缺乏将实验结果与气候分类联系起来的全面审查。从这个意义上说,目前的工作旨在审查在巴西进行的实验研究,并综合其与Köppen-Geiger气候分类相关的雨水保留结果。为了完成这项任务,使用Rational方法从34条记录中提取和整合数据,这些记录涉及国际和国内出版的作品以及灰色文献。这项工作的结果不仅向国家研究人员展示了差距,而且展示了重要的趋势,为工作创造了进一步的创新机会,并向国际研究人员展示了巴西植被屋顶水文性能的可访问和地理参考的大量数据,具有尽可能高的分辨率。结果表明,半干旱气候的平均雨水截留率最高(0.79),亚热带次之(0.54 ~ 0.72),热带最低(0.55 ~ 0.69)。这项工作的结论是,在整个巴西,植被屋顶具有积极的水文性能。然而,需要进一步的工作来量化一系列改变屋顶性能的不同结构和环境因素的水文影响。报告还表明,气候,特别是巴西金融中心以外的气候,缺乏数据,因此需要进一步调查和实验研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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