Telhado verde: uma alternativa sustentável para a gestão das águas pluviais

Tassi, Rutinéia; Tassinari, Lucas Camargo da Silva; Allasia, Daniel; Persch, Cristiano Gabriel

doi:10.1590/s1678-86212014000100012

Cited by 38 publications

(28 citation statements)

References 10 publications

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“…Hegi et. Plantas do gênero Sedum já são empregadas mundialmente em telhados verdes extensivos, por possuírem alta tolerância ao estresse hídrico e, consequentemente, sobreviver a condições restritivas, além de apresentarem adaptabilidade às condições climáticas locais (Jobim, 2013;Lorenzini Neto, 2014;Tassi et al, 2014).…”

Section: Figuraunclassified

Avaliação de escoamento pluvial em módulos de telhados verdes com diferentes substratos

et al. 2019

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ResumoA substituição de coberturas impermeáveis por coberturas verdes têm apresentado-se como uma alternativa ambientalmente adequada para a redução do escoamento superficial das águas da chuva. Nesse sentido, essa pesquisa avaliou a eficiência da composição do substrato de telhados verdes na redução do escoamento pluvial. Para tanto, foi realizado o monitoramento de eventos de chuva e vazão, considerando 40 sistemas experimentais (10 tratamentos, com 4 repetições em cada) de telhados verdes modulares, compostos por solo puro, substrato comercial puro e pela combinação de diferentes substratos: casca de arroz carbonizada, casca de arroz in natura e solo. Não houve diferença estatisticamente significativa na taxa de retenção média entre os tratamentos avaliados. Apesar disso, verificou-se que todos os tratamentos testados apresentaram taxa média de retenção do escoamento pluvial igual a 74%, o que demonstra o potencial de utilização de resíduos como a casca de arroz na composição de substratos para telhados verdes, visto seu custo ser mais baixo que o custo de substratos comerciais, devido às suas propriedades como leveza, porosidade e boa drenagem, além de constituir-se em uma alternativa ambientalmente adequada para a destinação desse passivo ambiental. Palavras-chave: Casca de arroz, Sedum rupestre, taxa de retenção. AbstractThe replacement of impermeable coverings by green cover has been presented as an environmentally adequate alternative for the reduction of surface runoff from rainwater. In this sense this research evaluated the efficiency of the substrate composition of green roofs in the reduction of rainfall. Rainfall and flow events were monitored, considering 40 experimental systems (10 treatments, with 4 replications each) of modular green roofs, composed of pure soil, pure commercial substrate and by the combination of different substrates: carbonized rice husks, in natura rice husks and soil. There was no statistically significant difference in the mean retention rate among the evaluated treatments. Nevertheless, it was verified that all treatments tested presented a mean retention rate of the rainfall of 74%, which demonstrates the potential of using residues such as rice husks in the composition of substrates for green roofs, since its cost is lower than the cost of commercial substrates, due to its properties such as lightness, porosity and good drainage, besides being an environmentally adequate alternative for the destination of this environmental liability.

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Section: Figuraunclassified

Avaliação de escoamento pluvial em módulos de telhados verdes com diferentes substratos

et al. 2019

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“…Green roofs have been evaluated in various conditions around the world, indicating that this technology adds layers of insulation, slows the flow of heat through the vegetation cover, helps in reducing the heat islands in urban areas (Terezo et al, 2014), reduces rainwater runoff (Tassi et al, 2014;Santos et al, 2013) and even provides a reduction of air pollution (Gartland, 2010). Spolek (2008) reports that green roofs show a high decrease in heat transfer compared to conventional roofs, whose conclusion was made after a short study.…”

Section: Introductionmentioning

confidence: 99%

Similitude and Thermal Performance on Non-Conventional Roofs

et al. 2018

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The objectives of this study were to evaluate the thermal comfort and the similitude between prototypes and reduced models, using non-conventional coverage with green roof and expanded clay aggregate, supported on wood frame structure. For this, were determined the Black Globe Temperature and Humidity Index (BGHI), the Human Discomfort Index (HDI), Effective Temperature (ET), Air Temperature (Tair) and Radiant Thermal Load (RTL), from March 2013 to December 2014. The results showed that there were no statistical differences to 5% significance in predicting heat indices between the prototypes and models. Observing all indexes simultaneously, it was observed that January was the month what led to the worst heat conditions, while June and July showed the worst cold conditions. It can be concluded that the use of reduced models is possible (1:2) compared to the prototype (1:1), with green roofs and expanded clay as covering element, for the prediction of thermal indexes, minimizing construction costs and use of spaces.

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“…Due to the mechanisms of infiltration or storage (or the combination of both) of stormwater at the runoff source, such devices compensate for the increased runoff resulting from the imperviousness of part of the land and aim to revert the behavior of the watershed to the pre-urbanization condition (HAMEL et al, 2013;LI et al, 2017). Examples include infiltration trenches (SOUZA, 2002), permeable pavements (CASTRO et al, 2013;BRUNO et al, 2013;TUCCI et al, 2000), green roofs (TASSI et al, 2014;LAMERA et al, 2014) and on-site reservoirs (VILLANUEVA;TASSI, 2004;COSTA JÚNIOR;BARBASSA, 2006;SILVEIRA et al, 1998;GENZ, 1994), in addition to disconnecting downspouts and impervious surfaces that direct the captured water to lawns (CARMEN et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Cost-efficiency analysis of a runoff detention reservoir with integrated hydraulic and structural dimensioning

Baptista

Paz

2018

RBRH

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In Brazil, urbanization-dominated imperviousness is prevalent, increasing the incidence and magnitude of floods. An alternative to control this impact is an on-site runoff detention reservoir. The choice of reservoir adopted should ideally combine hydraulic/hydrological and structural/economic criteria, although there is a gap in the literature regarding this type of integrated analysis. In this article, a cost-efficiency analysis is conducted to select a reservoir to control the runoff captured by a roof (4,657 m2) using the Puls method for hydraulic dimensioning and based on technical standards for the design of concrete structures. The results indicate that a decrease of approximately 3% in the theoretically ideal efficiency (100%) of the reservoir provided a 36% drop in cost. Such an alternative is more likely to become attractive and economically viable, with virtually the same benefits to the downstream stormwater drainage system. The analysis of different alternatives induced a decision between the level of control of the reservoir output and the cost that emphasized different aspects, focusing on more than the minimization of the cost or the imposition of a pre-defined control level in an arbitrary way.

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Telhado verde: uma alternativa sustentável para a gestão das águas pluviais

Cited by 38 publications

References 10 publications

Avaliação de escoamento pluvial em módulos de telhados verdes com diferentes substratos

Avaliação de escoamento pluvial em módulos de telhados verdes com diferentes substratos

Similitude and Thermal Performance on Non-Conventional Roofs

Cost-efficiency analysis of a runoff detention reservoir with integrated hydraulic and structural dimensioning

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