The benefits of an eco-productive green roof in Bogota, Colombia

Galarza-Molina, Sandra; Torres, Andrés; Rengifo, Pervys; Puentes, Angela; Cárcamo-Hernández, Eliana; Méndez-Fajardo, Sandra; Devia, Carlos Andrés

doi:10.1177/1420326x16665896

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…For instance, Berndtsson et al (2010) report the increase in the PH of drainage waters; the work by Vijayaraghavana et al (2012) highlights that, based on USEPA standards for freshwater quality, the green roof used in this study is reasonably effective; Kok et al (2016) report increment of pH on the green roof run-off and the run-off quality ranged between class I and II under Malaysia National Water Quality Index (WQI). Other studies indicate that green cover can reduce the effect of the acid rain phenomenon, which plagues some densely urbanized areas; and helping to retain concentrations of some metals, such as Zinc as presented in a case study in Bogotá form Galarza-Molina et al, (2016) and is also in a case study from Seidl et al (2013) reports that green roofs retained over 80% of atmospheric heavy metal loads (Zn, Cu, Pb).…”

Section: Introductionmentioning

confidence: 95%

Assessing rainwater quality treated via a green roof system

Sá

Najjar

Hammad

et al. 2021

Clean Techn Environ Policy

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The shortage of water worldwide is increasingly worrying. Studies in the field suggest that sustainable water resource management via water recycling is fundamental to alleviate the issue. The use of rainwater is an important alternative source that must be considered, mainly, in the water crisis facing the planet. When integrated with the concept of green roofs, the capturing and treatment of rainwater in these structures becomes an even more ecological and sustainable practice. The water drained by the roof can be used for non-potable uses, such as flushing toilet bowls. One of the main concerns when using rainwater, even for non-potable uses, is the quality of the water available, so as not to put users' health at risk. In this way, the present work proposes to experimentally analyze the quality of rainwater drained in a green roof prototype for reuse purposes. The green roof prototype was installed on an experimental bench. After each rain event (four in total), two water samples were collected in the following situations: rainwater captured directly by a container next to the bench, and rainwater drained by the green roof prototype, captured by a container through existing drains at the base of the prototype. The analyzes of the collected samples were carried out at the Environmental Engineering Laboratory (LEMA / UFRJ) and performed according to the Standard Methods for the Examination of Water and Wastewater. Specifically, the experiments examine physicochemical and biological parameters following a rain event on a green roof prototype for sanitary use. Experimental results that were observed and analyzed include color, turbidity, pH, ammonia nitrogen, nitrite, nitrate, orthophosphate, total coliforms, and thermotolerant coliforms to indicate the rainwater quality from green roofs. The majority of parameters assessed were within the value thresholds indicated by the Brazilian standards, while the results of orthophosphate, fecal coliforms, color, and turbidity were not. The greatest divergence is in the concentration of orthophosphate, where a concentration of 10.88mg/L was obtained in this experimental study while other authors present values of 0.1 and 0.01mg/L. Total coliforms also presented high values, but within the expected range. Comparisons with technical documents and international references related to water quality to identify possibilities of the use of rainwater were also conducted. Results indicate that the water quality has the same order of quantity for turbidity, nitrite, and ammonia nitrogen parameters across the standards. Based on such observations, filtration and disinfection processes are therefore required in the green roof system for the use of rainwater for sanitary. Finally, the experimental study of rainwater quality on the green roof presented similar results comparing with international references. The use of green roofs combined with the use of rainwater demonstrates the potential and benefits as an alternative to face the water crisis.

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Section: Introductionmentioning

confidence: 95%

Assessing rainwater quality treated via a green roof system

Sá

Najjar

Hammad

et al. 2021

Clean Techn Environ Policy

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“…El análisis de los resultados de las pruebas no paramétricas permite concluir que de los factores experimentales solo el tipo de planta presentó una probabilidad de ser significativa para los coeficientes de escorrentía, en las que se destacan las suculentas (Sedum pachyphyllum) y los pensamientos (Viola x wittrockiana) con un mejor desempeño en la reducción del volumen de escorrentía y la atenuación del caudal pico, y con los resultados más bajos están la lechuga batavia (Lactuca sativa) y la mixtura de sedum. Lo anterior ratifica las conclusiones obtenidas por [6].…”

Section: Conclusionesunclassified

“…Hoy en día se reconoce que este nuevo enfoque podría impactar positivamente el desarrollo urbano al proveer abastecimiento adicional de agua, incrementar la biodiversidad y mejorar microclimas, entre otros [3]. En el marco de estos nuevos enfoques, los techos verdes se han convertido en una tendencia de la arquitectura moderna, como un elemento clave del urbanismo, muy promovido en países como Alemania, Suecia, Estados Unidos, Japón y Singapur [4], por sus amplios beneficios ambientales [5]- [6]. Los techos verdes se clasifican en intensivos, semiintensivos y extensivos.…”

Section: Introductionunclassified

Propuesta de mejoramiento tecnológico de techos verdes para el clima tropical andino

Cubillos

Galarza-Molina

Torres

2017

Cien.Ing.Neogranadina

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La gestión de riesgos por el aumento de la escorrentía superficial en zonas urbanas requiere intervención desde múltiples enfoques, ambientales, sanitarios, sociales y económicas. La infraestructura verde aporta soluciones de creciente interés por sus beneficios ambientales y potencial aprovechamiento económico. Este artículo propone un mejoramiento tecnológico para la adaptación de los techos verdes al clima tropical andino, en términos de su comportamiento hidrológico, para lo cual se desarrolló un montaje experimental con seis módulos de techos verdes extensivos y un módulo testigo (solo cubierta). El montaje experimental permitió la obtención de datos de 21 eventos de precipitación, modificando la configuración de dos factores experimentales, tipo de planta con seis variaciones y altura de sustrato con tres variaciones y tres eventos más para verificar el efecto de la variación de la pendiente de la cubierta, como tercer factor. Los datos obtenidos se procesaron para el cálculo de las variables hidrológicas de interés (precipitación, escorrentía, duración del evento, tiempo anterior seco), que expresan las características del evento y los indicadores del comportamiento hidrológico (coeficientes de escorrentía basado en volumen Cv y en el caudal pico Cp y tiempo de retraso K) y su análisis estadístico permitió identificar cuáles factores experimentales tienen o no influencia significativa en dichos indicadores. Finalmente, se desarrollaron herramientas para la simulación de variables e indicadores hidrológicos a partir de series de precipitación externas y su implementación en una herramienta de diseño que seleccione las configuraciones de techos verdes que presenten el mejor comportamiento hidrológico.

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“…In Ecuador, Jaramillo et al [27] obtained a broad list of potential native plant species for GRs in Quito using a combined approach of habitat templates and climatic envelopes, recommending the grass (Eragrostis lucida), herbs (Plantago sericea) and shrubs (Lantana canescens). In Colombia, there have been some studies on quantity and quality performances and productive potentials of GRs [28][29][30], but few on native plant selection [31]. Specifically, in Colombia's capital, Bogotá, which presents a neotropical mountain climate, GRs are becoming more and more common, and their use as part of sustainable construction initiatives is being encouraged by the local environmental authority [32].…”

Section: Introductionmentioning

confidence: 99%

Green Roof Design with Engineered Extensive Substrates and Native Species to Evaluate Stormwater Runoff and Plant Establishment in a Neotropical Mountain Climate

et al. 2020

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Green roofs are increasingly being implemented in cities for their multiple environmental benefits. Their optimal design requires an appropriate selection of components, including substrates and plant species, to ensure local sustainability in the long term. The present study seeks to assess the runoff quality and quantity of extensive green roofs located in Bogotá (Colombia). The assessment consists of testing different substrates, designed using locally available constituents and a selection of native species. The best performing substrate mixtures, in terms of runoff volume reduction and plant establishment, were jointly evaluated with three native species (i.e., Paepalanthus alpinus, Achryrocline bogotensis and Echeveria ballsii). On average, engineered substrates presented significantly lower concentrations in several water quality parameters (electric conductivity, total phosphorus, phosphates, Total Kjeldahl Nitrogen, nitrates, nitrites, color, biological oxygen demand and chemical oxygen demand) than the commercial extensive substrate used as control. The species Paepalanthus alpinus and Echeveria ballsii showed significant establishment and were considered potentially suitable species for green roofs in Bogotá. The obtained results, therefore, provide recommendations for green roof design in neotropical mountain climate conditions.

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The benefits of an eco-productive green roof in Bogota, Colombia

Cited by 10 publications

References 20 publications

Assessing rainwater quality treated via a green roof system

Assessing rainwater quality treated via a green roof system

Propuesta de mejoramiento tecnológico de techos verdes para el clima tropical andino

Green Roof Design with Engineered Extensive Substrates and Native Species to Evaluate Stormwater Runoff and Plant Establishment in a Neotropical Mountain Climate

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