Inter-annual thermoregulation of extensive green roofs in warm and cool seasons: Plant selection matters

Sookhan, Nicholas; Margolis, Liat; MacIvor, J. Scott

doi:10.1016/j.ecoleng.2018.08.016

Cited by 13 publications

(19 citation statements)

References 64 publications

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“…However, the high-water-use efficiency of Sedum may turn out to be a drawback, as it limits the utilization of excess water [19,50] and reduces potential summer thermal benefits associated with evapotranspirative cooling [51]. Hence, in accordance with what has been reported by other authors, when selecting plants for green roofs, consideration should be given to which are the more important benefits to pursue [51,52].…”

Section: Discussionmentioning

confidence: 67%

Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context

Zanin

Bortolini

2020

Water

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Most of the services and benefits of green roofs are related to the substrate as well as the vegetation layer. Although plant selection should be made on the basis of green roof typology, morphology, and climate conditions, very often, Sedum species only are used worldwide. However, they do not always guarantee the best performances; hence, it is important to investigate different plant species and their performance in different climate contexts. Herein, an experiment was conducted using three plant mixes (i.e., a Sedum mix, a perennial herbaceous mix, and a suffruticose mix), grown in boxes containing two substrates (a volcanic substrate or a recycled crushed brick substrate) and two drainage/storage layers (a preformed layer or a mineral layer), in factorial combination. The Sedum mix showed a high canopy cover, comparable to or even higher than that of the other mixes, particularly when supplemental irrigation was stopped. However, the actual crop coefficient (Kcact) of the herbaceous and suffruticose mixes was often higher than that of the Sedum mix. The results also showed that both the substrate and the drainage/storage layer may improve Kcact values as a consequence of their capacity for stormwater retention.

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Section: Discussionmentioning

confidence: 67%

Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context

Zanin

Bortolini

2020

Water

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“…Several studies have shown the effect of plant type on temperature reduction (Lundholm et al 2010 ; MacIvor and Lundholm 2011 ; MacIvor et al 2011 ; Sookhan et al 2018 ). For the cooling effects of plants on GRs, the essential role of plants and vegetation is through evapotranspiration (Bass et al 2003 ).…”

Section: Resultsmentioning

confidence: 99%

Sustainable green roofs: a comprehensive review of influential factors

Shahmohammad

Hosseinzadeh

Dvorak

et al. 2022

Environ Sci Pollut Res

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Green roofs have gained much attention as a modern roofing surface due to their potential to deliver many environmental and social benefits. Studies have indicated that different GR designs deliver different ecosystem services, and there are important factors that affect GR performance. This article reviewed significant factors that influence GR performance and sustainability. Substrate and drainage layer material choice significantly affects stormwater retention potential, leachate quality, plant survival, and determines GR environmental footprints. Subsequently, type of plants, their form, and kinds used on GRs impact GR ecosystem function. Leaf area is the most studied trait due to its influence on the cooling potential and energy performance. In order to achieve a sustainable GR, it is essential to select the type of plants that have a high survival rate. Perennial herbs, particularly forbs and grass as dominant groups, are heat and drought tolerant, which make them suitable in GR experiment. Furthermore, selecting a suitable irrigation system is as important as two other factors for having a sustainable GR. Irrigation is essential for plant survival, and due to the current pressure on valuable water sources, it is important to select a sustainable irrigation system. This review presents three sustainable irrigation methods: (i) employing alternative water sources such as rainwater, greywater, and atmospheric water; (ii) smart irrigation and monitoring; and (iii) using adaptive materials and additives that improve GR water use. This review sheds new insights on the design of high-performance, sustainable GRs and provides guidance for the legislation of sustainable GR.

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“…However, the densely built-up area has a high-density residential environment, which means the space for GI is quite limited. Thus, based on the premise of determining the proportion of the GI area, the three-dimensional green capacity of the specific space could be increased, such as replacing the traditional single-plane greening model with a three-dimensional greening layout model (Duncan et al, 2019;Sookhan et al, 2018). For the green belt, forest and grassland patches should be guaranteed to be larger than 9 ha and 2.25 ha, and make them spatially aggregated, especially in areas with high topography and undulating terrain.…”

Section: Discussionmentioning

confidence: 99%

The Cooling Intensity Dependent on Landscape Complexity of Green Infrastructure in the Metropolitan Area

Wang

Huang

Chen

et al. 2021

Journal of Environmental Engineering and Landscape Management

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The cooling effect of green infrastructure (GI) is becoming a hot topic on mitigating the urban heat island (UHI) effect. Alterations to the green space are a viable solution for reducing land surface temperature (LST), yet few studies provide specific guidance for landscape planning adapted to the different regions. This paper proposed and defined the landscape complexity and the threshold value of cooling effect (TVoE). Results find that: (1) GI provides a better cooling effect in the densely built-up area than the green belt; (2) GI with a simple form, aggregated configuration, and low patch density had a better cooling intensity; (3) In the densely built-up area, TVoE of the forest area is 4.5 ha, while in the green belt, TVoE of the forest and grassland area is 9 ha and 2.25 ha. These conclusions will help the planners to reduce LST effectively, and employ environmentally sustainable planning.

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Inter-annual thermoregulation of extensive green roofs in warm and cool seasons: Plant selection matters

Cited by 13 publications

References 64 publications

Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context

Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context

Sustainable green roofs: a comprehensive review of influential factors

The Cooling Intensity Dependent on Landscape Complexity of Green Infrastructure in the Metropolitan Area

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