Urban heat stress mitigation potential of green walls: A review

Koch, Kyra; Ysebaert, Tess; Denys, Siegfried; Samson, Roeland

doi:10.1016/j.ufug.2020.126843

Cited by 89 publications

(68 citation statements)

References 86 publications

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“…Additional cooling is achieved when radiation absorbed by vegetation is dissipated through transpiration from the leaves and/or evaporation from the growing medium. The surface cooling resulting from evapotranspiration is usually less than that achieved from shading; however, the process is effective at reducing ambient air temperatures on a larger scale [28]. Urban vegetation can also alter the convective boundary condition by creating a wind barrier next to a surface.…”

Section: Increased Surface Greenery/vegetation (Isg)mentioning

confidence: 99%

“…As the three categories have different constructions, their effects on building energy use, occupant thermal comfort, or UHI reduction vary. The GCS category includes Green Climbing Barrier (GCB) and Green Climbing Coating (GCC) systems where plants grow up from the ground [28], or Green Modular Coating (GMC) systems in which the plants grow from containers attached to the façade [30]. Typically, GCSs alter the thermal performance of a building by shading incoming solar radiation and creating a wind barrier that alters the exterior convective coefficients.…”

Section: Facadesmentioning

confidence: 99%

“…Typically, GCSs alter the thermal performance of a building by shading incoming solar radiation and creating a wind barrier that alters the exterior convective coefficients. Plants used in GCC and GCB systems climb a façade by directly attaching themselves to a surface or climbing a freestanding support structure or a lightweight support system attached to the structure [28]. As GCB and GCC requires little to no support, these vegetated systems can be implemented with little capital compared with other vertical greenery systems and are suited to retrofit applications.…”

Section: Facadesmentioning

confidence: 99%

“…An added benefit of GCB and GCC systems is that the vegetation can provide greater shading coverage at a faster rate compared with trees which may take between 10 and 30 years to reach their cooling potential [31]. However, several years of growth may be required in order to reach sufficient levels of coverage [28]. Alternately, GMC systems utilize planters of growing medium suspended across the façade.…”

Section: Facadesmentioning

confidence: 99%

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Nature-Based Solutions (NBSs) to Mitigate Urban Heat Island (UHI) Effects in Canadian Cities

et al. 2022

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Canada is warming at double the rate of the global average caused in part to a fast-growing population and large land transformations, where urban surfaces contribute significantly to the urban heat island (UHI) phenomenon. The federal government released the strengthened climate plan in 2020, which emphasizes using nature-based solutions (NBSs) to combat the effects of UHI phenomenon. Here, the effects of two NBSs techniques are reviewed and analysed: increasing surface greenery/vegetation (ISG) and increasing surface reflectivity (ISR). Policymakers have the challenge of selecting appropriate NBSs to meet a wide range of objectives within the urban environment and Canadian-specific knowledge of how NBSs can perform at various scales is lacking. As such, this state-of-the-art review intends to provide a snapshot of the current understanding of the benefits and risks associated with the implantation of NBSs in urban spaces as well as a review of the current techniques used to model, and evaluate the potential effectiveness of UHI under evolving climate conditions. Thus, if NBSs are to be adopted to mitigate UHI effects and extreme summertime temperatures in Canadian municipalities, an integrated, comprehensive analysis of their contributions is needed. As such, developing methods to quantify and evaluate NBSs’ performance and tools for the effective implementation of NBSs are required.

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Section: Increased Surface Greenery/vegetation (Isg)mentioning

confidence: 99%

Section: Facadesmentioning

confidence: 99%

Section: Facadesmentioning

confidence: 99%

Section: Facadesmentioning

confidence: 99%

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Nature-Based Solutions (NBSs) to Mitigate Urban Heat Island (UHI) Effects in Canadian Cities

et al. 2022

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“…In this type of VGS, the plants uptake water and nutrients directly from the soil because they are rooted there (Perez et al 2017). Creepers can be placed directly on a building's wall or on additional constructions such as cables or nets (Koch et al 2020). Supporting structures can be made of various materials, with the most popular being steel, wood, plastic, and aluminium (Perini and Ottelé 2014).…”

Section: Vertical Greening Systemsmentioning

confidence: 99%

Blue-green infrastructure as a new trend and an effective tool for water management in urban areas

Pochodyła

Glińska-Lewczuk

Jaszczak

2021

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Blue-green infrastructures (BGI) integrate solutions implemented to enhance water management and landscape values for more climateresilient and livable cities. BGI have created an opportunity to renew the natural structure of water balance in cities through the increase in rainwater retention and enlargement of permeable areas. The review of the literature on BGI development and solutions showed that the most popular BGI elements in terms of urban water quantity and quality were rain gardens, green roofs, vertical greening systems, and permeable pavements. Their structure and effectiveness were presented and reviewed. Despite the consensus between researchers that BGI benefit urban hydrology, differences in runoff decreased (2%-100%) lowering the peak flows (7%-70%) and infiltration (to 60%) or evapotranspiration (19%-84%) were reported. Due to an individual technical structure, each BGI element plays a specific role and there is no universal BGI solution against water-related problems. We inferred that the most effective ones were individually adapted solutions, which prevent from a stressor. The greater variety of solutions in a given area, the more benefits for the urban environment. Our analyses showed that a holistic and co-creative approach to create blue-green networks should be considered in modern water management plans.

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Umweltgerechtes Bauen für Mensch, Flora und Fauna am Beispiel neuer Grünfassadensysteme

Röseler,

Krause,

Leistner

et al. 2024

Bauphysik Kalender 2024

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Urban heat stress mitigation potential of green walls: A review

Cited by 89 publications

References 86 publications

Nature-Based Solutions (NBSs) to Mitigate Urban Heat Island (UHI) Effects in Canadian Cities

Nature-Based Solutions (NBSs) to Mitigate Urban Heat Island (UHI) Effects in Canadian Cities

Blue-green infrastructure as a new trend and an effective tool for water management in urban areas

Umweltgerechtes Bauen für Mensch, Flora und Fauna am Beispiel neuer Grünfassadensysteme

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