Stormwater retention performance of green roofs with various configurations in different climatic zones

Yan, Jing; Shou-hong, Zhang; Zhang, Jianjun; Zhang, Sunxun; Zhang, Chengyu; Yang, Hang; Wang, Ren-Zhong-Yuan; Wei, Liang-Yi

doi:10.1016/j.jenvman.2022.115447

Cited by 23 publications

(5 citation statements)

References 41 publications

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“…Though the primary focus of this study was to determine the amount and location of green roofs needed to reduce flooding in the study area, green roof type (extensive, semi-intensive, and intensive) impacts how they manage stormwater [ 53 , 54 ]. The ‘Urban Parkland/Open Space’ land cover classification was used in this study as a proxy for green roofs; however, more specific land cover classifications for green roofs based on their soil depths and planting communities would improve the accuracy of the results for stormwater retention and evapotranspiration [ 55 ]. Though the land cover file was altered to include green roofs, the gridded annual evaporation raster could not be altered in a similar way, which may have resulted in some inaccuracies.…”

Section: Discussionmentioning

confidence: 99%

Urban Biomimicry for Flood Mitigation Using an Ecosystem Service Assessment Tool in Central Wellington, New Zealand

et al. 2022

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Many cities are vulnerable to flooding due to their high proportion of impervious surfaces and lack of vegetated land cover. This vulnerability will often be exacerbated by changing rainfall and storm patterns due to climate change. Using the principles of urban biomimicry, this study aims to show an ecosystem service-based approach to designing an urban green infrastructure network for stormwater management in densely built areas that more closely emulates natural hydrology processes. Nature Braid (next-generation LUCI) is an ecosystem services assessment tool that was used to simulate flood mitigation ecosystem services in a 13.7 km2 urban water catchment in Wellington, Aotearoa New Zealand. The simulation results revealed that 59% of the catchment does not contain or benefit from flood-mitigating land cover features. Adding 0.6 km2 (4% of the catchment) of green roofs alongside major stormwater flow paths resulted in a nearly three-fold decrease (11%) in the unmitigated flooding area. These results suggest that green roofs could help manage stormwater and mitigate flooding in the densely built areas of the catchment. Using ecosystem service assessment tools, like Nature Braid, can inform the design of more regenerative and resilient urban green infrastructure networks that help mitigate climate change impacts on urban residents.

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Section: Discussionmentioning

confidence: 99%

Urban Biomimicry for Flood Mitigation Using an Ecosystem Service Assessment Tool in Central Wellington, New Zealand

et al. 2022

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“…The sensible heat flux is related to the temperature difference and V a . The latent heat flux is related to the water vapor partial pressure difference and V a , which are modeled in this study as a function of the convective heat transfer coefficient, CHTC (W m −2 K −1 ) [66], and the evapotranspiration moisture flux rate, E (kg m −2 s −1 ) [67], respectively, with the mean values from the related studies [8,61,[68][69][70][71][72]. Surface temperatures were not measured by the equipment but by observing the near-surface air temperature as the initial surface temperature.…”

Section: Transfer Of Heat and Moisturementioning

confidence: 99%

Optimization of Landscape Spatial Configuration and Form for Thermal Comfort: A Case Study of Urban Square, Shanghai

Ma,

Chen,

Gao

et al. 2023

Atmosphere

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Outdoor public spaces that provide a comfortable microclimate significantly contribute to urban livability. However, more elaborate investigations are needed to enhance the research-based design of landscape spatial form for optimal thermal comfort performance. This study aimed to optimize the morphological design of urban squares considering summer and winter microclimates by integrating multiple landscape elements of vegetation, waterbodies, buildings, and ground. The built environment microclimate simulation and validation of multi-physics coupling were conducted for thermal comfort, planar heterogeneity diagramming, and spatial typology identification. Further, research through design (RtD) was applied to reconstruct various spatial configurations and orientation forms to compare the relative thermal comfort areas of these geometrical prototypes in the target time period and square core zone. Among the landscape types, two identified spatial types for achieving better thermal comfort are the opening of a windward enclosure structure (ECS) that draws wind into the square in summer and an ECS without a windward opening that creates a more extended wind protection area in winter. Moreover, results of RtD show that the prototype with the smallest orientation angle to the prevailing wind direction has the most optimized thermal comfort during summer, while the form with a smaller angle to the prevailing wind direction is more favorable in winter. These findings provide methodological guidance for climate-adapted landscape square form optimization.

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“…Studies by different authors have also confirmed that factors such as soil type and depth, roof type and slope, local climate and previous precipitation, and vegetation type are the main factors influencing rainwater flow path [ 28 , [33] , [34] , [35] ]. Green roof rainwater retention performance is primarily connected to design configuration and climate, and configuration modification may increase green roof rainwater retention performance [ 36 , 37 ]. Sims, Andrew W. et al found that dry climates had better retention, but mild and humid climates still had significant performance by examining the retention performance of green roofs in three different climates: humid continental, semi-arid continental, and humid oceanic [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

Green roof development knowledge map: A review of visual analysis using CiteSpace and VOSviewer

Li,

Xiang,

Yang

et al. 2024

Heliyon

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Stormwater retention performance of green roofs with various configurations in different climatic zones

Cited by 23 publications

References 41 publications

Urban Biomimicry for Flood Mitigation Using an Ecosystem Service Assessment Tool in Central Wellington, New Zealand

Urban Biomimicry for Flood Mitigation Using an Ecosystem Service Assessment Tool in Central Wellington, New Zealand

Optimization of Landscape Spatial Configuration and Form for Thermal Comfort: A Case Study of Urban Square, Shanghai

Green roof development knowledge map: A review of visual analysis using CiteSpace and VOSviewer

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