Wetlands are an effective green roof system

Song, Uhram; Kim, Euijae; Bang, Jeong Hwan; Son, Deok Joo; Waldman, Bruce; Lee, Eun Ju

doi:10.1016/j.buildenv.2013.04.024

Cited by 45 publications

(26 citation statements)

References 25 publications

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“…6). Also, some authors have argued that wetland-like systems could be a practical alternative under some conditions (Song et al 2013). More commonly, a number of adjustments have been made to the basic engineered substrate design in order to attain specific performance goals or in response to environmental constrains.…”

Section: Substrate Designmentioning

confidence: 99%

Water Through Green Roofs

Lambrinos

2015

Ecological Studies

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How green roofs process water is a critical component of their function and effective management. As green roof technology has spread from northern Europe's relatively cool and humid climate, green roof designs have had to adapt to regional variations in the timing and availability of water. The development of regionally appropriate designs requires a mechanistic understanding of green roof water relations, plant eco-physiology and irrigation technology. Emerging designs effectively match environmental conditions, substrate characteristics, plant physiological traits, plant community interactions, and expert systems for applying supplemental water.Keywords Evapotranspiration · Hydrology · Irrigation · Plant selection · Plant water use strategies · Xeric climates Green Roofs as Hydrological SystemsThe vast majority of the water that lands on a conventional roof quickly flows off. In sharp contrast, water that lands on a green roof enters a complex hydrological system (Fig. 4.1). Stocks of water are held on and within plants, in substrate, and in various layered materials such as drainage and water retention fabrics. Water exits the system through evaporation from the substrate and plant surfaces, transpiration, and runoff. The magnitude of the various stocks of water as well as the flux of water between stocks and out of the system is governed by complex interactions among green roof components and the physical environment. This complexity makes green roof performance inherently dynamic and contingent on the details of system design and local conditions (Berndtsson 2010).Nevertheless, most extensive green roofs share broadly similar hydrological characteristics. The bulk of the standing stock of water on a green roof is held in the substrate. The amount of water intercepted and held by vegetation is comparatively

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Section: Substrate Designmentioning

confidence: 99%

Water Through Green Roofs

Lambrinos

2015

Ecological Studies

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“…One cement board without any tank was exposed directly to the sunlight to simulate a bare rooftop as a control ( Figure 2). The experiment tanks were approximately the same size as those used in the studies of Song et al [31], and Huang et al [32]. Fifteen dormitory rooms were located directly under the bare rooftop.…”

Section: Experimental Designmentioning

confidence: 99%

Using Edible Plant and Lightweight Expanded Clay Aggregate (LECA) to Strengthen the Thermal Performance of Extensive Green Roofs in Subtropical Urban Areas

2019

Energies

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Gazing at natural landscapes and participating in agricultural activities can elicit psychophysiological restoration. However, most buildings are constructed merely to meet the minimum legal requirements for structure weight load. Extensive green roofs consisting of vegetables and a lightweight growth medium can be designed to provide not only passive-cooling effects on bare rooftops, but also to convert idle rooftops into temporary retreats for stressed individuals. The purpose of this study is to both measure the surface temperature reduction and heat amplitude reduction of a bare rooftop using the extensive green roofs containing a lightweight expanded clay aggregate (LECA) and Ipomoea batata as well as conduct a weight-reduction-and-cost analysis to measure the weight loss of the extensive green roofs incurred through LECA replacement. A four-stage field experiment was performed on the flat rooftop of a dormitory in a subtropical climate during summer. The results indicated that roofs with Ipomoea batata had a significantly higher passive-cooling effect than did roofs without Ipomoea batata. The roofs with 10%–40% LECA exhibited a slightly higher passive-cooling effect than did roofs with conventional garden soil. At a slightly different average air temperature (0.56 °C; i.e., 32.04 °C minus 31.48 °C), the combined effects of LECA and Ipomoea batata helped to significantly reduce the average temperature of the bare rooftop by an additional 10.19 °C, namely, temperature reduction of the bare rooftop increased from 9.54 °C under a roof with 0% LECA and without plants in the second stage to 19.73 °C under a roof with 10% LECA and with plants in the fourth stage.

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“…Berndtsson (2010). Continued research in the field has yielded published works from various researchers including Carson et al (2013), Fassman-Beck et al (2013), Rosatto et al (2013), Song et al (2013) …”

Section: Water Outputs: Outflow Quantitymentioning

confidence: 99%

“…3) can be monitored by various techniques or by backing out the term in the energy balance if all other parameters are known. Studies evaluating energy balance and latent heat fluxes related to green roofs include Jim and He (2010), Susca et al (2011), Coutts et al (2013, Kim and Park (2013), Nagengast (2013), Peng and Jim (2013) and Song et al (2013).…”

Section: Surface Energy Balancementioning

confidence: 99%

Green Roof Ecosystems

Sutton¹

2015

Ecological Studies

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Ecological Studies is Springer's premier book series treating all aspects of ecology. These volumes, either authored or edited collections, appear several times each year. They are intended to analyze and synthesize our understanding of natural and managed ecosystems and their constituent organisms and resources at different scales from the biosphere to communities, populations, individual organisms and molecular interactions. Many volumes constitute case studies illustrating and synthesizing ecological principles for an intended audience of scientists, students, environmental managers and policy experts. Recent volumes address biodiversity, global change, landscape ecology, air pollution, ecosystem analysis, microbial ecology, ecophysiology and molecular ecology.More information about this series at

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Wetlands are an effective green roof system

Cited by 45 publications

References 25 publications

Water Through Green Roofs

Water Through Green Roofs

Using Edible Plant and Lightweight Expanded Clay Aggregate (LECA) to Strengthen the Thermal Performance of Extensive Green Roofs in Subtropical Urban Areas

Green Roof Ecosystems

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