Perception Studies of Vertical Greenery Systems in Singapore

Wong, Nyuk Hien; Tan, Alex Yong Kwang; Tan, Puay Yok; Sia, Angelia; Wong, Ngian Chung

doi:10.1061/(asce)up.1943-5444.0000034

Cited by 102 publications

(69 citation statements)

References 15 publications

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“…In addition, there are many advantages for the environment, ranging from increasing the thermal insulation of the building envelope and reduction of urban heat island effects [127][128][129][130][131][132][133][134][135], acting as a buffer for storm water [135][136][137][138][139][140], improving air quality and increased carbon-dioxide uptake [141][142][143], increasing urban biodiversity [144][145][146][147], providing a visually pleasant environment [148], to even crop harvesting. Also from an economical point of view, building greening seems interesting [149][150][151][152].…”

Section: Ground Treatmentmentioning

confidence: 99%

Using natural means to reduce surface transport noise during propagation outdoors

et al. 2015

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a b s t r a c tThis paper reviews ways of reducing surface transport noise by natural means. The noise abatement solutions of interest can be easily (visually) incorporated in the landscape or help with greening the (sub)urban environment. They include vegetated surfaces (applied to faces or tops of noise walls and on buildings' façades and roofs), caged piles of stones (gabions), vegetation belts (tree belts, shrub zones and hedges), earth berms and various ways of exploiting ground-surface-related effects. The ideas presented in this overview have been tested in the laboratory and/or numerically evaluated in order to assess or enhance the noise abatement they could provide. Some in-situ experiments are discussed as well. When well designed, such natural devices have the potential to abate surface transport noise, possibly by complementing and sometimes improving common (non-natural) noise reducing devices or measures. Their applicability strongly depends on the available space reserved for the noise abatement and the receiver position.

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Section: Ground Treatmentmentioning

confidence: 99%

Using natural means to reduce surface transport noise during propagation outdoors

et al. 2015

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“…In densely built-up city centers, building envelope greening is often the only possibility to meet this demand. These measures have many ecological advantages too, ranging from increasing the thermal insulation of the building envelope and reduction of urban heat island effects [1]- [9], acting as a buffer for storm water [9]- [14], improving air quality and increased carbon dioxide uptake [15]- [17], increasing urban biodiversity [18]- [22], providing a visually pleasant environment [23], to even crop harvesting. In addition, also from an economical point of view, building greening seem interesting [24]- [27].…”

Section: Introductionmentioning

confidence: 99%

The potential of building envelope greening to achieve quietness

Renterghem

Hornikx

Forssén

et al. 2013

Building and Environment

158

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Reduction of noise is one of the multiple benefits of building envelope greening measures. The potential of wall vegetation systems, green roofs, vegetated low screens at roof edges, and also combinations of such treatments, have been studied by means of combining 2D and 3D full-wave numerical methodologies. This study is concerned with road traffic noise propagation towards the traffic-free sides of inner-city buildings (courtyards). Preserving quietness at such locations has been shown before to be beneficial for the health and well-being of citizens. The results in this study show that green roofs have the highest potential to enhance quietness in courtyards. Favourable combinations of roof shape and green roofs have been identified. Vegetated façades are most efficient when applied to narrow city canyons with otherwise acoustically hard façade materials. Greening of the upper storey's in the street and (full) façades in the courtyard itself is most efficient to achieve noise reduction. Low-height roof screens were shown to be effective when multiple screens are placed, but only on conditions that their faces are absorbing. The combination of different greening measures results in a lower combined effect than when the separate effects would have been linearly added. The combination of green roofs or wall vegetation with roof screens seems most interesting.Keywords urban sound propagation, green roofs, green walls, noise reduction, numerical simulations, road traffic noise 3 1.IntroductionThe use of vegetation has become an essential aspect in urban planning nowadays. In densely built-up city centers, building envelope greening is often the only possibility to meet this demand. These measures have many ecological advantages too, ranging from increasing the thermal insulation of the building envelope and reduction of urban heat island effects [1]- [9], acting as a buffer for storm water [9]- [14], improving air quality and increased carbon dioxide uptake [15]- [17], increasing urban biodiversity [18]- [22], providing a visually pleasant environment [23], to even crop harvesting. In addition, also from an economical point of view, building greening seem interesting [24]- [27]. Recently, the noise reducing possibilities of such building envelope greening measures have been identified [28][29] [30][31] [32].The presence of mainly acoustically rigid materials in cities (streets, bricks, concrete, glazings, etc.) leads to a strong amplification of the emitted sound from road traffic noise, and large sound pressure levels are observed in city canyons. The noise problem has indeed become one of the major environmental challenges in the urban environment. The WHO report "burden of disease by environmental noise" [33] quantified the many health-related effects by long-term exposure to environmental noise. The positive influence of quiet urban areas, as a possible mitigating measure, has been shown before [34][35] [36] and has become part of European noise policy [37]. As a result, the sound environment in poten...

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“…Wong et al reported that the sound absorption coefficient of the greenery system was higher compared with other building materials and furnishings [16]. Since green wall is more efficient absorbing sound, it could be used very effectively in public places for instance restaurants, hotels, and halfway up the street to the passage of people [14].…”

Section: Acoustic Insulation Of Vertical Greenerymentioning

confidence: 99%

“…Since green wall is more efficient absorbing sound, it could be used very effectively in public places for instance restaurants, hotels, and halfway up the street to the passage of people [14]. Many factors affect the function of green wall in sound insulation, structure, materials, type, moisture content of the substrate, plant species, the screen dimensions, and the shape and location with respect to the source of the noise have an impact on the acoustic performance of vertical greenery systems [16]. Moreover, the absorption coefficient increases with increasing frequencies and with larger greenery coverage [14].…”

Section: Acoustic Insulation Of Vertical Greenerymentioning

confidence: 99%

Study Advances on Vertical Greenery System

Hou¹,

Xue

2015

Proceedings of the 2015 International Forum on Energy, Environment Science and Materials

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Abstract. For high-density urban environments, vertical greenery is often employed as one of feasible alternatives of environmental improvement. Vertical greenery systems (VGS) are being served as an interesting measure to improve the quality of life and urban environments, but only a few studies have examined overall performance of VGS. Vertical greenery has potential benefits, including reducing the surface temperature of buildings facades and diurnal temperature fluctuation, alleviating Urban Heat Island and noise pollution, reducing g heat flux to the building and energy cost, transforming the urban landscape and enhancing visual effect and so on. This paper provides a literature review for VGS studying, including VGS classification and their effects on acoustic insulation, thermal, air flow and temperature, energy performance, CO 2 sequestration and microclimatic layer.

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Perception Studies of Vertical Greenery Systems in Singapore

Cited by 102 publications

References 15 publications

Using natural means to reduce surface transport noise during propagation outdoors

Using natural means to reduce surface transport noise during propagation outdoors

The potential of building envelope greening to achieve quietness

Study Advances on Vertical Greenery System

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