Wong Nyuk Hien and Steve Kardinal Jusuf†
Published in: Architectural Science Review 2008, 51 (3), 212-220
ABSTRACT:
It is widely known that greenery has positive impacts to the environment. It is necessary to consider greenery as an important element in any contemporary urban planning. However, planners, estate managers and property managers are not able to asses existing greenery conditions in terms of quantitative data in order to achieve their goals in maintaining or improving the greenery condition. Thus, it is impossible to set a framework or plan to improve the environmental quality. The objective of this research is to develop a framework for planners to evaluate and to improve the greenery conditions in planning the urban environment.
Keywords: GIS, Greenery mapping framework, Greenery condition assessment, Planning, Urban environments
Friday, April 18, 2008
STUDY OF ROOF GARDENS IN NUS
Wong Nyuk Hien, Lin Huimin, Nedyomukti* & Steve Kardinal Jusuf
2nd Building Research Student Network Symposium, National University of Singapore, Singapore.
28 March 2007
ABSTRACT:
Singapore has undergone rapid urbanization. Study shows that the huge concentration of thermal mass (building) contributes to environmental problems such as the Urban Heat Island (UHI) Effect. Heat accumulated within the urban landscape during the day is released at night resulting in higher night temperatures than normal. As the temperature in an urban area rises, more cooling energy is needed to maintain comfort levels in building structures. In addition, the UHI effect is compounded by air pollution, which reduces night-time terrestrial radiation, and by the low humidity which results from the lack of vegetation. A heat island is developed during calm conditions; winds disperse heat.
The object study of this research is inside the premises of National University of Singapore (NUS). With the introduction of new buildings to NUS Master Plan 2005, it might lead to the development of UHI. Urban greenery, such as planting of grass, trees, and shrubs could minimize the impact of the UHI effect. The potential of roof gardens within the campus was quantified and studied to further improve the urban greenery. The aim of this research seeks to study the way greenery helps in mitigating the UHI effect and determine the direct and indirect effects of the two types of rooftop garden (intensive type and extensive type).
Keywords: urban greenery, roof garden, NUS
2nd Building Research Student Network Symposium, National University of Singapore, Singapore.
28 March 2007
ABSTRACT:
Singapore has undergone rapid urbanization. Study shows that the huge concentration of thermal mass (building) contributes to environmental problems such as the Urban Heat Island (UHI) Effect. Heat accumulated within the urban landscape during the day is released at night resulting in higher night temperatures than normal. As the temperature in an urban area rises, more cooling energy is needed to maintain comfort levels in building structures. In addition, the UHI effect is compounded by air pollution, which reduces night-time terrestrial radiation, and by the low humidity which results from the lack of vegetation. A heat island is developed during calm conditions; winds disperse heat.
The object study of this research is inside the premises of National University of Singapore (NUS). With the introduction of new buildings to NUS Master Plan 2005, it might lead to the development of UHI. Urban greenery, such as planting of grass, trees, and shrubs could minimize the impact of the UHI effect. The potential of roof gardens within the campus was quantified and studied to further improve the urban greenery. The aim of this research seeks to study the way greenery helps in mitigating the UHI effect and determine the direct and indirect effects of the two types of rooftop garden (intensive type and extensive type).
Keywords: urban greenery, roof garden, NUS
STUDY OF ENVIRONMENTAL WIND PROFILE ON NEW UNIVERSITY TOWN @ WARREN
Wong Nyuk Hien, Goh Siew Ling, Steve Kardinal Jusuf* & Nedyomukti Imam Syafii
2nd Building Research Student Network Symposium, National University of Singapore, Singapore.
28 March 2007
ABSTRACT:
This research presents the adoption of wind tunnel modeling to study the environmental wind profile to enhance the performance of natural ventilation on New University Town @ Warren. Wind tunnel experiments were conducted with the use of scaled model to determine the natural ventilation performance in terms of wind velocity. The regions with low wind velocity were identified and examined.
The study also explored the impact of variations of the design parameters, which classified into four divisions, namely, openings of buildings, height of buildings, orientation of greenery and spacing between presences of greenery on environmental wind conditions. A total of eleven stages of experiments were performed in this study. The results indicated that the values of wind velocity were significantly affected by the variation of design parameters. Openings and heights of buildings in relation to prevailing wind direction can notably enhance the wind velocity. The presence of greenery in the prevailing wind direction influences the magnitude of wind velocity by producing shielding effect, which can be proven to serve as an effective windbreak. Furthermore, tree spacing played a part in modifying the wind velocity. As trees spacing increased, the values of wind velocity increased.
Keywords: wind profile, wind tunnel study, New University Town @ Warren
2nd Building Research Student Network Symposium, National University of Singapore, Singapore.
28 March 2007
ABSTRACT:
This research presents the adoption of wind tunnel modeling to study the environmental wind profile to enhance the performance of natural ventilation on New University Town @ Warren. Wind tunnel experiments were conducted with the use of scaled model to determine the natural ventilation performance in terms of wind velocity. The regions with low wind velocity were identified and examined.
The study also explored the impact of variations of the design parameters, which classified into four divisions, namely, openings of buildings, height of buildings, orientation of greenery and spacing between presences of greenery on environmental wind conditions. A total of eleven stages of experiments were performed in this study. The results indicated that the values of wind velocity were significantly affected by the variation of design parameters. Openings and heights of buildings in relation to prevailing wind direction can notably enhance the wind velocity. The presence of greenery in the prevailing wind direction influences the magnitude of wind velocity by producing shielding effect, which can be proven to serve as an effective windbreak. Furthermore, tree spacing played a part in modifying the wind velocity. As trees spacing increased, the values of wind velocity increased.
Keywords: wind profile, wind tunnel study, New University Town @ Warren
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