r esearch and Planning Studies C ategory (Finalist) - The ...

Research and Planning Studies Category (Finalist)
Green Roofs for Old District Buildings: Suitability, Cost and Benefit
舊 區 樓 宇 植 物 天 台 : 應 用 , 成 本 與 效 益
Estimated Completion Date 2008 Research Investigator The Hong Kong Polytechnic University (Applicant)
Facility Manager
Management Company
Owners Association
Other Team Member
The Hong Kong Polytechnic University
The Hong Kong Polytechnic Univeristy
Baptist Oi Kwan Social Services
Ryerson University
Hong Kong, like many other highly urbanized cities, is facing severe
air quality problems and elevated temperature in the summer time.
While environmental regulations in Hong Kong control local emission
of particulates and other air pollutants, it is still a challenge to control
regional transport of polluted air from neighbouring cities. Greening
of roof areas will improve air quality by trapping airborne particulates
and other air pollutants with vegetation. The elevated temperature in
the summer time is due to the heat trapped by impervious asphalt and
concrete surfaces. By releasing heat through evapo-transpiration and
reflecting solar radiation, green roofs will reduce ambient temperature.
While the benefits of greenroof (e.g. air quality improvement, energy
savings, reduction of greenhouse gases, heat island effect, and
stormwater, extension of building membrane life, noise reduction,
urban ecology, aesthetic benefits, and food production) have been
recognized and their adoption is becoming widespread in Europe,
North America and Japan, this green technology remains relatively
unexploited in Hong Kong. A pilot research study has been carried out
by The Hong Kong Polytechnic University, in collaboration with Baptist
Oi Kwan Social Service at Wan Chai and Ryerson University in Canada, to
demonstrate and promote the green roof technology.
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