Green Roof: An Approach to Repair the Climate of Dhaka City

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Abstract Summary
Dhaka, the capital of Bangladesh, looks no better than a piece of hardscape from aerial view which justifies the swelling concern of replacing green areas with built-up areas to fulfill the demand of briskly growing urban population. Increasing air temperature, changing rainfall pattern and ‘unhealthy’ air bears the proof of Dhaka city being an ‘Urban Heat Island’ (UHI) created by the ongoing development trend. Irreparable damage has already been done to the green spaces of this city which has turned this city as the ‘most polluted city’ in the world. At the edge of the collapse of sustainability of this city new approaches such as ‘green roofing’ can be used to repair its climate. Although roof gardening has been a traditional concept in Bangladesh, in city-wide scale a very few buildings can be seen with green space in roof or balconies. This concept is an emerging concept in worldwide and still has not made its mandatory place in national building code of Bangladesh. A handful number of architects have successfully implemented this approach in their few projects, but to the mass people, this approach is not yet popular due to lack of proper incentives, facilities, and encouragement from the government. This study employs satellite and GIS technology to identify the buildings with and without the green roof and present the hardscape to softscape ratio of the city. ‘A’ type questionnaire survey is conducted to the identified green roof user category to understand about their inspirations, benefits, and challenges of the green roof. ‘B’ type questionnaire survey figures out the factors hold people from developing green roof by surveying the identified non user category. This study involves the opinion from relevant Experts on strategic steps required to implement the green roof approach in the city scale. This study finds out the gap between the user and government on green roof perspective and recommends measures that can be done from both user and government side to make this approach successful. This study also gives an idea of how the city’s environment will be benefited from the green roof approach.
Abstract ID :
ISO314
Submission Type
Full paper :
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Lecturer
,
Rajshahi University of Engineering and Technology
Architect
,
RAJUK
Lecturer
,
Rajshahi University of Engineering and Technology
Urban Planner
,
Development Design Consultants Limited

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