Urban heat island development and changes in three large cities of Bangladesh.

Authors: Israt Jahan*, University of Delaware, Tracy DeLiberty, University of Delaware
Topics: Remote Sensing
Keywords: Urban Heat Island (UHI), Land Surface Temperature (LST), Bangladesh
Session Type: Paper
Day: 4/3/2019
Start / End Time: 12:40 PM / 2:20 PM
Room: Washington 2, Marriott, Exhibition Level
Presentation File: No File Uploaded


Bangladesh is the most densely populated developing country in the World. The cities in Bangladesh are experiencing rapid urbanization with unplanned development, putting threat to human welfare and leading to environmental degradation. Climate change is also threatening the livability of the urbanized areas. Several studies have addressed the land cover changes and their impacts on Land Surface Temperature (LST) for the major cities in Bangladesh, although no study has examined the Urban Heat Island (UHI) from a comparative geography perspective of urban versus rural dynamics in the three significant cities – Dhaka, Chittagong, and Sylhet. Dhaka is a mega city and declared the second least livable city among the 140 cities in the world according to the Global Livability Report compiled by the Economist Intelligence Unit (EIU). If the current trend of expansion in built up area continues, the entire Dhaka metropolitan area will be an UHI by 2029. Chittagong is the second largest city of the country, and comparatively, Sylhet is less developed urban area. These three cities are different in characteristics including population density, land use pattern, topography, weather and other environmental factors. Each city has long term land use plans to control future development, but most often the plans fail to implement. This study identifies the land cover change pattern for these three cities, investigate their impacts on satellite-derived LST, and the development of UHI over the last 30 years.

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