Urbanization and green space dynamics in Greater Dhaka, Bangladesh

Green space is particularly indispensable for proper functioning of the ecosystem in an urban environment. This study was an attempt to dynamically map and monitor green spaces in Greater Dhaka of Bangladesh. Both primary and secondary data were acquired to document the spatial–temporal dynamics of...

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Main Authors: Byomkesh, Talukder, Nakagoshi, Nobukazo, Dewan, Ashraf
Format: Journal Article
Published: Springer Japan KK 2012
Subjects:
Online Access:http://hdl.handle.net/20.500.11937/3576
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author Byomkesh, Talukder
Nakagoshi, Nobukazo
Dewan, Ashraf
author_facet Byomkesh, Talukder
Nakagoshi, Nobukazo
Dewan, Ashraf
author_sort Byomkesh, Talukder
building Curtin Institutional Repository
collection Online Access
description Green space is particularly indispensable for proper functioning of the ecosystem in an urban environment. This study was an attempt to dynamically map and monitor green spaces in Greater Dhaka of Bangladesh. Both primary and secondary data were acquired to document the spatial–temporal dynamics of green spaces in the study area. Using a supervised classification algorithm, multi-temporal land use/cover data were extracted from a set of satellite images. A number of spatial metrics were employed to understand the landscape condition in a multi-temporal manner. In addition, 50 key informants along with focus group discussion and observation techniques were used to document existing management aspects of green spaces and their conservation policies. The analysis revealed that green spaces in Greater Dhaka are rapidly disappearing over the course of time even though they provide a number of natural, economic and social benefits. The disappearance of green spaces was primarily attributed to a rapid increase in the urban population, mainly driven by rural–urban migration. As a result, the landscape became highly fragmented and less connected. A substantial reduction of green patches is also leading to deterioration of the ecological condition of the landscape. The drastic reduction of green spaces in Greater Dhaka has been attributed to a lack of policy, low political motivation, and poor management. In order to ensure sustainability of green spaces and proper functioning of the city’s ecosystem, there is an urgent need for strategic green space planning.
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spelling curtin-20.500.11937-35762017-09-13T14:46:24Z Urbanization and green space dynamics in Greater Dhaka, Bangladesh Byomkesh, Talukder Nakagoshi, Nobukazo Dewan, Ashraf Green space destruction Green space benefits Remote sensing Matrix Green space Green space is particularly indispensable for proper functioning of the ecosystem in an urban environment. This study was an attempt to dynamically map and monitor green spaces in Greater Dhaka of Bangladesh. Both primary and secondary data were acquired to document the spatial–temporal dynamics of green spaces in the study area. Using a supervised classification algorithm, multi-temporal land use/cover data were extracted from a set of satellite images. A number of spatial metrics were employed to understand the landscape condition in a multi-temporal manner. In addition, 50 key informants along with focus group discussion and observation techniques were used to document existing management aspects of green spaces and their conservation policies. The analysis revealed that green spaces in Greater Dhaka are rapidly disappearing over the course of time even though they provide a number of natural, economic and social benefits. The disappearance of green spaces was primarily attributed to a rapid increase in the urban population, mainly driven by rural–urban migration. As a result, the landscape became highly fragmented and less connected. A substantial reduction of green patches is also leading to deterioration of the ecological condition of the landscape. The drastic reduction of green spaces in Greater Dhaka has been attributed to a lack of policy, low political motivation, and poor management. In order to ensure sustainability of green spaces and proper functioning of the city’s ecosystem, there is an urgent need for strategic green space planning. 2012 Journal Article http://hdl.handle.net/20.500.11937/3576 10.1007/s11355-010-0147-7 Springer Japan KK restricted
spellingShingle Green space destruction
Green space benefits
Remote sensing
Matrix
Green space
Byomkesh, Talukder
Nakagoshi, Nobukazo
Dewan, Ashraf
Urbanization and green space dynamics in Greater Dhaka, Bangladesh
title Urbanization and green space dynamics in Greater Dhaka, Bangladesh
title_full Urbanization and green space dynamics in Greater Dhaka, Bangladesh
title_fullStr Urbanization and green space dynamics in Greater Dhaka, Bangladesh
title_full_unstemmed Urbanization and green space dynamics in Greater Dhaka, Bangladesh
title_short Urbanization and green space dynamics in Greater Dhaka, Bangladesh
title_sort urbanization and green space dynamics in greater dhaka, bangladesh
topic Green space destruction
Green space benefits
Remote sensing
Matrix
Green space
url http://hdl.handle.net/20.500.11937/3576