Assessment of Urban Green Space Dynamics in Dhaka South City Corporation of Bangladesh Using Geospatial Techniques

Maliha Sanzana Misty; Muhammad Al-Amin Hoque; Sharif A. Mukul

doi:10.3390/land13091426

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Assessment of Urban Green Space Dynamics in Dhaka South City Corporation of Bangladesh Using Geospatial Techniques

Journal article

Open access

Peer reviewed

Assessment of Urban Green Space Dynamics in Dhaka South City Corporation of Bangladesh Using Geospatial Techniques

Maliha Sanzana Misty, Muhammad Al-Amin Hoque and Sharif A. Mukul

Land , Vol.13(9), pp.1-17

2024

DOI: https://doi.org/10.3390/land13091426

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Abstract

urban green space

geographic information system

remote sensing

normalized difference vegetation index

supervised classification

Dhaka

Bangladesh

Green spaces play a critical role in enhancing the urban environment, improving livability, and providing essential ecosystem services. A city should have at least 25% green space from an environmental and health point of view. However, quantitative estimation is required to assess the extent and pattern of green space changes for proper urban management. The present study aimed to identify and track the changes in urban green spaces within the Dhaka South City Corporation (DSCC) of Bangladesh over a 30-year period (i.e., 1991-2021). Geospatial techniques were utilized to analyze green space dynamics using Landsat 4-5 TM satellite images from 1991, 2001, and 2011 and Landsat 8 images from 2021. Supervised image classification techniques and Normalized Difference Vegetation Index (NDVI) analysis were performed to assess the urban green space dynamics in DSCC. The results of our study revealed a significant 36.5% reduction in vegetation cover in the DSCC area over the study period. In 1991, the green area coverage in DSCC was 46%, indicating a relatively healthy environment. By 2001, this coverage had declined sharply to 21.3%, further decreasing to 19.7% in 2011, and reaching a low of just 9.5% in 2021. The classified maps generated in the study were validated through field observations and Google Earth images. The outcomes of our study will be helpful for policymakers and city planners in developing and applying appropriate policies and plans to preserve and improve urban green spaces in DSCC in Bangladesh and other Asian megacities with high population density.

Details

Title: Assessment of Urban Green Space Dynamics in Dhaka South City Corporation of Bangladesh Using Geospatial Techniques
Authors: Maliha Sanzana Misty - Jagannath University
Muhammad Al-Amin Hoque (Corresponding Author) - Jagannath University
Sharif A. Mukul (Corresponding Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
Publication details: Land , Vol.13(9), pp.1-17
Publisher: MDPI AG
Date published: 2024
DOI: 10.3390/land13091426
ISSN: 2073-445X
Copyright note: © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Data Availability: Data sets generated during the study are available from the corresponding authors on reasonable request.
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 991067191402621
Output Type: Journal article

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Web Of Science research areas: Environmental Studies

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