Spatiotemporal Change of Urban Water Bodies in Bangladesh: A Case Study of Chittagong Metropolitan City Using Remote Sen
- PDF / 4,114,229 Bytes
- 20 Pages / 595.276 x 790.866 pts Page_size
- 29 Downloads / 187 Views
RESEARCH ARTICLE
Spatiotemporal Change of Urban Water Bodies in Bangladesh: A Case Study of Chittagong Metropolitan City Using Remote Sensing (RS) and GIS Analytic Techniques, 1989–2015 Morshed Hossan Molla1
•
Mohammad Abu Taiyeb Chowdhury1 • A. Z. Md. Zahedul Islam2
Received: 25 March 2020 / Accepted: 5 October 2020 Indian Society of Remote Sensing 2020
Abstract This is an empirical study that attempts to explore the spatiotemporal changes of Urban Water Bodies (UWBs) in the Chittagong Metropolitan City from 1989 to 2015, using Remote Sensing and Geographic Information Systems analytic techniques. More precisely, Ground Truthing, along with LandsatTM data and/OLI satellite images was collected for the years 1989, 2001, 2010 and 2015, respectively; Checklist Survey, Key Informant Interviews and observation (overt) methods were also used for conducting the study. Narrative Analysis along with statistical tools, especially SPSS (version20), was applied as well. The study reveals that nearly 1249 types of water bodies were detected by the checklist survey and ‘Ground Truthing Method’, beside 1352 types of water bodies were identified through interpretation of series satellite images in the Metropolitan area. The total number of water bodies in Chittagong City was found declining gradually, because nearly 1605, 1526, 1400 and 1352 types of water bodies were detected in 1989, 2001, 2010 and 2015 years, respectively. Although the regression analysis curve prescribed the changing pattern or decreasing rate of UWBs was * 10% which represented per year interval. Besides, the emerged and filled nature of UWBs was confused conditions. Some water bodies were emerged or excavated at southern and western edges of the coast due to soil collection for road construction and commercial fishing purposes. Besides that, many water bodies filled at every place in city area due to unplanned urbanization and industrialization, new settlement and housing, land pricing and fragmentation, unlawful encroachment and violence of Real Estate Corporation and so on. Therefore, strengthening of laws and policies and proper coordination among urban autonomous agencies will be significant to stop illegally filled of water bodies and to protect water bodies in a Chittagong Metropolitan city in Bangladesh. Keywords Urban water bodies Landsat imagery Spatiotemporal analysis Environmental sustainability Chittagong city
Introduction & Morshed Hossan Molla [email protected] Mohammad Abu Taiyeb Chowdhury [email protected] A. Z. Md. Zahedul Islam [email protected] 1
Department of Geography and Environmental Studies, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh
2
Bangladesh Space Research and Remote Sensing Organization (SPARRSO), Agargaon, Sher-e-Banglanagar, Dhaka 1207, Bangladesh
Landscape alteration has a multiplying effect on biodiversity, water quality, and carbon emissions with many other negative impacts on aquatic and terrestrial ecosystems (Rojas et al. 2013; Jianchu et al. 2005
Data Loading...
