Quantitative Assessment of Land Cover Change Using Landsat Time Series Data: Case of Chunati Wildlife Sanctuary (CWS), Bangladesh

Year 2016, Volume: 3 Issue: 2, 45 - 55, 02.08.2016

Kamrul Islam Mohammed Jasimuddin Biswajit Nath Tapan Kumar Nath

https://doi.org/10.30897/ijegeo.306471

Cited By: 20

Abstract

Due to inappropriate management and absence of land use planning, land cover change of developing country
like Bangladesh is a common phenomenon. This land cover change phenomenon will have its tremendous effect
if found at a greater extent on natural habitat area for numerous animal and tree species. In this study, land cover
change of Chunati Wildlife Sanctuary (CWS) was assessed from (2005-2015) using Landsat TM (Thematic
Mapper) and Landsat 8 OLI/TIRS (Operational Land Imager/Thermal Infrared Sensor). ArcGIS v10.1 and
ERDAS Imagine v14 were used to process satellite derived imageries and assess other quantitative data for land
cover change assessment of this study area. Land cover change of the area was identified using Normalized
Difference Vegetation Index (NDVI) technique. Highest NDVI value was found in 2005 (0.71) which denotes
presence of moderate-high vegetation cover at that time period. After 2005, highest NDVI value was found
following a decreasing trend (0.56 in 2010 and 0.4 in 2015) which clearly represents the rapid vegetation cover
change in the study area. Almost 7608 hectares of moderate to high density natural forest cover dominated the
area during 2005 but was totally absent in 2015 which may be considered as a great threat regarding proper
ecosystem functioning of CWS. From the findings of this research, it can be easily concluded that the sanctuary
area has lost its valuable land cover both qualitatively and quantitatively.

Keywords

Land Cover Change, Remote Sensing, NDVI, Chunati Wildlife Sanctuary, Landsat Satellite Imagery

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