Vegetation Change Detection of Khagrachhari Sadar Upazila Using GIS and Remote Sensing

The change of vegetation in Khagrachhari Sadar Upazila during 1991 to 2021 was investigated taking data 10 years intervals. Satellite images Landsat 4-5 TM (30 October 1991, 19 March 2001 and 11 February 2011) 8 OLI/TIRS (6 2021) from USGS Earth Explorer have been extracted. Image classification, analyzing visualizing the accomplished by ArcGIS 10.7.1 software Microsoft excel. In coverage (Forest agriculture) non-vegetated area (water body, bare land) were 161.15 km2 (61.19%) 99.17 (38.09%), respectively. After (in 2001) slightly increased (by 0.83%) resulting a little decrease nonvegetated area. became 184.63 (62.60%) 97.28 (37.40%), respectively for vegetated coverage. However, since 2011 decreasing trend observed, 161.81 (62.2%) which decreased 157.97 (60.72%) 2021. Consequently 98.34 (37.80%) 102.18 (39.28%) this period. overall loss 3.18 over last 30 mainly due rapid growth population encroachment hilly settlement. This is affecting ecological balance areas Bangladesh. J. Biodivers. Conserv. Bioresour. Manag. 2022, 8(2): 103-108