Satellite based analysis on Land-use Land-cover change at East Bokaro Coal-field, Jharkhand , Eastern India
Utkarsha RANI, Ranchi University, India
Rajeev Ranjan SHRIVASTAVA, Ranchi University, India
The earth has transformed since ages throughout the world to the service of humankind. In India explosive growth of population and their growing need has steadily increased the demand to utilize the land resources at optimum for agricultural land, mining and industrial establishment, urban expansion etc. with the expense of natural forest, grassland and wetland that had been valuable habitat of numerous species. Therefore, Land use and landcover change has become a significant issue in present scenario to study resource management and utilization. The aim of this study to detect land-use land cover change at East Bokaro Coalfield located in Bokaro District of Jharkhand, Eastern India during 1991 to 2020 using satellite images of Landsat-5 TM. And Landsat-7 ETM+. For atmospheric correction DOS method has been used and the Maximum Likelihood Algorithm of Supervised Classification has been used to generate land use and land cover maps through SCP plugin in QGIS. For the accuracy of classified land use and land cover maps, a confusion matrix & kappa coefficient was used to derive overall accuracy and results were above the minimum and acceptable threshold level. The massive changes of land use land covers are noticed on vegetation, agricultural land, culturable wasteland, unculturable barren land, mining and allied activities and waterbodies. The result reveals both increase and decrease of the different land use/ land cover classes from 1991 to 2020. The study reveals that the water body slightly increases from 2.77% in 1991 to 2.09% in 2020. Mining and allied activities area increased from 0.04% in 1991 to 0.28% in 2020. On the other hand, forest cover has decreased from 36.04% in 1991 to 30.49% in 2020 and Agricultural land steadily increased from 57.46% in 1991 to 62.21% in 2020.
Mots clés : Landsat 5TM|Landsat 7 ETM|DOS atmospheric correction|Maximum likelihood algorithm|Kappa Coefficient
A103491UR