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International Journal of Physical and Social Sciences
Year : 2014, Volume : 4, Issue : 4
First page : ( 361) Last page : ( 373)
Online ISSN : 2249-5894.

Landuse change monitoring of Banshkhali coastal areas using toposheet data and satellite imageries (1988–2010): A geoinformatics approach

Sultana Taj, Nath Biswajit

Assistant Professor, Department of Geography and Environmental Studies, Faculty of Biological Sciences, University of Chittagong, Chittagong-4331, Bangladesh

Online published on 5 June, 2014.

Abstract

Land use refers to man's activities and the varied uses which are carried on over land. The knowledge of land use changes is very important in understanding natural resources, their utilization, conservation and management uses. Remote sensing satellite data provides a synoptic view of the coastal zones. The modern scientific technologies of remote sensing and digital image processing are extremely useful in periodic assessment of the coastal LULC changes and analyze them to formulate better management. The coastal areas adjacent to Banshkhali in the south of Chittagong, Bangladesh are facing the problem of land use changes due to different types of disaster i.e., cyclone, tidal surge, saline water intrusion, etc. For the detection of land use category in 1988 and in 1999 and 2010, Toposheet from Survey of Bangladesh and Landsat TM satellite imageries are used respectively. Supervised image classification based on maximum likelihood classifier method was applied for the two years 1999 and 2010 and digitization was performed on 1988 toposheet respectively to identify different categories of land use. The Banshkhali coastal zone changes during the past 22 years mainly due to anthropogenic, and different types of disasters. The prepared land use map shows the major changes in the coastal land use because of high powerful destructive cyclonic events in different time period, saline water intrusion, seasonal tidal impact, river bank erosion etc. activities. The present study suggests some remedial measures to protect the Banshkhali coastal environmental changes. Proper coastal zone rules should be strictly implemented to protect the embankment and other related activities near to the coast. Proper mitigation plan should be implemented for protecting the coast from erosion.

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Keywords

Land use, Change Monitoring, Banshkhali Coast, Geoinformatics.

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