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Shoreline Change Detection and Analysis of the Coastal Area of Bangladesh Using Remote Sensing Technology

Abstract: Being a low lying deltaic country, the morphological changes of the coastal zones of Bangladesh become a major social, economic and environmental concern. In this study, images of Landsat satellite during 1973-2010 were analyzed to observe the morphological condition as well as to detect the variation of shoreline movement by using Erdas Imagine 9.1. From the present study it was seen that in the Western Part of the coast in 2010, Katka moved forward to 1 km where as the Tiger Points moved forward 3.5 km towards the Bay of Bengal. In the Central part of the coast in 2010, Hatiya Island moved forward to 5.14 km towards the Bay of Bengal where as the Laldia exerts backward movement towards the landward to 3.5 km. The Kuakata Beach also moved backward towards the land about 0.5 km. In the Eastern region, Sandwip Island moved backward to 3.68 km towards the landward where as the Kutubdia Island moved backward to 0.22 km toward the landwards and Moheskhali Island forward movement toward the sea is 2.5 km. From above, it is observed that western part is less stable than central part.  Water body is increasing due to erosion and water logging in the central part. So erosion, accretion and water logging has observed higher in 2010 than 1973. On the other hand, eastern part is more stable due to hilly region.

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