Loss and gain of land of Manpura island of Bhola district: An integrated approach using remote sensing and GIS

Md. Shahjahan Ali, Md. Fazlul Haque, Shah Md. Mizanur Rahman, Kazi Farhed Iqubal, Ms Nazma, Ashfaque Ahmed

Abstract


The erosion-accretion pattern in Manpura island has been depicted over a 37
years period from 1973 - 2010. Data of different years revealed that the island is
under the threat of erosion and the total area has gradually decreased from 148
to 114 Km2. Although Manpura island is under the threat of erosion, some lower
mid parts get in irregular erosion - accretion processes, where area of water
bodies has decreased up to a significant level (15 Km2) and the area of mangrove
forests have also decreased to 6 Km2. According to this study, total land loss of
Manpura island is 34 Km2 in the last 37 years and major erosion took place along
the northern shore line.


Keywords


Meghna estuary, Manpura Island, Land erosion, Mangroves, Remote sensing

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Dhaka University Journal of Biological Sciences ISSN 1021-2787 (Print) 2408-8501 (Online)