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160Component A.1 – Prevention of coastal erosion around Sagar Island151. In case of Sagar Island, recent observations by John Pethick (2008) suggest that fourmajor areas of erosion are present: in the north east (Kuchuberia); the south east centre;Dublat on the south coast, and Beguakhali on the south coast. In contrast to these erosionalareas, the remainder of the Island appears to be accreting. Large areas of recently developedmangrove and salt marsh are present on both east and west coasts and a substantial area ofaccretion was observed in the centre of the south coast east of Sagar Mela ground. Moreoverboth the south and west coasts of the Island have wide intertidal areas with sedimentconsisting mainly of fine sand. Sand accretion on the north-east coast is particularly rapidalthough, further north, the island of Ghoramara, that was formerly accreting, is reported tohave eroded significantly over the past few years. In order to plan strengthening of anyexisting remedial measures and to bring in new remedial measures in both the areas, athorough understanding of the coastal processes is required.152. The erosion-accretion pattern in the Sundarban coastal zone has probably been madeover-simplified because of the scale of investigation and reliance on only archived map andimagery data. Detailed picture may be exemplified by observations made in 2008 in SagarIsland.Figure 12: Major embankment erosion sites on Sagar Island. Ghoramara Island is anaccretional site included for identification purposes (Pethick, 2008).