Gangasagar coast of Sagar Island which lies in the Ganga delta is dynamic in nature where coastal processes play a significant role. Analysis of shoreline configuration from the year 1969 to 2009 indicates that shoreline has been retreated. Assessment of vulnerability has been done taking on six geological and physical variables namely geomorphology, sea-level rise rate, coastal slope; shoreline erosion rate, mean wave height and mean tide range. Coastal vulnerable index values vary location wise. In general, CVI values are very high to high in the western sector. In the eastern sector values are moderate to low. In the south western most part, the value is very high where the coast (near Beguakhali) has been substantially eroded which is evident from the observation that older light house now stands in the sea at about 100 m from the coastline.

中文翻译：

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西孟加拉邦萨加尔岛沿岸关于淹没危害的脆弱性评估

位于恒河三角洲的萨加尔岛的Gangasagar海岸自然是动态的，沿海过程起着重要作用。对1969年至2009年海岸线构造的分析表明，海岸线已退缩。对脆弱性的评估考虑了六个地质和物理变量，即地貌，海平面上升率，沿海坡度；海岸线侵蚀率，平均浪高和平均潮汐范围。沿海脆弱指数值因地区而异。总体而言，西方地区的CVI值非常高。在东部地区，价格适中至较低。在西南部的大部分地区，海岸（Beguakhali附近）遭到严重侵蚀的地区的价值非常高，这从观察到的证据可以看出，老式灯塔现在位于距离海岸线约100 m的海中。