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Evaluation of Vegetation density of the Mangrove forest in South Andaman Island using Remote Sensing and GIS techniques

Author Affiliations

  • 1 Department of Disaster Management, Pondicherry University, Port Blair, INDIA

Int. Res. J. Environment Sci., Volume 3, Issue (8), Pages 19-25, August,22 (2014)


The gregarious distribution of mangroves forms the habitat on the large extent in the coastline of Andaman Islands. Southern part of South Andaman Island was taken for this study where the mangroves are threatened by anthropogenic activities and natural calamities. Remote Sensing and GIS techniques were used to evaluate the vegetation density of mangrove forest in this area. The LISS IV satellite image was used to map the mangrove forest using visual interpretation technique. Mangroves were delineated from the inland forest cover and other land cover features. NDVI method was used to evaluate the forest density cover of mangroves. Based on the canopy cover percentage it was classified into dense, moderate, sparse and degraded forest. The total mangrove canopy cover occupies 1842.89 ha which is 74.5% of total area of the mangrove forest, nearly 54.11% of canopy comes under moderate vegetation of mangroves and it occupies maximum of the mangrove forest in this island. Whereas dense vegetation occupies 283.10 ha indicating fine health status of the forest. Sparse forest occupies around 501.34 ha indicates the encroachment activities in this forest. Degraded vegetation was observed in the urban landuse and tsunami impacted areas that occupies around 101.40 ha were confirmed in the field survey. This preliminary cost benefit study was used to evaluate the status of vegetation density of mangrove forest of Southern Andaman Island which is in use to monitor the forest.


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