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Impact of sea level rise and shoreline changes in the tropical island ecosystem of Andaman and Nicobar region, India

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Abstract

We report here a four decades of shoreline changes and possible sea level rise (SLR) impact on land use/land cover (LULC) in Little Andaman Island by using remote sensing (RS) and Geographic Information System (GIS) techniques. A total of six remote sensing data sets covering years between 1976 and 2018 were used to understand the shoreline changes. Moreover, a Digital Shoreline Analysis System (DSAS) was used to estimate short- and long-term shoreline changes from ArcGIS environment. Besides, the island vulnerability due to SLR was studied through using digital elevation model (DEM). As a result of Sumatra earthquake (2004), the results were showed a significant variation in shoreline upliftment and subsidence. The land subsidence was noticed in the range of 1042–3077 ha with sea level rise between 1 and 5 m. Hence, we conclude that Little Andaman Island is vulnerable to SLR and overwhelm low-elevation coastal zone.

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Acknowledgements

The first author would like to thank the Director, NCSCM for providing support for the research work. This study was undertaken as part of the In-house research study “Vulnerability assessment of islands from the impact of SLR” (Contribution number: NCSCM/PUB/2021/0001). The authors acknowledge the financial and technical support of the Ministry of Environment, Forest and Climate Change, Government of India, and the World Bank under the India ICZM Project (P097985).

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  1. National Centre for Sustainable Coastal Management, Ministry of Ennvironment, Forest and Climate Change, Anna University Campus, Chennai, 600025, Tamil Nadu, India

    T. Mageswaran, V. Sachithanandam, R. Sridhar, Manik Mahapatra, R. Purvaja & R. Ramesh

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Mageswaran, T., Sachithanandam, V., Sridhar, R. et al. Impact of sea level rise and shoreline changes in the tropical island ecosystem of Andaman and Nicobar region, India. Nat Hazards 109, 1717–1741 (2021). https://doi.org/10.1007/s11069-021-04895-3

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