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Shoreline Dynamics and Vulnerability Assessment Along the Karnataka Coast, India: A Geo-Statistical Approach

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Abstract

Coastal areas are dynamic transition zones between land and sea. Their vulnerability is increasing due to human interventions with the natural processes. In the present study, we focused on coastal vulnerability assessment along Karnataka, south-west coast of India to identify the erosion-prone areas by integrating thematic datasets such as shoreline dynamics, land-use/land-cover, geomorphology, geology, elevation and bathymetry using remote sensing and GIS techniques. The 304 km coastline of Karnataka is divided into fourteen littoral cells, and each into a number of transects at uniform intervals. In this coastal stretch, ~ 265 km (87%) is vulnerable to erosion of which ~ 179.5 km (59%) is undergoing erosion at various magnitudes. Littoral cells in the south are subjected to high erosion and vulnerability, and the areas having human interventions are the most erosion-prone. This approach provides valuable information on the degree of potential vulnerability risk which serves as a guide to develop adaptation measures by the coastal zone management authority.

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Acknowledgements

The authors are thankful to the Space Applications Centre, ISRO, Ahmedabad for the award of Research Project under the Meteorology and Oceanography Programme-III (SAC/EPSA/MPSG/GSD/MOP3/CST/WP/01/2013). They acknowledge National Remote Sensing Centre; Geological Survey of India; and National Hydrographic Office, India, for providing the necessary data to carry out this research work. Sincere thanks are due to Prof. Subba Rao V. Durvasula, Adjunct Professor, University of New Mexico, USA, for his suggestions and editing the manuscript.

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Authors and Affiliations

  1. Department of Marine Geology, Mangalore University, Mangalagangothri, Karnataka, 574 199, India

    Ateeth Shetty & K. S. Jayappa

  2. Geo-Sciences Division, Space Applications Centre (ISRO), Ahmedabad, Gujarat, 380 015, India

    Ratheesh Ramakrishnan & A. S. Rajawat

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  1. Ateeth Shetty
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  2. K. S. Jayappa
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  3. Ratheesh Ramakrishnan
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  4. A. S. Rajawat
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Correspondence to K. S. Jayappa.

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Shetty, A., Jayappa, K.S., Ramakrishnan, R. et al. Shoreline Dynamics and Vulnerability Assessment Along the Karnataka Coast, India: A Geo-Statistical Approach. J Indian Soc Remote Sens 47, 1223–1234 (2019). https://doi.org/10.1007/s12524-019-00980-0

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