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Monitoring vegetation loss and shoreline change due to tropical cyclone Fani using Landsat imageries in Balukhand-Konark Wildlife Sanctuary, India

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Abstract

The study analyzes the coastline oscillations and land use and land cover (LULC) change due to the impact of the cyclone Fani in Balukhand-Konark Wildlife Sanctuary (BKWS), located in East India. In this study, two Landsat 8 images in the pre- and post-cyclone periods in 2019 were used. The transition zone discriminating land and water was calculated using normalized difference water index (NDWI) and desktop digitization. The digital shoreline analysis system (DSAS), an extension of ArcGIS, was used to model changes in the shorelines, and the net shoreline movement (NSM) was used to extract the change statistics. The vegetation damage was analyzed using the soil-adjusted vegetation index (SAVI) and the LULC changes were assessed using geospatial techniques. Then, LULC degradation maps were produced. The results highlight the dynamic character of the studied coastline with erosion in the flat sandy forests, and show that some areas had accretion in the northern portion. The results show that SAVI has decreased along with patches close to critical erosion points, regardless of climate trends. It was observed that the severe cyclonic storm Fani had created both ecological and physical disturbances in the sandy flat BKWS area. In the future, this study can provide important information on ecological and physical changes induced by cyclonic storms and be beneficial for restoring the biodiversity niche of this unique fragile coastal forest on the east coast of India.

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Correspondence to Celso Augusto Guimarães Santos.

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Mishra, M., Santos, C.A.G., da Silva, R.M. et al. Monitoring vegetation loss and shoreline change due to tropical cyclone Fani using Landsat imageries in Balukhand-Konark Wildlife Sanctuary, India. J Coast Conserv 25, 53 (2021). https://doi.org/10.1007/s11852-021-00840-5

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  • DOI: https://doi.org/10.1007/s11852-021-00840-5

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