Current World Environment

Evaluation of Shoreline Changes using Digital Shoreline Analysis System (DSAS) and Geospatial Techniques along coastal districts of Odisha and West Bengal, India

Mintu Jana ^* and Dipak Bisai

¹ Department of Geography, Coastal Environmental Studies Research Center, Egra S.S.B. College, Vidyasagar University, Midnapore, West Bengal India

Corresponding author Email: janamintu6@gmail.com

DOI: http://dx.doi.org/10.12944/CWE.21.1.16

Abstract

Shoreline change research is required to safeguard coastal environments, mitigate risks, and promote sustainable development. Coastal boundaries are highly responsive to environmental fluctuations, where continuous shoreline shifts occur as a direct result of sediment dynamics, tidal actions, climate-driven sea-level variations, and underlying geomorphological processes.To quantify coastal modifications, the Digital Shoreline Analysis System (DSAS) is employed, integrating advanced geospatial analytical frameworks to track shoreline displacement over time.This study aims to assess long-term shoreline oscillations from 1980 to 2025, utilizing a Cohen’s Kappa accuracy assessment to validate the reliability of the derived shoreline data. Multi-temporal satellite data used from Landsat MSS, TM, and OLI/TIRS images to analyze shoreline shift. Its changes Investigated on seven coastal districts, where the shoreline Change Envelope (SCE), End Point Rate (EPR (m/year)), and Net Shoreline Movement (NSM (m)) methods are used on the statistical basis. Total 708 km coastline results demonstrated shift like Jagatsinghpur (moderate), Puri (substantial), Kendrapara (almost perfect), Bhadrak (moderate), Balasore (Fair), Purba Medinipur (slight) and South 24 Pargana (fair). According to EPR (m/year) and NSM(m) results, abrasion occurred along the South 24 Pargana coastal tract at rates of 3.90 m/ year and 175.57 m for this period. Purba Medinipur district has shown consistent and modest changes, with yearly rates of 0.32 m (NSM (m)) and 0.01 m (EPR(m/year)), respectively. Net shoreline movement (m) for Puri, Jagatsinghpur, Kendrapara, Bhadrak and Balasore are 8.41 m, -4.98 m, -84.10 m, -46.61m and 43.23 m respectively for this period. Only, Puri’s findings show factual of significant accumulation over the period.

Keywords

Accretion; Coastal Erosion; End Point Rate (EPR(m/year)); Geospatial Techniques; Net Shoreline Movement (NSM (m)); Shifting of Shoreline

Copy the following to cite this article:

Jana M, Bisai D. Evaluation of Shoreline Changes using Digital Shoreline Analysis System (DSAS) and Geospatial Techniques along coastal districts of Odisha and West Bengal, India. Curr World Environ 2026;21(1). DOI:http://dx.doi.org/10.12944/CWE.21.1.16

Copy the following to cite this URL:

[ HTML Full Text ]