Evaluation of Shoreline Alteration Along theJagatsinghpur District Coast, India (1990–2020) using DSAS

Abstract

This scientific investigation provides valuable insights into the dynamics of shoreline alteration in the Jagatsinghpur district coast, facilitating informed decision-making for implementing coastal protection strategies. This study presents a comprehensive assessment of shoreline alteration along the 55.045 km stretch of the Jagatsinghpur district coast in India from 1990 to 2020. Landsat 5 TM and 8 OLI satellite image data were used for the analysis. The quantification of erosion and deposition shoreline change rates are computed through a semi-automated approach employing four statistical methods SCE, NSM, EPR, and LLR in the Digital Shoreline Analysis System (DSAS). The coastline was divided into four zones at the tehsil level, resulting in the generation of 5149 transects, categorized as Paradip tehsil-I, Abhyachandpur tehsil-II, Ersama tehsil-III, and Balikud tehsil-IV. The analysis revealed significant erosion in specific areas, including Paradip town in Zone I, Nuagan in Zone II, Zone III, and Kusupur in Zone IV. The decision matrix showed an urgent need for erosion rectification in specific regions. The results indicate the necessity of implementing coastal protection measures in Zone III, B, and D subregions in Zone I and D and F subregions in Zone II. Meanwhile, in Zone IV, subregions A and B necessitate attention.