Ocean and Coastal Management 253 (2024) 107132 0964-5691/© 2024 Elsevier Ltd. All rights reserved. Evaluation of Shoreline Alteration Along theJagatsinghpur District Coast, India (1990–2020) using DSAS Sana Rafi a , Nitesh Kumar Mourya b, * , Raghupathi Balasani c a Department of Geography, School of Earth Sciences, SRT Campus, Tehri, Hemvati Nandan Bahuguna Garhwal University, Uttarakhand, India b GIS Faculty, Geocatalog: Institute of Research and Geoinformatics, New Delhi, India c JNTU, Hyderabad, India A R T I C L E INFO Keywords: Shoreline Alteration Erosion Digital Shoreline Analysis System (DSAS) Decision matrix Coastal Protection Measures Accretion ABSTRACT This scientific investigation provides valuable insights into the dynamics of shoreline alteration in the Jagat- singhpur 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 Jagat- singhpur 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. 1. Introduction The shoreline, representing the interface between land and seawater, is a highly dynamic system influenced by waves and currents, which exert energy for erosion, sediment transportation, and deposition. The state of the shoreline refers to its positional trend, which is classified into three categories: (1) Eroding, characterized by landward retreat; (2) Equilibrium, representing a balance between erosion and accretion; and (3) Accretion, denoting seaward movement (Husain, 2018). Under- standing the factors influencing shoreline position is crucial for coastal hazard management (Cowart et al., 2011). To comprehend coastal morphodynamics, erosion and accretion patterns, and shoreline computation, the analysis of beach profiles is essential (Armenio et al., 2019; Ramesh and Ramachandran, 2001). The analysis of shoreline changes plays a vital role in identifying causal processes, assessing the impacts of natural and human factors, and contributing significantly to coastal conservation and planning efforts (A’Rachman and Hijrawadi, 2020). Isha and Adib (2020) highlighted the significance of shoreline mapping and analysis from a coastal hazard management perspective. Researchers worldwide did studies to analyze and detect shoreline changes, as discussed in the literature review section. Such studies are crucial for advancing regression planning, recognizing geo-hazards, enhancing the understanding of decomposition processes, conducting theoretical and predictive modelling, and characterizing coastal areas affected by natural, anthropogenic, or combined factors. It is important to note that detecting shoreline changes requires continuous datasets spanning extended periods, as shoreline movement is a geological pro- cess that occurs gradually over time. Shorter-duration studies may not capture the comprehensive dynamics of shoreline changes, making long-term data collection essential for effective coastal hazard man- agement (Husain, 2018). In this research, we investigated a 55.045 km long coastal tract in the Jagatsinghpur district of Odisha, India. Due to its sub-tropical nearshore location, the selected region is particularly affected and vulnerable to multiple disasters, such as tropical cyclones, storm surges, and tsunamis. The district experiences recurring natural disasters, with approximately 80% of its area prone to one or more types of natural hazards. Its coastal part is mainly exposed to floods and cyclones. With 80% of the annual * Corresponding author. E-mail addresses: snrafi18@gmail.com (S. Rafi), princeofmouryaempire@gmail.com (N.K. Mourya), raghupathibalasani@gmail.com (R. Balasani). Contents lists available at ScienceDirect Ocean and Coastal Management journal homepage: www.elsevier.com/locate/ocecoaman https://doi.org/10.1016/j.ocecoaman.2024.107132 Received 28 July 2023; Received in revised form 20 March 2024; Accepted 30 March 2024