Shoreline Change Using Digital Shoreline Analysis System in the Coastal District of Banggae

Abstract

The study of shoreline change is an important step in understanding coastal dynamics in Banggae and East Banggae Sub-districts  is the first step to reducing the risk of coastal erosion and minimizing social, physical and economic losses. This study was conducted in the coastal areas of Banggae and East Banggae Subdistricts, Majene Regency, West Sulawesi Province by utilizing multi-temporal Landsat 8 OLI-TIRS satellite images in 2013, 2014, 2015, 2016, 2018, 2019, 2020, 2022, and 2023 Shoreline Analysis Shoreline changes were determined using the Digital Shoreline Analysis System (DSAS). End Point Rate (EPR), Net Shoreline Movement (NSM) were used to calculate the rate of shoreline change and the prediction of shoreline change for 9 years. The results showed that in the period 2013-2023 there was abrasion of 4.20 Ha and accretion of 1.45 Ha. In the period 2016-2019 there was abrasion of 4.02 Ha and accretion of 3.75 Ha. In the period 2020-2023 there was abrasion of 7.98 Ha and accretion of 24.48 Ha. Spatially, the coastal areas of Banggae and East Banggae sub-districts experience changes in coastline due to abrasion and accretion.