Analysis of shoreline change along the coast of Rembang, Indonesia, using digital shoreline analysis system

The shoreline has dynamic conditions that affect coastal regions through erosion and accretion. This research aims to determine the shoreline change rate using Net Shoreline Movement (NSM) and End Point Rate (EPR) values in Rembang Regency in 2015 – 2021 and the impacts on the environment in the coastal area. The data were obtained from Sentinel 2A satellite imagery for 2015, 2018, and 2021. Also, field observations were conducted to measure the beach slope and collect sediment samples at several research points for analysis of sediment type and grains as supporting data. The research method used was descriptive quantitative. Satellite image analysis was done using ArcGIS 10.8 with the assistance of the Digital Shoreline Analysis System application to assess erosion and accretion rates using the Net Shoreline Movement and End Point Rate values. The results showed that the Rembang shoreline changed along 4.86 km from 2015 to 2021, with erosion of -9.92 m and accretion of 13.96 m (NSM) or -1.65 m/year and 2.33 m/year (EPR).