Coastline Change using Time Series Satellite Images in the North Coast of Java: Study Case Indramayu Regency, West Java, Indonesia

Abstract

Coastal areas have continuous change due to the interaction between sea and land, which generally causes abrasion and accretion. Indramayu Regency has a coastline of around 147 km. Indramayu Coastal has the characteristics of a sandy beach with a dominant abrasion process triggered by digging beach sand and changes in the function of mangrove land into ponds. We applied remote sensing observation to obtain coastline data on a regular basis. Currently, satellite images support the availability of Landsat data in a relatively short time and cover a wide area. Landsat imagery has been used in the last ten years to detect coastline changes in study areas based on the BILKO and Digital Shoreline Analysis System (DSAS) methods. Abrasion in 2012 - 2022 covers an area of 805.71 ha and accretion covers an area of 941.63 ha. The widest abrasion is in Pasekan with an area of 266,451 ha. The abrasion process in Pasekan is very high due to the influence of high currents and waves from the sea, and the accretion process in Cantigi is very high due to the high supply from the Cimanuk River and the many mangroves that collect sediment that enters the sea.