Handling of Beach Change on the Beach of Indramayu (Section: Muara Kali Eretan - Muara Sumber Mas)

Abstract

The coastline of Indramayu, particularly the segment between Muara Kali Eretan and Muara Sumber Mas, is a dynamic coastal environment experiencing significant beach changes, primarily dominated by chronic erosion. This severe shoreline retreat poses a direct threat to residential areas, vital infrastructure, and local economic activities such as aquaculture. This research aims to analyze the spatio-temporal dynamics of shoreline changes in this specific section and to formulate effective handling strategies. The methodology employs a quantitative analysis of shoreline migration rates using multi-temporal satellite imagery from recent decades, processed using the Digital Shoreline Analysis System (DSAS) to calculate the End Point Rate (EPR) and Net Shoreline Movement (NSM). This analysis is supplemented by field observations and an assessment of dominant coastal processes, including wave dynamics and sediment transport patterns. The results quantify an alarming rate of erosion along the study area, with certain hotspots experiencing critical shoreline retreat. This study evaluates the effectiveness of existing coastal protection measures (if any) and proposes an integrated management plan. Recommended handling strategies include a combination of hard-structural solutions, such as breakwaters or groins, and soft-structural approaches, like beach nourishment and mangrove rehabilitation, tailored to the specific local conditions. This research provides a technical basis for sustainable coastal management and disaster risk reduction in the Indramayu region.