Indonesia Conference Directory

Coastal is an area that vulnerable for change, especially along the shoreline. The changes can occur in the form of abrasion or accretion. Many factors could be the causes of shoreline changes; one of it is the existence of mangrove ecosystem. Physically, the function of mangrove ecosystem is to protect the coastal area from the wave which can cause an abrasion. It also functions as sediment trap which lead to the accretion. The aim of this research is to know the relationship between the existence of mangrove and the shoreline changes along the Takalar Regency. This research was comparing two years of Landsat Imagery (1998 and 2018) to map the mangrove and the shoreline. The shoreline changes were analyzed using Digital Shoreline Analysis System (DSAS) application, meanwhile the mangrove density was analyzed using Normalized Difference Vegetation Index (NDVI) analysis. Results show that for 20 years, shoreline changes caused by abrasion was 147,03 m or 7,38 m/year, and changes caused by accretion was 135,34 m or 6,79 m/year. Mangrove area has increased 566,37 Ha along the Takalar Regency shoreline during these 20 years. The relationship analysis between shoreline changes with mangrove density were done using simple regression. The result shows that the coefficient regression number was 0,190, which mean a weak relationship. Nonetheless, F-test shows a positive relation, which means there were influences between shoreline changes and mangrove density; if the mangrove-s density is high, then the shoreline will tend to increase (accretion). On the other hand, if the mangrove-s density is low then the shoreline will tend to decrease (abrasion).