Analisis Perubahan Garis Pantai Akibat Perubahan Tutupan Lahan Menggunakan Digital Shoreline Analysis System (DSAS) dan Persepsi Masyarakat di Kecamatan Pantai Labu Kabupaten Deli Serdang

Abstract

This research was conducted to determine the impact of land cover change on shoreline change using the DSAS method. The results of DSAS analysis showed that out of 705 transects, 367 transects experienced accretion and 338 transects experienced abrasion. The west coast was dominated by accretion (286 out of 352 transects), with the highest accretion value of 518.57 m at transect 162. This is due to good mangrove vegetation, which is able to retain sediment. The accretion area on the west coast reached 85.63 hectares. In contrast, the east coast is dominated by abrasion (273 out of 353 transects), with the highest abrasion value of -128.40 m at transect 34. The significant decline in mangrove vegetation on the east coast, due to land excavation for the construction of Kuala Namu Airport and land use change, is the main cause of abrasion. The area of abrasion on the east coast reached 51.69 hectares. Community perceptions confirmed the importance of mangroves in reducing abrasion and supporting accretion, and suggested replanting and education as protective measures.