GIS-BASED ESTIMATION OF SHORELINE CHANGE AT THE OLIE PIER HARBOR HERITAGE SITE, MANGGAR, EAST BELITUNG, INDONESIA
Authors:   Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University (Bogor Agricultural University), Bogor, Indonesia, SABINA Anninda , YULIUS YULIUS ,   Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong, Indonesia, AGUS Syamsul B. ,   Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University (Bogor Agricultural University), Bogor, Indonesia, SALIM Hadiwijaya L. ,   Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong, Indonesia, DILLENIA Ira ,   Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong, Indonesia, ARIFIN Taslim ,   Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong, Indonesia, PRIHANTONO Joko ,   Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong, Indonesia, PURBANI Dini ,   Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong, Indonesia, HERIATI Aida ,   Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong, Indonesia, RAMDHAN Muhammad ,   Research Center for Geoinformatics, National Research and Innovation Agency, Bandung, Indonesia, SURYAWATI Siti Hajar ,   Research Center for Behavioral and Circular Economics, National Research and Innovation Agency, Jakarta, Indonesia, WAHYONO Ary ,   Research Center for Society and Culture, National Research and Innovation Agency, Jakarta, Indonesia, WISHA Ulung Jantama ,   Research Center for Oceanography, National Research and Innovation Agency, Jakarta, Indonesia; Department of Physics and Earth Sciences, University of the Ryukyus, Nakagami District, Okinawa, Japan, ZULFIANDI ZULFIANDI ,   Department of Culture and Tourism of East Belitung Regency, Indonesia
Published: May 2024

The coastal area is a dynamic region influenced by continuous interactions between land and the sea. Changes in coastal compositions are closely related to shoreline instability. This study analyzes coastline changes at the Olie Pier Heritage Site, Manggar, East Belitung, Indonesia, using statistical-based techniques EPR (End Point Rate) and NSM (Net Shoreline Movement) 2015 to 2023. The DSAS (Digital Shoreline Analysis System) was employed to calculate the shoreline alterations in every transect with a distance of about 100 m. The study area is generally predominated by a moderate abrasion. The EPR and NSM values indicate a potential for future shoreline changes, considering the present status and future estimations of oceanographic parameters (currents, wind, waves, tides). The highest erosion is identified in the Lalang Village with a shoreline retreat (NSM) of -65.38 m and a retreat rate (EPR) of 8.78 m/year. On the other hand, the highest accretion is observed in the Baru Village with a NSM of -56.68 m and EPR of 7.61 m/year. The implications of these shoreline changes on the heritage site and the coastal environment contribute to the management of coastal areas amidst global environmental challenges. This study provides valuable insights into conservation and sustainable development efforts in the coastal region of East Belitung.