MAPPING OF TSUNAMI VULNERABILITY POTENTIAL IN SABANG CITY, ACEH PROVINCE

ABSTRACT : This research addresses the tsunami risk vulnerability of Sabang City, Aceh, which is located near the Sumatran megathrust zone, one of the areas of highest seismic activity in the world. Sabang City is at high risk of tsunamis, with most of its area falling within the high to very highrisk zone. Through a Geographic Information System (GIS) approach, this study analyzed five main parameters: slope, elevation, land use, distance from coastline and distance from river to map tsunami vulnerability and evacuation routes. The analysis showed that more than half of Sabang City falls into the high and very high tsunami vulnerability categories, emphasizing the importance of effective mitigation and preparedness strategies. The evacuation route mapping produced in this study depicts five routes in Sabang City, Route 1 is the longest route, 35.21 km long and passes through eight villages in the eastern part of the city. Route 2 is the shortest route with a length of 0.85 km, located only in Iboih village in the northwest. Route 3 is 2.13km long and runs along the border between BateeShok and Paya Seunara villages in the central and northern parts. Route 4 is 1.29km long and is only found in Jaboi village in the southeast. Route 5 is 7.68 km long, passing through three villages (Keunekai, Paya, and BateeShok) in the southern part of the city.

KEYWORDS –Vulnerability, Tsunami Risk, Sabang