ESTIMATED IMPACT OF TSUNAMI HAZARDS DUE TO URBANIZATION IN THE AEROTROPOLIS AREA OF YOGYAKARTA INTERNATIONAL AIRPORT, INDONESIA

Abstract

This research aims to determine the urbanization in the aerotropolis area, determine the danger of tsunamis, and estimate the impact of tsunami disasters that are likely to occur. The method used in this research is spatial analysis using geographic information systems and remote sensing. Urbanization is known through analysis of changes in land use in the year before the airport, namely 2017, and after the airport in 2023. The tsunami hazard calculation uses mathematical calculations developed by Berryman (2006), which considers the loss of tsunami height per 1 m inundation distance (inundation height) based on distance to slope and surface roughness. Furthermore, the hazard results are overlapped with land use and building mapping. The findings show a significant increase in land use, especially in the residential sector, increasing by 3.5%, new residential areas increasing by 1,589%, and hotel hotels increasing by 31%, reflecting the progress made by government plans in urbanization. However, it should be noted that this area has a high risk of tsunami hazards, exacerbated by the flat topography and low surface roughness coefficient. Estimates of the economic and social impact of the hazard include severe damage to thousands of housing units, with significant financial losses. Sustainable regional development planning must be implemented by considering the risk of natural disasters and balancing urban growth and environmental sustainability. Involving local communities in planning processes, public education campaigns, and economic impact evaluations is crucial in creating a safe and sustainable environment in the region.