Geospatial Analysis of Tsunami Hazards and Mitigation Strategies

Abstract Indonesia has experienced its deadliest disasters named tsunamis, particularly since the devastating earthquakes in Aceh and Yogyakarta. The Sunda Strait region and its surrounding areas, located in the Megathrust zone of western Java, are especially vulnerable to tsunami events. Geospatial technology’s advancement offers disaster mitigation strategies with potential for loss reduction. This research aims to analyze tsunami hazards and its mitigation using geospatial approach. We focused on Pagelaran Sub-District in Pandeglang Regency, Banten, Indonesia. Secondary sources and field checks provide research data on hazards and tsunami evacuation routes. We used several data such as slope, coastlines, elevation, river and road networks, as well as land use. Analysis was carried out employing weighting, scoring, overlay, and network techniques. Tsunami hazard is categorized in three categories ie. low, medium, and high. In Tegalpapak, Margagiri, and Margasana villages, a total residential area of 34.93 hectares places these villages in a high vulnerability category. The fastest evacuation route covers 1 km in 2.41 minutes (Margagiri Village). Efforts to mitigate tsunami risk include identifying and mapping potential threats, community outreach, enhanced spatial planning, and placement of evacuation signs.