KAJIAN KONFIGURASI SHELTER UNTUK RENCANA EVAKUASI TSUNAMI DI KOTA CILACAP, JAWA TENGAH BERBASIS SISTEM INFORMASI GEOGRAFIS

Abstract

Tsunamis are ocean waves that can be caused by earthquakes, landslides or volcanic eruptions that occur at sea either vertically or horizontally. Waters south of Java island is characterized by active seismicity, earthquakes often cause tsunamis to watch, especially in densely populated coastal areas. This is a potential major disaster for the Cilacap city, it takes effort for a more integrated disaster response. Effective evacuation planning is an effort to minimize the possible impact of the tsunami will occur. Building evacuation shelter for tsunami are analyzed by using existing Network Analyst extention in ArcGIS software. Network analyst extention will generate a service area of population for evacuation safely. The results show that the potential shelter in the Cilacap city apparently not be able to cover all the areas that are in tsunami-prone zones. To overcome this, the addition of a potential shelter building have to be include on all inundated area. Tsunami evacuation maps of network analysis result has a character that is on tsunami early warning period, the longer the warning time, the shorter the evacuation time it self, the resulting service area will be smaller as well.