Determine of Tsunami Evacuation Route in District Padang Barat, Padang City Using Geographic Information System

Abstract

Padang City is the region where the area covered by tsunami red zone. Purpose of this research is to know the service area of the shelter and tsunami evacuation route use GIS and to compare evacuation route between government map and result from GIS. Method in the research is multi ring buffer and network analysis. The secondary data used for GIS where has took from government, and primary data has took from survey evacuate building, road wide and road condition. Result of the research has taken 35 buildings where the object can use as temporary evacuation or shelter. The smallest building is RS Hernia with the area is 114 m2 and capacity 114 persons. The biggest building is Plaza Andalas with the area is 5983 m2 and capacity 5983 persons. The high service area of the shelter to building around the location in circle 200 m from center point of the shelter where covering 2854 buildings. The smallest service area of the shelter in circle 50 m where covering 499 buildings. The long evacuate from number location 22 to STMIK Indonesia Padang is 1926 m. The short route from number location 10 to Weekend Market is long 26 m. The average evacuation route is 440 m.