Spatial-Based Earthquake Disaster Risk Analysis In Parepare City, South Sulawesi

Abstract

The research objectives are to create hazard maps, vulnerability maps, spatial-based risk analysis in the form of earthquake disaster risk mapsin Parepare. The earthquake disaster riskanalysis applied Geographic Information System spatial-based overlay analysismethod. Research to identify earthquake hazard risk was based on earthquake hazard factors, the vulnerability factor of population density and capacity factor. Earthquake hazard map wasgenerated from calculatingThe Peak Ground Acceleration  value, procured from the source map and hazards of earthquake in Indonesia 2017 (Team 9)the peak acceleration map in the base rock for the probability exceeded 2% in the last 50 years. Automatic terrain classification map using SRTM (250 m or mesh 1 km) was obtained from Koiwahashi and Pike (2007)and the average distribution of S-waves, shallower than 30m (AVS30),were acquired from J-SHIS for each topographical characteristic (16 classes or 24 classes). The vulnerability data were used for calculating population exposure index and loss index, and the vulnerability was obtained from Focus Group discussion. The earthquake disaster risk index calculated by useing AHP method (Analytical Hierarchy Process).The calculation results showed that the villages with a high risk of earthquake disaster were Bukit Harapan Village, Bukit Indah Village, Ujung Lare Village, WatangSoreang village, and Lapadde village, while the village having the lowest risk of earthquake was Mallusetasi villa