Multi-Hazard Risk Assessment of Kulon Progo Regency

Abstract

Kulonprogo is one of the regency in Yogyakarta Special Region which hazardous and vulnerable. This research aims to map multi-hazard risk in Kulonprogo Regency. Perka BNPB 2/2012 is used as guideline for multihazard risk assessment. Hazard and vulnerability analysis are needed in risk mapping through a semi-quantitative approach, which uses weighting factors and index values. Hazards considered in Kulonprogo Regency are flood, landslide, and tsunami. Parameters to determine landslide and flood hazard potential are slope, rainfall, soil, and land use. While, tsunami hazard potential uses inundation height as its parameter. Multi-hazard map is obtained from overlying hazard maps using GIS tool. Vulnerability index is gained from social, economic, physical, and environmental components which are classified into three classes then deliver it through index 0 - 1. The result is risk index in range of 0.4 to 0.79, which indicates Wates, Kalibawang, and Kokap Sub-District as the highest on multi-hazard risk. Whereas, low risk stands to Lendah and Nanggulan Sub-District.