Assessment of Urban Vulnerability to Floods using GIS Based Modeling Approach

Flooding is an environmental phenomenon that can pose a risk to social, physical, economic and environmental effects. In response to these flood risks coupled with high density population, the social and environmental implications of these floods affect a variety of vulnerability scores. Presenting a case study of the Makassar region, this paper develops the overall vulnerability assessment to floods using the framework analysis of the BNPB (The Indonesian National Board for Disaster Management) and Geographic Information System (GIS) modeling approach.Based on the grid mesh of 50 meter scales as the spatial treatment unit analysis, the study
aggregated the local indicators to a single composite index that enable spatial vulnerability representation at sub-district levels. These indicators were composed from various social, physical, economic, and environmental factors. Overall flood vulnerability index (FVI) is assessed which areas are most vulnerable to flooding with regard to the system’s components.