GIS-based Spatial Modeling of Flood Prone Areas in Ambon City Center, Indonesia

Abstract

This research aims to model flood-prone areas in Ambon's downtown area, given the increasing disaster potential due to climate change and urbanization. The method used includes geographic information system (GIS) technology and remote sensing, namely the multicriteria evaluation method, where the data analyzed includes elevation, slope, soil type, land use, distance from the river, and rainfall. The results showed that low vulnerability has an area of 1,589.91 ha or 73.30%, medium vulnerability has an area of 238.59 ha or 11%, and high vulnerability has an area of 340.49 ha or 15.70%. Flood-affected settlements in the low class are 827.15 ha or 60.68%, in the medium class are 214.51 ha or 15.74%, and in the high class are 321.46 ha or 23.58%. The increase in flood risk in the study area is due to land use change and limited drainage capacity that requires serious attention. The results of this study provide a basis for more effective mitigation planning and policies in reducing flood impacts, as well as increasing community resilience in Ambon City against disaster threats