Flash Flood Susceptibility Mapping of Sungai Pinang Catchment using Frequency Ratio

Flash flood are natural disasters that frequently occur in Malaysia especially urban areas. Due to this, the development of flash susceptibility mapping one tools used aid local authority reducing and managing impact. Frequency Ratio (FR) is a popular method predictive modeling because its capabilities determine critical conditioning factor flood. The aim this research was compare standalone FR with Ensemble FR-AHP. This ensemble uses pair-wise comparison between Analytical Hierarchy Process (AHP). For research, ten factors were selected which slope, aspect, curvature, Topographic Wetness Index (TWI), Stream Power (SPI), Normalized Difference Vegetation (NDVI), distance from river, rainfall, elevation, land use/land cover (LULC). inventory obtained authorities where occurred Penang, on November 2017. 70% 110 flooded locations as training dataset assess spatial distribution flooding whereas remaining 30% validation dataset. Based results, prediction rate FR-AHP slightly better accuracy compared 88.33% (FR-AHP) 85.62% (FR). output crucial assist use planning drainage system study area.