Flash Flood Susceptibility Mapping in Sungai Pinang catchment using Weight of Evidence

Abstract

Flash floods are one type of natural disaster that frequently occurs in Malaysia, especially in urban areas. This paper's objective is to develop the flash flood susceptibility mapping (FFSM) using weight of evidence (WOE) in the Sungai Pinang catchment. The Sungai Pinang catchment is located in the highly urbanised areas of Georgetown. The FFSM was developed using six flash flood conditioning factors: elevation, slope, rainfall, land cover, distance from the river, and lithology. The study showed that the WOE method is capable of producing high accuracy, with a success rate of 0.839 and a validation rate of 0.923 for the receiver operating characteristic's area under the curve (AUROC).