Identification of danger zones for flood event in Perlis, Malaysia / Nor Fatin Asyikin Muhammad Fauzi

Flooding is caused by a variety of circumstances, including a lot of rain, quickly melting snow or ice, storm surges from hurricanes or typhoons, and overflowing rivers or dams. In Perlis, long and heavy rainfall are frequently the cause of flooding. There are several method can be used to identify danger zones including Analytical Hierarchy Process (AHP). This study has employed geospatial techniques of AHP approach using the pairwise comparison technique to analyze several factors that are vulnerable to flood while the weighted overlay of a Geographic Information System (GIS) based technique takes into consideration the relative importance of parameters and the class associated with each parameter to produce a flood hazard map of the study area. However, several factors were selected which were slope, elevation, Topographic Wetness Index (TWI), rainfall, and Land Use Land Cover (LULC). The final results also produced a comprehensive flood hazard map of Perlis in 2023 using QGIS Desktop 3.36.2 and the resulting map was divided into five classes from very low, low, moderate, high, and very high risk zones. It is concluded that the use of GIS to analyze the regions that are vulnerable to flood has yielded important information about those areas in Perlis.