The basis for deriving the flood hazard index maps are the following two datasets: 1.) Standardized peak runoff rates in cubic meters per second (m³/s). 2.) Standardized digital elevation model (DEM). These map were classified using the Natural Break (Jenks) method into five classes to produce the Flood Hazard Index (FHI). The index ranges from 1 (very low flood hazard intensity) to 5 (very high flood hazard intensity). For a detailled method description see article: Daniel Asare-Kyei, Gerald Forkuor and Valentijn Venus (2015): Modeling Flood Hazard Zones at the Sub-District Level with the Rational Model Integrated with GIS and Remote Sensing Approaches, Water 7, 3531-3564, https://doi.org/10.3390/w7073531