Flood Mapping of Federal Polytechnic Ekowe, Bayelsa State, Using Remote Sensing and GIS Tools

The Federal Polytechnic Ekowe is one of the fast-growing polytechnics within the region, the main campus has been exposed to frequent flood hazards which were responsible for many damages in several areas of the main campus.This study was focused on the development of flood hazard map showing high vulnerability areas, medium/moderate vulnerability areas and low vulnerability areas of the main campus.The primary software used for the analysis and mapping was Esri's ArcGIS 10.8.1, Elevation dataset (Height), Landsat 9 satellite imagery, rainfall data, and digital soil map of the world.The present work introduced a flood hazard assessment methodology, using multi-criteria analysis and classification in the GIS environment.The results for the study showed that built-up area (94.42%) and vegetation (4.33%).The Elevation model showed minimum and maximum heights were 20.474m and 22.702m respectively.The Slope model also showed minimum and maximum slope percentage (s) were 0.00527 and 8.719 respectively.Other results obtained from multi-criteria were 28.61% for elevation and drainage distance, slope (12.71%) and precipitation (9.84%).In conclusion, more drainage infrastructure is required for the mitigation of flood water in the identified critical areas.