%0 Journal Article
%T Flood Vulnerability Mapping: A Case Study of Okoko Basin, Osogbo
%A Toyosi Beatrice Adedoja
%A Oladimeji Samuel Popoola
%A Taofeek Abayaomi Alaga
%A Adesola Elizabeth Akindejoye-Adesioye
%J Journal of Geographic Information System
%P 580-596
%@ 2151-1969
%D 2023
%I Scientific Research Publishing
%R 10.4236/jgis.2023.155029
%X This study employed Geographic Information System (GIS) and remote sensing approach to analyze the flood vulnerability areas in the Okoko basin area of Osogbo in Osun state, Southwestern Nigeria. High-resolution imageries, a Topographic map of the study area and a TCX software program (Version 2.0) were integrated using ArcGis (10.7). Some of the causative factors for flooding in the watershed were taken into account which are: Land use, Distance of buildings to drainage, Digital Elevation Model, and Slope. This study aimed at mapping the flood-vulnerable areas along the Okoko basin of Osogbo. In developing a flood risk/flood hazard map of the study area, and determining the level of expected disaster, a multi-criteria analysis was utilized. The factors considered were ranked in five classes with the highly vulnerable areas having the highest score of ¡°5¡±. These factors were weighed according to the estimated significance of causing flooding. The study revealed that the study area has an estimated area of 17.85 km<sup>2</sup> of which 14.2 km<sup>2</sup> falls within the vulnerable areas while 3.6 km<sup>2</sup> is on the least vulnerable areas. Moreover, out of 16,829 buildings in the study area, 8204 buildings were found susceptible to flood disasters. This research attempts to equip decision-makers to make accurate decisions and also serves as a mitigation measure for flood disaster management.
%K Hazard
%K MCA (Multicriteria Analysis)
%K Floodrisk
%K TCX Software
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=128756