Abstract

Several communities reside downstream of Kubanni Dam, thereby making them vulnerable to flood. However, the levels of vulnerability, areas, households, and buildings at risk of flooding downstream of Kubanni Dam remain unknown.  This study employed Geographic Information System (GIS) techniques to identify areas and buildings at risk in the event of a breach of the Kubanni Dam. Areas liable to flood were delineated using ArcGIS software. Findings from the study revealed that in the event of any flooding due to the breach of the Kubanni Dam, the most affected areas would be Tudun Jukun, with about 2,699 buildings (25%), Gyallesu with about 2,180 (20.2%), Tudun Wada with about 1,851 buildings (17.2%), Hanwa with 984 buildings (9.1%), parts of Sabon Gari with about 918 buildings (8.5%), Zango with about 845 buildings (7.8%) and the Government Reserved Area (GRA) with about 772 buildings representing 7.2% of the total numbers likely to the affected. The results further showed that the Tudun Jukun area, with a population of 38,622, is located in a flood-risk area, followed by Tudun Wada, with a population of 26,487, which is also at risk. It was also found that the PZ area, with 4,997 households and 1,851 houses at risk of flooding, has the highest average number of persons per Hectare (68902.02) at risk of loss in the event of flooding. This study has demonstrated the effectiveness of GIS techniques in flood risk and vulnerability analysis as well as its potential in guiding physical planning and flood disaster risk reduction.