Author(s) :

Bappi Abubakar, Hussaini Mohammed., Jimoh A. Ibrahim., Sadeeq Abdulrasheed.

Volume/Issue :

Abstract :

There is a significant increase in the occurrence of floods globally, with an impact on habitation and different sectors of the economy. This, in turn, necessitates the use of different flood mitigation strategies, wherein flood vulnerability assessment plays a significant role. The research assessed the overall flood vulnerable areas in Billiri local government area of Gombe State, Nigeria. The factors considered include; slope, elevation, rainfall, soil, drainage, land use and land cover factor. The coordinate of the study areas was obtained using global positioning system (GPS), flood risk factor was analyzed, classified and integrated/overlay to produce final flood prone map of the study area using weighted overlay methods in ArcGIS. According to flood risk factors analysis, the results indicates that southwestern part of the study area is more vulnerable to flood, which include villages such as Ayaba, Shela, Tudu, Kwaya, Lakarai, Sansani, Latoddo, Polido and Fagla respectively. Based on the flood risk factors, slope contributed highest percentage 15.40%, elevation 8.80%, rainfall 3.10%, land use and land cover 10.80%, drainage density 5.90% and soil factor having 1.90%. Based on their hazard level classification, slope factor happens to be the number one factor of flood disaster in the area. Generally, the result of the integrated flood vulnerability map showed 34.41% of the study area is highly vulnerable to flood. The flood mitigation measures required based on the research was creation of dams to control flood, proper channelization, use of flood warning system. Floodplain restoration, public awareness, and suitable drainage system.

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