Terrain Analysis for flood Vulnerable Communities in Edozhigi District of Gbako Local Government, Niger state, Nigeria.

Abstract

Most Communities of Edozhigi district are located along the Kaduna River which is one of the large rivers in Nigeria. The location of Shiroro hydro Electric power dam in the state along this river has brought about annual flood disaster that destroys many lives and properties. The study aimed at geospatial analysis of flood vulnerable communities downstream of River Kaduna in Edozhigi district. The study focused on the use of remotely sensed data and Geographic Iinformation System (GIS) techniques for terrain analysis for flood disaster vulnerability assessment of Edozhigi district. The data used for the study include 2002 Base map, Geographic coordinates, 2014 Google earth image and 2014 SRTM of the study area.Digital Elevation Model (DEM) of the district was created for reclassification of elevation differences. From the Digital elevation model extracted from SRTM data and flow direction map created, shows twenty one (21) Communities trapped within the flood plain and this lies between 65 to 95 meter above sea level. The study concluded that geospatial tools were very necessary in assessing the terrain of the area and identify areas liable to flood. The study recommended the constant monitoring of the communities in the flood prone areas and public enlightenment on adherence to early flood warning and mitigation measures should be taken serious.