Flood Vulnerability Mapping using Geospatial Techniques: Case Study of Lagos State, Nigeria

Flood is one of the natural disaster known to be part earth biophysical processes, which its occurrence can devastating; due mostly anthropogenic activities and climatological factors. The aim research identify map extent at impact flood intense rainfall rise in water study area using geospatial techniques specific objectives are carry out terrain analysis generate indicator maps area. analyzed rain fall data;, drainage system Shuttle Radar Topographic Mission (SRTM 30m) ArcGIS 10.8 was modelled contributing factors generated through on-screen digitization topographic scale 1:50,000 Ondo South-West. mean annual Lagos State environment from data spatial tool. SRTM used results showed lowest 1,700mm highest 2,440mm. Digital elevation model (DEM), slope, flow direction were SRTM. Drainage density system. slope entire classified into five classes very high (14%-48.5%) (7.6%-13.9%) moderately (4.2%-7.6%) low (1.5%-4.2%) (0. % - 1.2%).