Mapping and analysis of urban drainage system in Asaba metropolis delta state using remote sensing and geographic information system

This study focuses on mapping and analyzing the urban drainage system in Asaba Metropolis, Delta State using Remote Sensing and Geographic Information System (GIS) techniques to improve storm water channeling. The objective is to map the existing system, determine the best routes considering natural storm water runoff, delineate drainage routes and sub catchments, and design the drainage network. The method used involves using existing topographical maps to create Digital Elevation Models (DEM), drainage route and drainage sub catchment maps. The results include digitized contour, digitized Spot Height, Triangular Irregular Network (TIN), Contour DEM, Drainage Map, Flow Accumulation, Stream Delineation Grid, Catchment Polygon, Drainage Line Map, and drainage data from the Storm Water Management Module. The study identified vital information for future development and growth of the as-built environment in the study area. The conclusion is that proper drainage design is needed, waste management boards should conduct frequent sensitization on waste dumping, and more drainage construction is needed to evacuate waste water.