Abstract
In this study, the Optimal River Network (ORN) has been determined in a waterlogged area. A dense 3D coordinates obtained from Differential GPS were used to create a Digital Elevation and Digital Terrain Models and their contingents comprising Watershed, Slope, Contours and Aspect. Areas at risk of being flooded are northward, surrounded by lowlying terrain while the south constitute undulating hills with natural river discharge at the centre. The ORN determines an ideal direction of flow of water out of the region, putting into consideration future planning and development. Existing small streams are directed to a permanent flow network to minimise land loss due to erosion and reduce cost of developing building projects in the waterlogged area. It is evident here that Differential GPS and Geographic Information Systems software can be combined to find ideal solutions to natural hazards akin to flood and erosion and even beyond.
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