Inderscience Publishers

Flood risk mapping and vulnerability analysis using GIS: empirical evidences from New Town area, Ondo, Ondo State, Nigeria

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Spatial information technologies are changing the way in which decisions are taken in relation to the environment. Geographic information system (GIS) is one of such technologies that help to generate products useful in terrain analysis. In Nigeria, especially in the study area, floodplains and river corridors have been misused resulting in severe environmental hazards. Up-to-date information is required to assist decision makers in tackling the problems arising from the misuse of our floodplains. To this end, the capability of remote sensing (RS) and geographic information systems have been explored to generate products such as digital elevation models (DEM), slope maps and risk analysis maps which give useful information about the terrain. In our opinion, the information provided by these technologies can significantly improve strategic decision-making processes in floodplains and river corridors worldwide.

Keywords: flood risk mapping, vulnerability analysis, geographic information systems, GIS, Nigeria, floodplains, remote sensing, digital elevation models, slope maps, risk assessment, flooding, modelling, strategic decision making, river corridors, floods

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