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Housing & Urban DevelopmentOpen
Design a Neighbourhood Flood Risk Map for a Ibadan Community Before the Next Rainy Season
Produce a working flood risk map and a short action brief for a low-income neighbourhood in Ibadan, using open data, satellite imagery, and community input. Ibadan floods severely and repeatedly, and most affected communities have no accessible documentation of which streets and houses are at greatest risk.
The brief
Ibadan receives among the highest rainfall of any city in Nigeria, and its drainage infrastructure has not kept pace with decades of rapid, largely unplanned growth. Neighbourhoods like Apete, Agodi-Gate, and Oke-Offa experience flash flooding that damages property, destroys livelihoods, and occasionally kills people. After each flood, communities rebuild in place because they have nowhere else to go and no formal map telling them what the risk actually looks like.
A usable flood risk map does not require expensive software or a surveying team. Open tools like QGIS, Google Earth Engine, and NASA's open elevation datasets make basic inundation modelling accessible to anyone willing to learn them. Community members themselves are a critical data source: they know which drains block first, which streets become rivers within twenty minutes of rain, and which landlords built on reclaimed swamp.
Choose one neighbourhood in Ibadan. Using at least two open datasets and a documented methodology, produce a flood risk map that identifies high, medium, and lower risk zones at street level. Supplement this with a two-page action brief addressed to the local community development association: what the map shows, what they can reasonably do with it (including who to approach and what to ask for), and what its limitations are.
Submit the map as a high-resolution image or interactive link, the action brief as a PDF, and a one-page methodology note explaining your data sources and assumptions. Good work will be honest about uncertainty, visually clear to a non-specialist reader, and genuinely useful to the community rather than just technically impressive.