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Planning for a Deluge
Lagos, Nigeria, is expected to double its population by 2050, to more than 36 million people. What happens to cities experiencing population growth like this when crucial flood drainage systems cannot keep up with expansion? And how can the techniques of GIS—Geographic Information Systems—help governments predict the problems and create plans to mitigate them?
That’s the topic of a talk on April 19 by Olusegun Adeaga, a geographer and hydrologist from Lagos. Hosted by the Washington College GIS Program, Adeaga will speak on the “Flood Disaster Management Plan for Lagos Megacity.” The talk at 6 p.m. will be held in Litrenta Hall of the John S. Toll Science Center and is free and open to the public.
When cities expand too rapidly, excessive modification of drainage basin characteristics in an urban catchment area is anticipated. If this is done without considering the entire hydrological environment of the city, urban and flash flooding increases. Adeaga will discuss pre-disaster flood probability maps and the early flood warning signal system that serve as a decision planning and warning tool for what is being called Lagos Megacity.
Adeaga holds a PhD in geography with specialization in hydrology from the University of Lagos, where he is now a professor in the Department of Geography. He participates in the NIGER Basin Focal Projects (BFPs), Vulnerability Assessment of Freshwater Resources to Environmental Changes-Africa, Optimization of Tiga and Challawa Gorge Dams and TREES‐ 3 Project Validation Workshop (West Africa) projects, among others.