Open Source Data and Method for the Identification of Urban Flash Flood Prone Areas and the Ranking of Flood Vulnerability in Developing Countries: Case of Khartoum, Sudan

Authors: Mamadou Coulibaly*, University of Wisconsin Oshkosh, Mohamed Babiker Ibrahim, Department of Geography, Hunter College, City University of New York
Topics: Hazards and Vulnerability, Water Resources and Hydrology, Spatial Analysis & Modeling
Keywords: Developing country, Khartoum, Sudan, Spatial Analysis, Urban Flooding, Flood, Flash Flood, Hazard, Risk, Watershed Analysis, GIS
Session Type: Poster
Day: 4/11/2018
Start / End Time: 10:00 AM / 11:40 AM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded

Due to climate change, an increasing number of urban communities are subject to unprecedented flooding episodes resulting in loss of lives and property damage. Most urban areas in developed countries have access to numerous tools to assist victims during and after flooding events. In contrast, most developing countries face much greater challenges associated with similar events. In such countries, coping with flood hazards requires approaches that are adapted to the specificities of the local cultural, social, and financial situation. These developing countries often lack accurate forecast and evacuation systems. Thus, it appears that solving the recurring issue of urban flooding must start with the identification of risk areas, followed by an evaluation, and then an adoption of approaches to reduce the severity and extent of flood incidents as well as related damages.
This study presents the application of a replicable and low-cost approach to systematically identify potential flood risk zones of urban areas with a precarious storm drainage system. The approach combines spatial analyses tools, uses data gathered from open source web sites and some remote sensing techniques, and digitizing. In essence, the study utilizes a watershed and an overlay analysis-based model to integrate hydrological and structural features in order to reveal impediments to storm water paths. This approach was originally developed for the city of Abidjan, Cote d’Ivoire; it is now been applied to the city of Khartoum, Sudan, which present a much different landscape than Abidjan.

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