Cartography of flood hazard by overflowing rivers using hydraulic modeling and geographic information system: Oued El Harrach case (North of Algeria)

The aim of the present study is the management of flood risk through the use of cartography of flood hazards by overflowing rivers. This cartography is developed using modern simulation tools namely the hydraulic model (HECRAS) as well as the Geographic Information System (ArcGis). The study concerns Oued El Harrach (North of Algeria) surrounding area which has been subject to several floods causing significant human and material damage. This loss is a consequence of the use flood zones as habitats for people. This can be avoided in the future by use the mapping of the spatial extent of the flood hazard on the land of the Oued El Harrach. Hence the importance of the cartography developed in this study as an essential tool for decision makers in prevention, protection and management of flood risks.