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Assessement of flood hazards in eastern Mitidja Plain (Hamiz river and Reghaïa river) Algiers - Algeria

Ghani Cheikhlounis 1 Djelloul Belhai 1 Jean-Luc Chatelain 2 Mustapha Hellel 3 Djamel Machane 4 Boussaad Samet 1 Malek Habi 1
1 FSTGAT - Faculté des Sciences de la Terre, de la Géographie et de l'Aménagement du Territoire
2 Risques - Risques
LGIT - Laboratoire de Géophysique Interne et Tectonophysique
3 Institut des Sciences de la Mer et de l'Aménagement du Littoral (ISMAL)
4 CGS - Centre de recherche appliquée en Génie paraSismique
Abstract : The Eastern Mitidja Plain, highly urbanized in its Northern part, is crossed by two main rivers: the Réghaïa and Hamiz wadis. Along these wadis, anarchical buildings are developing. An exceptional flood may weaken these zones. Flood hazard détermination needs a statistic analysis of daily maximum rainfalls, which adjustments to the Gumbel law allows to determinate the maximum rainfall for different return periods. The calculation of maximum discharges linked to différent return periods allows evaluating the overflowing on cross section along the Hamiz and Réghaïa wadis. Hazard maps, obtained for each wadis, evidence zones that are potentially threatened by flooding. Such maps should be considered and used as the main tools reduce the risk.
Keywords : Hazard flood rainfall return period cartography Mitidja Algeria
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https://hal-insu.archives-ouvertes.fr/insu-00682037
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Submitted on : Friday, March 23, 2012 - 11:53:56 AM
Last modification on : Tuesday, October 19, 2021 - 7:01:32 PM

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  • HAL Id : insu-00682037, version 1

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Ghani Cheikhlounis, Djelloul Belhai, Jean-Luc Chatelain, Mustapha Hellel, Djamel Machane, et al.. Assessement of flood hazards in eastern Mitidja Plain (Hamiz river and Reghaïa river) Algiers - Algeria. Bulletin du Service Géologique National, 2011, 22 (2), pp.199-212. ⟨insu-00682037⟩

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