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Assessing the vulnerability of sites in the East African Rift Valley to natural hazards: case study of Bujumbura, Burundi
Nibigira, Léonidas; Havenith, Hans-Balder; Dewals, Benjamin et al.
2013Active Volcanism & Continental Rifting _ AVCOR 2013
 

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Keywords :
flood hazard; vulnerability; geo hazard
Abstract :
[en] Due to the geomorphologic, structural and climatic context, the East African Rift Valley is prone to many natural hazards. The locally high density of the population contributes to related risk. As a result, the impacts on the habitat and infrastructures are constantly increasing. This work is based on a case study near the city of Bujumbura, which, for decades, has been affected by severe floods. Based on a study focusing on one of its rivers, the river Ntahangwa, this work tries to answer some questions related to the potential causes and ways of prevention and management of flood risk. The analysis is based on hydrological considerations while having a look at the possible mutual influences between these hydrological risks and geodynamic hazards. The methodology uses rainfall, geographic, demographic, topographic, and elevation data. Hydraulic modeling reveals the extent of the flood hazard according to its likelihood of occurrence and its sensitivity to geodynamic disturbances. This led us to propose solutions and related prevention/remediation measures. Considering the vulnerability of the population, it is clear that a change of people’s behavior is needed to reduce the total risk they’re exposed to, both with respect to the choice of construction areas and to all kinds of activities related to rivers exploitation.
Research center :
Environment and Geohazards/ University of Liège
Disciplines :
Earth sciences & physical geography
Author, co-author :
Nibigira, Léonidas ;  Université de Liège - ULiège > Form. doct. sc. (géologie - Bologne)
Havenith, Hans-Balder  ;  Université de Liège - ULiège > Département de géologie > Géologie de l'environnement
Dewals, Benjamin  ;  Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering
Ozer, Pierre ;  Université de Liège - ULiège > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) > DER Sc. et gest. de l'environnement (Arlon Campus Environ.)
Language :
English
Title :
Assessing the vulnerability of sites in the East African Rift Valley to natural hazards: case study of Bujumbura, Burundi
Alternative titles :
[fr] Evaluation de la vulnérabilité de la vallée du Rift est-africain aux risques naturels: étude de cas sur Bujumbura, Burundi
Publication date :
13 November 2013
Event name :
Active Volcanism & Continental Rifting _ AVCOR 2013
Event organizer :
The Royal Museum for Central Africa (RMCA, Belgium), the European Center for Geodynamics and Seismology (ECGS, Luxembourg), the National Museum of Natural History (NMNH, Luxembourg), the Ministry of Infrastructure (Energy Water and Sanitation Authority (EWSA, Rwanda) and the Goma Volcanologic Observatory (OVG, Republic Democratic of Congo).
Event place :
Gisenyi, Rwanda
Event date :
Du 12 novembre 2013 au 14 novembre 2013
By request :
Yes
Audience :
International
Available on ORBi :
since 23 June 2014

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