Reference : Karstic Hazard in BOUKADIR (Chlef-Algeria) and its potential socio-economic impact
Scientific congresses and symposiums : Unpublished conference/Abstract
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/226268
Karstic Hazard in BOUKADIR (Chlef-Algeria) and its potential socio-economic impact
English
[fr] Le risque karstique à BOUKADIR (Chlef-Algérie) et son potentiel impact socio-économique
Moulana, Meriem Lina mailto [Université de Liège - ULiège > > > Form. doct. sc. (géog. - paysage)]
Guendouz, Mostefa mailto [Université des sciences et de la technologie HOUARI BOUMEDIENNE > Géographie et Aménagement du territoire > > >]
Hubert, Aurelia mailto [Université de Liège - ULiège > Département de géographie > Géomorphologie et Géologie du Quaternaire >]
16-Mar-2018
Yes
National
BELQUA annual workshop
16 Mars 2018
[en] Algeria ; Boukadir ; Ouarsenis ; Karstic region ; Geology ; socio-economic context
[en] Boukadir, the municipality of the Wilaya of Chlef located west of Algiers has never been defined as a karstic region of Algeria despite the formation of a large collapse sinkhole in June 1988. The sinkhole formed a crater with 60m wide and 35 m deep across the national road RN4 linking the Wilaya of Algiers to Oran.
The municipality of Boukadir is located near southern edge of a 20 km wide plain flooded by the Chlef River bounded to the south by the Ouarsenis mountain range. The northern piedmont of the Ouarsenis Range is composed of Lithothamnion limestones of the tertiary that form a 25° dipping structural surface. Traces of karstification were founded in these Lithothamnion limestones outcropping at the surface. At the level of the plain and of the collapse sinkhole, the carbonate rocks are covered with younger sediments (quaternary alluviums). In order to objectively evaluate the hazard in the covered karst, we combine a range of boreholes to unravel the geometry of the carbonates and its cover. The characteristics of the limestones are evaluated combining XRD, XRF and thin sections in order to evaluate its dissolution potential. The socio-economic context is reviewed (population, industry, agriculture...) to discuss the karstic risk.
http://hdl.handle.net/2268/226268

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