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Le bassin versant du Hodna (Algérie) : ressources en eau et possibilités d'aménagemen

Abstract : Strongly marked by a mediterrenean climate with a tendency to aridity the Hodna has inherited from a pastoral society imbued with nomadic traditions. This has engenalered an organization of its area founded on the complementarity of different environments. This complementarity is linked with a constant movement of populations and herds, so, and movements of variable importance. The climati's aridity points on the weakness of precipitations on the nain part of the versant bassin. The chain of the Hodna stands as a barrier to the atmospheric disturbances coming from north. It constitues the southern limit to mediterranean influences. This situation is often aggraved by a high evapotranspiration a low vegetal cover favoring erosion. Climati's aridity does not necessarily mean absence of water, for the Hodna's inhabitants have practiced for a long time an irrigation which was based on flanned inundation, it attest for the absence of flow. Although the precipitations are weak, they fall down in the form of showers rendering the flows into swelling. Oueds, that are supplied by numerous springs, rising at the bottom of mountains, have brought not inconsiderable contributions. The following paradox : arid climate-abundance of water, is confirmed by the large potentialities of subterranean waters presented by the set up aquiferous. The improvement of hydraulic situation is most possible. It lies in the recovery of rain waters thanks to process of retain and to rational exploitation of subterranean waters so as to hope finally for an integrated development of the Hodna.
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Submitted on : Wednesday, October 16, 2019 - 4:34:54 PM
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Mustapha Kebiche. Le bassin versant du Hodna (Algérie) : ressources en eau et possibilités d'aménagemen. Géographie. Université Nancy 2, 1986. Français. ⟨NNT : 1986NAN21004⟩. ⟨tel-02318163⟩



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