Submission is open for November 2024, Call for papers Volume 06, Issue 11, November 2024, Open Access; Peer Reviewed Journal; Fast Publication. The Journal is welcoming original Research Articles, Book Reviews, Commentaries, Reviewed Articles, Technical Notes Please you can reach us if you have any queries send email to: editor@journalijisr.com

CARTOGRAPHIE DE L’ÉROSION HYDRIQUE DANS LES DEUX BASSINS VERSANTS DES OUEDS SEIL ET SEKROUNA (TUNISIE CENTRO-ORIENTALE)

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Author: 
*Azaiez Naima, Hamza Ali and Ansar Allaoua
Country: 
Tunisie
Volume & Issue: 
Volume 03, Issue 11, November 2021
Page No: 
2021-2031
Abstract: 

Le présent travail consiste à faire une cartographie détaillée de l’érosion hydrique dans les deux bassins versants de l’oued Sekrouna et celui de l’oued Seil. Il s’agit d’une étude comparative entre un bassin versant montagnard (Sekrouna) et un bassin versant de piémont (Seil). Une étude détaillée du réseau hydrographique et de son organisation spatio-temporelle sera faite en s’appuyant essentiellement sur la photo-interprétation et l’observation du terrain. L’attribution d’une hiérarchie à ce réseau hydrographique parait intéressante pour se renseigner davantagesur le degré de perturbation du paysage morphologique, le comportement vigoureux de l’écoulement et se tenir au courant de la dynamique érosive et de sa tendance. Le réseau hydrographique doit être étudier conjointement avec les caractéristiques du substratum géologique, des sols et des formations superficielles (perméabilité, compartimentage morpho-pédologique et mode d’occupation du sol). Ce sont les éléments nécessaires pour cartographier la vulnérabilité dans les deux bassins versants Seil et Sekrouna à l'érosion hydrique. La méthodologie consiste à intégrer dans un SIG quatre facteurs contrôlant l’érosion : La pente, la perméabilité des affleurements géologiques et des formations superficielles, l’érosivité des pluies et l’occupation du sol. Les cartes obtenues de chaque thème sont intégrées dans un Système d'Information Géographique pour établir une carte de vulnérabilité à l'érosion hydrique, qui sera validée par des observations de terrain.

KeyWords: 
Erosion hydrique, paramètres morphométriques, compartiments morphopédologiques, vulnérabilité.