Numéro de la revue: 34
Auteurs: Mahmoud Tourki1, Kamel Khanchoul l2, Yves Le Bissonnais 3 & Fahima Belala 4
1Département d’Hydraulique, Université Badji Mokhtar BP.12, Annaba, 23000, Algérie.
2 Département Géologie, Laboratoire Sol set Développement Durabl,e Université Badji Mokhtar, BP.12, Annaba, 23000, Algérie.
3Laboratoire d’étude des Interactions Sol-Agrosystème-Hydrosystème, UMR LISAH.
2 places Viala 3406, Montpellier cedex 2 France.
4Faculté des sciences biologiques, Département d’écologie et environnement USTHB,
BP 32 EL Alia, 16111 Bab Ezzouar ,Alger, Algérie.
Abstract
The present work represents an assessment of suspended sediment yield from the Upper Kebir Wadi catchment (1068 km2) over 33 years (from 1973 to 2006). Long-term of annual suspended sediment loads are estimated using non-linear power model, developed on mean discharge class technique as sediment rating curves. The results show that the mean annual sediment yield is equal to 884 T km-2 yr-1 during the study period. Moreover, the long term variability analysis of sediment load seems to be very high from year to year depending on climatic conditions. Most sediment loads are transported during the winter season, which represents 56% of the total sediment load. The understanding of sediment transport relationships gained from this study should provide a good starting point for managers and policy makers to begin addressing sediment issues within the catchment.
Keywords : Erosion- Cachement- Sediment- Upper Kebir Wadi-Kebir Rhumel .
Erosion, Cachement, Sediment, Upper Kebir Wadi,Kebir Rhumel