Analysis of Hydro-Sedimentary Processes in the El-Malah East River Basin Upstream of the Beni Slimane Gauging Station (N Algeria)

Predicting suspended sediment load is essential to identify its intensity and define necessary actions for reduction. Mathematical models simulating are an interesting tool this purpose. The methodological approach adopted in article consists looking a regressive model that can better explain the discharge through flow by studying relationship at different temporal scales. work comprises analyzing quantifying intakes conveyed El-Malah East river Beni Slimane gauging station towards Koudiat Acerdoune reservoir. available data covers period from 1973/74 1988/1989 instantaneous measurements of liquid Ql – Suspended concentration C 1985/86 1996/97 daily mean discharges precipitations. Only power relations obtained on seasonal scale giving best coefficient determination have been selected quantification hydrometric availability (1985/86 1996/97). optimization rating curves has validated comparison estimated values ​​with ​​observed fitting Normal distribution residues datasets. use these highlighted intra-annual contributions 0.088 Mt per year, representing specific degradation about 325 t.km-2y-1 (423 bed loads). results also shown highest intake occurs spring (45.72 %), winter (32.36 %) autumn (11.93 seasons. This distribution, as well monthly rainfalls, allowed conclusion runoff does not always correspond rainy period. precipitation (38.74 (32.25 (21.53 showed participate each one with 28.31 27.03% total annually, while summer 23.28 21.38 %, respectively. be verified improved increasing size series. They provide appreciable elements others basins same order, located semi-arid arid regions subjected similar phenomena. allow basin managers policymakers consider fight against land erosion, preserve human activities, increase life Koudiet dam 60 km downstream watershed outlet, facilitate decision-making planning, ensure effective management. Keywords: Rating curve; Regression; Residues; Surface degradation; runoff; load.