Prediction of sediment yield at storm period in Northwest Algeria

This paper studies the hydrodynamics and variability of stream flow and sediment yield in Wadi El Hammam, located in the semi-arid region of Algeria. In this location, hysteresis effects are obvious especially during high discharge periods. The sediment concentration and load maxima go several month...

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Bibliographic Details
Published inArabian journal of geosciences Vol. 10; no. 9; pp. 1 - 17
Main Authors Madani Cherif, Hayet, Khanchoul, Kamel, Bouanani, Abderezzak, Terfous, Abdellali
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2017
Springer Nature B.V
Springer
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Summary:This paper studies the hydrodynamics and variability of stream flow and sediment yield in Wadi El Hammam, located in the semi-arid region of Algeria. In this location, hysteresis effects are obvious especially during high discharge periods. The sediment concentration and load maxima go several months before discharge maxima, while decreased sediment concentrations are noticed during the discharge peaks. In order to explain these phenomena, we have adopted a methodology that consists of finding a simple regression model capable of explaining the sediment load as a function of the water discharge measured at gauging stations of three rivers at various scales, e.g., annual and seasonal. Suspended sediment concentrations are measured during a 22-year period (1986/1987–2007/2008). The results have shown that the power model explains the greatest part of the variance (80%). The changes in sediment availability result in so-called hysteresis effects. In this work, we have described different loops: clockwise or positive hysteresis loops and anti- or counter-clockwise hysteresis loops. The analysis of the seasonal sediment yields has shown that the autumn season contributes a large proportion of the annual sediment yield (62%).
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-017-2983-3