Temporal Variability in Sediment Concentration and Hysteresis in the Wadi Kebir Rhumel Basin of Algeria

Abstract

The relation between sediment concentration (C) and discharge (Q), for a hydrological event, such as a flood, is studied by analysing timeseries plot (discharge and sediment concentration, time). Comparing C/Q ratios at a given discharge on the rising and recession limbs of the hydrograph provides a consistent, reliable method for categorising C-Q relations. Three common classes of such relations are clockwise loop, counterclockwise loop and figure eight. Temporalgraph mode and skewness influence the type of relation, whereas a timeseries plot spread affects the details of the particular C-Q (its graphical breadth, shape, orientation and plotted location). Field examples of the various types of relation are given, for the several floods in the Wadi Kebir Rhumel Basin in North-East of Algeria. The hysteresis pattern in the downstream Kebir Rhumel Basin is dominantly counterclockwise and the relationship between the discharge (Q) and sediment load (Qs = Q x C) rates of rising and recession limps show an excellent exponential tendency for several analysed floods.

Journal of Water and Land Development

“…The results of this research were compared with other studies conducted in the Kebir Rhumel Watershed to estimate soil erosion by considering different measurements at the hydrometric stations and bathymetric surveys in the Beni Haroun Dam, for example REMINI [2011] andTAMRABET et al [2019].…”

“…It is characterised by a softer topography and moderate precipitation (about 600 mm•y -1 ). The surface area of this basin is 4062.42 km 2 , the average elevation is 775.27 m, while the minimum and maximum elevations are 127 and 1722 m. Wadi El Kebir is the result of the confluence of two Wadis (Wadi Enndja and Wadi Rhumel) [MAROUF, REMINI 2011].…”

Load Sediments Quantification in Algerian North-West Basins by Ann (Artificial Neurons Network) Method

“…Furthermore, the highest solid flowrates were recorded during the floods that come after drought periods (June to October). In this case, the greatest contribution of the sediments comes from the valley of the basin due to the climatic conditions (high temperature during the summer season and the first rain drops of heavy rains [28]. It is hardly possible that a solid flowrate is important because of degraded soil being ravaged by the first floods; therefore, the predictive power of the chosen model is strong and the function that links the solid flowrates to the liquid flowrates is in linear form.…”

“…The phenomenon of sediments reaching the dams every year has prompted many researchers who have tried to solve this problem with several methods. In this context, we mention the works of Tixeront [1], Capolini [2], Ghorbel and Claude [3], Heusch [4], Milliman and Meade [5], Sogreah [6], Demmak [7], Colombani [8], Walling [9], Probst and Suchet [10], Lahlou [11], Rais and Abidi [12], Albergel [13], Snoussi et al [14], Merzouki [15], Moukhchane et al [16], Meddi [17], Bouraba [18], Remini and Avenard [19], Remini [20], Terfous et al [21], Ghenim et al [22] Megnounif et al [23], Bouanani [24], Dechemi et al [25], Achite and Touaibia [26], Touaibia et al [27], Marouf and Remini [28], Marouf [29],who have studied some Algerian, Tunisian, and Moroccan basins. In reality, the problem is very difficult, complex and far from being solved with the current theoretical formulas.…”

Impact study of Beni-Haroun dam on the environmental and socio-economic elements in Kébir-Rhumel basin, Algeria

“…Office national d'assainissement -ONA) were collected. Regular analyses of the dam's water quality and Kebir-Rhumel basins watercourses were carried-out in situ and monitored over several years [MAROUF, REMINI 2014] where Beni-Haroun dam watercourse sediment loads were quantified [MAROUF, REMINI 2011]. During Beni-Haroun dam operation in 2014, continuous control and monitoring of the dam dike stability is developed.…”