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Quantitative approach to water erosion at different spatial scales: basin of Oued Mina
- TOUAÏBIA, BENINA, DAUTREBANDE, SYLVIA, GOMER, DIETER, AIDAOUI, ABDALLAH
- Hydrological sciences journal 1999 v.44 no.6 pp. 973-986
- basins, dams (hydrology), marl, models, rainfall simulation, regression analysis, sediment transport, sediments, water erosion, watersheds, Algeria
- The complex phenomenon of water erosion in river basins is examined. The approach adopted aimed to (a) quantify erosion at several spatial scales, using the Wischmeier method, rainfall simulation over 1 and 87 m2 plots, experimental basins, small dams and a reservoir, and (b) to seek the regression model which best explains the relationship between sediment transport and flow rates for the different forms of erosion. The marl zone, which is the main source of sediment for the reservoir and represents a fifth of the total area of the Mina basin in Algeria, was the experimental area. The results show that, considering the complexity of the factors, it is impossible to extrapolate at different scales. The power model characterizes the relationship between sediment transport and flow rates, whatever the spatial scale considered.