Kenneth H. Tiedemann
Statistical analysis, Environmental modelling, Sediment flux, Sediment concentration
Understanding sediment delivery in river basins is a key issue for erosion and sediment research. This study uses multiple regression analysis to analyze the determinants of variability of sediment flux yields in a representative sample of 57 of the world’s major rivers. The study has three key findings. First, variation in sediment yields is strongly influenced by variation in precipitation runoff, and a one per cent increase in the precipitation runoff variability ratio increases the sediment flux variability ratio by 0.93 per cent. Second, variation in sediment yields is strongly influenced by variations in sediment concentration, and a one per cent increase in the sediment concentration variability ratio increases the sediment flux variability ratio by 0.99 per cent. Third, variation in sediment yields is weakly influenced by basin area, and a one per cent increase in area reduces the sediment flux variability ratio by 0.0064 per cent.
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