On the variability of the sediment concentration in currents on steep slopes: a simplified approach |
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| Authors: | L Franzi |
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| Institution: | Regione Piemonte, Soil Defence Department, Research Staff, Corso Torbona 12, 10153 Torino, Italy |
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| Abstract: | Based on the analysis of the results of flume experiments and on a simplified theoretical approach, a formula is proposed for the evaluation of the total solid load in a water–sediment current. The obtained results show that the sediment concentration of the water–sediment currents gradually varies from the typical values of bed load to those typical of debris flows, even when the clay concentration in the whole current is not negligible in comparison with the total solid load. The proposed simplified approach confirms the theoretical results obtained by the application of more complex rheological models. Besides the proposed theoretical interpretation of the laboratory experimental results seems to confirm a unified view of the different types of solid transport, that has been presented elsewhere. |
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| Keywords: | Debris flows Bed load Sediment concentration Hyperconcentrated flow Bed load formulas Water–sediment mixtures |
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