Abstract
Mountain gravel-bed rivers typically display a surface layer that is armored. The armored surface layers form at low flows, but there is little evidence of their condition during floods, when significant hydraulic and ecologic disturbance occurs. Some flume experiments have been used to conclude that armor layers wash out during floods, although other experiments have produced a persistent armor layer. We conducted two runs of flume experiments to study the breakup of armor layers under the condition of no sediment supply. In the two runs of flume experiments, armor layers were formed at low-flow, and then continuously to increase the flow with a small range. Through observing the phenomenon of the experiments and measuring the bed-load transport, we have found that the armor layer would not always be broken up if the flow is higher than the formative flow, unless the flow increases to a certain degree.
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© 2009 Tsinghua University Press, Beijing and Springer-Verlag GmbH Berlin Heidelberg
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Wang, T., Liu, X. (2009). The Breakup of Armor Layer in a Gravel-Bed Stream with No Sediment Supply. In: Advances in Water Resources and Hydraulic Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-89465-0_161
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DOI: https://doi.org/10.1007/978-3-540-89465-0_161
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-89464-3
Online ISBN: 978-3-540-89465-0
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