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Abstract
Alteration of sediment dynamics is a common effect of human disturbance in fluvial systems. The longevity of human-induced changes and the implications of altered sediment dynamics for system-wide responses to disturbance are not entirely understood. In this study, I calculated sediment entrainment potential (τbf/τcr) for the D50 particle measured for 34 reaches located in three alluvial streams currently adjusting to historic disturbance, including channelization and land clearance, that have large in-channel sediment storage features. Analysis of the spatial variability of τbf/τcr values within the three study streams suggests that most study reaches are located in active transport zones, with the exception of three reaches in two of the study streams that appear to be located within sediment storage zones. The results of this research suggest that there is great potential for in-channel sediment storage features to be reworked and to serve as secondary sources of sediment well into the future.
