ERSC 2P16 Lecture Notes - Lecture 18: Sediment Transport, Wash Load, Silt
6 Aug 2015
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Document Summary
Bed material load makes up many arenites and rudites in the geological record. Contact load: particles that move in contact with the bed by sliding or rolling over it. Saltation load: movement as a series of hops along the bed, each hop following a ballistic trajectory. When the ballistic trajectory is disturbed by turbulence the motion is referred to as suspensive saltation. Intermittent suspension load: carried in suspension by turbulence in the flow. Intermittent because it is in suspension only during high flow events and otherwise resides in the deposits of the bed. Bursting is an important process in initiating suspension transport. In the section on grain size distributions we saw that some sands are made up of several normally distributed subpopulations. These subpopulations can be interpreted in terms of the modes of transport that they underwent prior to deposition.
