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Full-Text Articles in Geomorphology
Bed Particle Displacement In A Wandering Gravel-Bed River, Ryan Mcqueen
Bed Particle Displacement In A Wandering Gravel-Bed River, Ryan Mcqueen
Electronic Thesis and Dissertation Repository
The primary goal of this thesis was to investigate the influence of channel morphology on individual bed particle path lengths in a wandering gravel bed river, the San Juan River, BC. This was achieved through tracking the transport of sedimentary particles using PIT tags and also capturing changes in channel morphology through repeat topographic surveys over the same three year time period as the tracer tracking. Particle transport tended to remain within the riffle-pool-bar sequence in which they were seeded, with modal path lengths related to areas of deposition along bar margins, especially at the bar apex region. This aligned …
Planform Change And Bedload Transport In Braiding Rivers, Lara Middleton
Planform Change And Bedload Transport In Braiding Rivers, Lara Middleton
Electronic Thesis and Dissertation Repository
Proglacial gravel-bed braided rivers have a dynamic planform composed of multiple unstable channels and ephemeral bars. The planform position is seen to change during high flows as the position of channels and bars is seen to change. These changes are produced as pulses of bedload transport are mobilized and transported downstream, causing an observable change in the river planform and morphology. While it is known that bedload transport, morphological change and planform change in a braided river are inter-related the relationships have not been quantified. The first component of this research was to build on previous results by re-analyzing daily …