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Full-Text Articles in Physical and Environmental Geography
Measuring The Morphologic Response Of Braided Rivers To Lateral Constriction, Victoria Barlow
Measuring The Morphologic Response Of Braided Rivers To Lateral Constriction, Victoria Barlow
Electronic Thesis and Dissertation Repository
The aim of this thesis is to understand the morphologic changes to a set of historically braided rivers that have been narrowed. Braided rivers from the agriculturally developed Canterbury Plains, New Zealand, were studied from a period prior to much development (mid-1900s) to the present. Narrowing of channels, decreased braiding intensity, and loss of braided planforms were determined based on aerial imagery, changing the geography of braiding along all rivers. Channel width and count were statistically correlated and show the predictability of braiding change based on narrowing. Reaches with initially wide channels require more narrowing to induce a simplification of …
Morphological Bedload Transport In Gravel-Bed Braided Rivers, Sarah E. K. Peirce
Morphological Bedload Transport In Gravel-Bed Braided Rivers, Sarah E. K. Peirce
Electronic Thesis and Dissertation Repository
Gravel-bed braided rivers, defined by their multi-thread planform and dynamic morphology, are commonly found in proglacial mountainous areas. With little cohesive sediment and a lack of stabilizing vegetation, the dynamic morphology of these rivers is fundamentally the result of bedload transport processes but our understanding of the fundamental relationships between channel form and bedload processes remains incomplete. For example, the area of the bed actively transporting bedload, known as the active width, is strongly linked to bedload transport rates but these relationships have not been investigated systematically in braided rivers. This research builds on previous research to investigate the relationships …