Unsteady and heterogeneous boundary conditions and their impact on sediment transport and landscape morphology ...
While sediment transport and landscape morphology are well-characterized under the simplifying conditions of steady and uniform inputs, the effects of heterogeneity and unsteadiness are less well-constrained. This dissertation investigates the effects of heterogeneous and fluctuating inputs on uplan...
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| Format: | Thesis |
| Language: | English |
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The University of Texas at Austin
2019
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.26153/tsw/3395 https://repositories.lib.utexas.edu/handle/2152/76306 |
| Summary: | While sediment transport and landscape morphology are well-characterized under the simplifying conditions of steady and uniform inputs, the effects of heterogeneity and unsteadiness are less well-constrained. This dissertation investigates the effects of heterogeneous and fluctuating inputs on upland sediment transport, coastal margin morphology and sediment routing, and turbidity current dynamics and deposition. In my first project, I characterize how cycles of flooding and normal flow influence delta island shape and evolution. Using the Surface Transport and Earth-surface Processes (STEP) Basin, located at the Morphodynamics Lab at the J. J. Pickle Research Center, I determine the morphological effects of mixed transport type, where sediment is alternately suspended and delivered as bedload in floods and normal flow. The cumulative effect of these types of transport forms a flow bifurcation around a delta island. I find that delta islands are a consequence of mixed transports, rather than an invariant ... |
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