--> --> Abstract: Determining Fluvial Flow Conditions from Preserved Bed Set Geometry, by Robert C. Mahon and Brandon Mcelroy; #90181 (2013)
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Determining Fluvial Flow Conditions from Preserved Previous HitBedNext Hit Set Geometry

Robert C. Mahon and Brandon Mcelroy
University of Wyoming Department of Geology and Geophysics, Laramie, WY

The downstream movement of bedforms in flowing water can be described as the combination of two components: Previous HitbedNext Hit form translation and Previous HitbedNext Hit form deformation. Previous work hypothesizes that deformation (change in shape) of Previous HitbedNext Hit topography is primarily a function of the suspended portion of Previous HitbedNext Hit material load. However, a complete experimental determination of the physical conditions resulting in Previous HitbedNext Hit deformation remains to be presented. This study will focus on the hypothesis that the ability of flow to suspend sediment, best characterized by the Rouse parameter, provides a primary control on the sediment bypass fraction at the Previous HitbedNext Hit form scale and therefore on rates and fluxes of Previous HitbedNext Hit deformation. A set of laboratory flume experiments will be conducted with migrating dunes on a natural sand Previous HitbedNext Hit to test this hypothesis. A series of experimental runs will be undertaken to measure Previous HitbedNext Hit deformation rates over a range of Rouse number values, {0.5≤P≤4}. Furthermore, Previous HitbedNext Hit set stratigraphy resulting from the migration of deforming Previous HitbedNext Hit forms will also be measured and a Previous HitrelationshipNext Hit between deformation rates, flow parameters and the curvature of Previous HitbedNext Hit set bounding surfaces will be modeled. These results have the potential for the development of new techniques by which indirect measurements of Previous HitbedNext Hit material load can be calculated in natural sand-Previous HitbedNext Hit rivers, as well as a model framework from which sediment hydrodynamics can be calculated from the curvature of preserved Previous HitbedNext Hit set bounding surfaces (shown to be the result of Previous HitbedTop deformation) in the stratigraphic record.

AAPG Search and Discovery Article #90181©2013 AAPG/SEG Rocky Mountain Rendezvous, University of Wyoming, Laramie, Wyoming, September 27-30, 2013