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RISBed Topography and Sand Transport Responses to a Step Change in Discharge and Water Depth
Publisher: American Society of Civil Engineers
Abstract: At base-flow conditions, ephemeral streams with mobile beds may inherit bed topography caused by previous higher flow events, resulting in bed topography that is not in equilibrium with flow conditions. Major flow events ...
Erosion of Sand from a Gravel Bed
Publisher: American Society of Civil Engineers
Abstract: Cleaning of fine sediment out of gravel streambeds has become an important method to restore affected stream habitats. Introducing the increased flows needed to entrain fine sediments without eroding the coarser fractions ...
Erosion of Sand from a Gravel Bed
Publisher: American Society of Civil Engineers
Abstract: Cleaning of fine sediment out of gravel streambeds has become an important method to restore affected stream habitats. Introducing the increased flows needed to entrain fine sediments without eroding the coarser fractions ...
Sediment Transport and Bed-Form Characteristics for a Range of Step-Down Flows
Publisher: ASCE
Abstract: Ephemeral streams with mobile beds represent a challenging environment for sediment transport prediction. Bed topography from relatively infrequent high flow events may persist after hydrograph recession, resulting in ...
Structural Changes of Mobile Gravel Bed Surface for Increasing Flow Intensity
Publisher: ASCE
Abstract: The structure of a mobile bed in a laboratory channel composed of sand and gravel (D50=8 mm) was characterized over a series of experiments with steady flows from a low flow, where only the finer fractions of the bed ...
Effect of Increasing Antecedent Flows on Equilibrium Bed-Load Transport Rates in a Laboratory Channel with a Sand and Gravel Bed Channel
Publisher: ASCE
Abstract: Experiments were conducted in a laboratory flume in which gravel and total bed-load rates were measured continuously using independent methods that allowed evaluation of the effect of four antecedent flow conditions on the ...
Sediment Transport and Bed Topography for Realistic Unsteady Flow Hydrographs of Varying Length in a Laboratory Flume
Publisher: American Society of Civil Engineers
Abstract: Complex interactions between flowing water and bedforms in rivers with sand beds during changing flow rates may result in bedforms, flow resistance, and sediment transport rates that differ on the rising and falling limbs ...
Examining the Generality of τ0/TKE for Gravel and Cobble Beds with Sand Fill
Publisher: American Society of Civil Engineers
Laboratory Calibration of Impact Plates for Measuring Gravel Bed Load Size and Mass
Publisher: American Society of Civil Engineers
Abstract: Continuous monitoring of gravel transport in rivers is necessary for understanding the effect of dam removal on river systems. Impact plates, such as those deployed on the Elwha River in the state of Washington, are a ...
Turbulent Flow and Sand Transport over a Cobble Bed in a Laboratory Flume
Publisher: American Society of Civil Engineers
Abstract: Improving the prediction of sand transport downstream of dams requires characterization of the interaction between turbulent flow and near-surface interstitial sands. The advanced age and impending decommissioning of many ...